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    Tytuł:
    Analysis of a possible application of a small power plant in the Organic Rankine Cycle, which apply waste heat from a combustion engine
    Autorzy:
    Żabski, J.
    Gumkowski, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1191839.pdf
    Data publikacji:
    2018
    Wydawca:
    Gdańska Szkoła Wyższa
    Tematy:
    Organic Rankine Cycle
    working fluids
    waste heat
    Opis:
    Some considerations on the waste heat treatment, heat and power combined generation and principles of the Organic Rankine Cycle and its application are produced. A thermodynamic screening of eight working fluids for Organic Rankine Cycle (ORC) was carried out. All investigated agents were single component fluids. The considered ORC systems operated at the upper temperature in the range Tmax=146-185°C and the lower one Tmin=27-37°C. The highest pressure in the cycles equalled pmax=3500 kPa and pmin=85 kPa. The cycles were run at subcritical pressures and the saturated vapour line was of the overhanging type in all cases. Heat regeneration was not considered in this paper. The heat source for the ORC system was heated air exhausted from the cooling system of an opposed-piston engine. The temperature of this heat at the inlet to ORC was equal to Th,in=230°C. Air was also the heat sink for the ORC with the inlet temperature Tcold,in=20°C. The power output of the ORC, neglecting electric generator efficiency, was kept in the range N=10-11 kW. Calculated thermal efficiencies h held values between 0.121 and 0.164.
    Źródło:
    Eco-Energetics: technologies, environment, law and economy; 2018, 1; 127--135
    2657-5922
    2657-7674
    Pojawia się w:
    Eco-Energetics: technologies, environment, law and economy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Performance analysis of a new combined organic Rankine cycle and vapor compression cycle for power and refrigeration cogeneration
    Autorzy:
    Toujani, N.
    Bouaziz, N.
    Chrigui, M.
    Kairouani, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/175539.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    organic Rankine cycle
    cogeneration
    vapor compression cycle
    new combined
    Opis:
    Organic Rankine cycle (ORC) is considered the most used technology in low temperature heat recovery units for cogeneration (electricity and cold). In this study, the effect of the operating parameters, in particular the condensation and the vaporization temperatures on the performance of the cycle are analyzed. In addition, we developed a new combination of organic Rankine cycle and vapor compresion cycle systems to make cogeneration with a negative cold (-10–0◦C), as well with a positive cold (0–10◦C). Three configurations are examined and studied in terms of energy efficiency, namely the performance of each configuration including net power, refrigeration capacity and overall efficiency, the thermal efficiency for ORC and the coefficient of performance for VCC. The used working fluids are n-hexane for the ORC and R600 for the VCC. We also try to apply this new system to have the cogeneration with congelation temperatures. The results show that, for cogeneration with negative cold, among the three configurations that we have developed, the cycle with recovery is preferable in which it has a better energy performance. For a hot spring of 1000 kW, this cycle can provide simultaneously, a maximum net work of 17 kW and a maximum net cooling capacity of 160 kW and an overall coefficient of the order of 0.3. For the production of positive cold, among the three configurations that we have developed, the basic cycle (without recovery) is the most suitable. With the same source of heat a maximum net work of 65 kW and a net cooling capacity in the order of 1000 kW with a global coefficient in the order of 1.05 is obtained. Our system is not only limited to be exploited for a temperature range between -10 ◦C and 10 ◦C, but can also be used with other fluids for lower temperatures (congelation temperatures).
    Źródło:
    Transactions of the Institute of Fluid-Flow Machinery; 2018, 140; 39-81
    0079-3205
    Pojawia się w:
    Transactions of the Institute of Fluid-Flow Machinery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Design analysis of turbines for co-generating micro-power plant working in accordance with organic Rankine’s cycle
    Autorzy:
    Mikielewicz, J.
    Piwowarski, M.
    Kosowski, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/259369.pdf
    Data publikacji:
    2009
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    micro power plant
    microturbines
    organic Rankine cycle
    turbine design
    Opis:
    This paper presents results of a design analysis of turbines for co-generating micro-power plant working in accordance with organic Rankine’s cycle and using biofuel. The heat power range from 25 kW to 100 kW with corresponding available electric power from 2kW to 12kW, was considered. Designs of axial-flow turbines (single-stage and multi-stage ones, also those partially fed), radial-flow and axial-radial -flow ones, were analyzed. Particular variants of the solutions were compared to each other.
    Źródło:
    Polish Maritime Research; 2009, S 1; 34-38
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Criteria for selection of working fluid in low-temperature ORC
    Autorzy:
    Mikielewicz, D.
    Mikielewicz, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/185262.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    micro CHP
    organic Rankine cycle
    mikro CHP
    organiczny cykl Rankine'a
    Opis:
    The economics of an ORC system is strictly linked to thermodynamic properties of the working fluid. A bad choice of working fluid could lead to a less efficient and expensive plant/generation unit. Some selection criteria have been put forward by various authors, incorporating thermodynamic properties, provided in literature but these do not have a general character. In the paper a simple analysis has been carried out which resulted in development of thermodynamic criteria for selection of an appropriate working fluid for subcritical and supercritical cycles. The postulated criteria are expressed in terms of non-dimensional numbers, which are characteristic for different fluids. The efficiency of the cycle is in a close relation to these numbers. The criteria are suitable for initial fluid selection. Such criteria should be used with other ones related to environmental impact, economy, system size, etc. Examples of such criteria have been also presented which may be helpful in rating of heat exchangers, which takes into account both heat transfer and flow resistance of the working fluid.
    Źródło:
    Chemical and Process Engineering; 2016, 37, 3; 429-440
    0208-6425
    2300-1925
    Pojawia się w:
    Chemical and Process Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dobór układu odzysku egzergii chłodu z regazyfikacji LNG
    Selection of cold exergy recovery system from LNG regasification
    Autorzy:
    Andryka, Jakub
    Powiązania:
    https://bibliotekanauki.pl/articles/101703.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Śląska. Wydział Inżynierii Środowiska i Energetyki. Instytut Techniki Cieplnej
    Tematy:
    regazyfikacja
    LNG
    układ ORC
    egzergia
    regasification
    Organic Rankine Cycle
    exergy
    Opis:
    Celem projektu był dobór układu odzysku egzergii chłodu z regazyfikacji skroplonego gazu ziemnego (LNG). Podstawowymi założeniami analizy były małe rozmiary takiego układu jak i jego możliwa mobilność. Stworzono kilka wariantów takiej instalacji składających się z układu ORC, mikro turbiny gazowej lub gazowego silnika tłokowego, którego spaliny dostarczają ciepło do układu ORC odparowując czynnik obiegowy, oraz instalacji odparowania skroplonego gazu ziemnego, którą tworzą wymiennik odparowujący go, który pełni jednocześnie rolę skraplacza czynnika obiegowego w układzie ORC, oraz cysterna z LNG. Następnie każdy z wariantów poddano analizie termodynamicznej oraz oszacowano powierzchnię wymiany ciepła poszczególnych wymienników.
    The aim of the project was to select the recovery system of cold exergy from regasification of liquefied natural gas (LNG). The basic assumptions of the analysis were the small size of such a system as well as its possible mobility. Several variants of such installation have been created consisting of an ORC system, a micro gas turbine or a gas piston engine, whose exhaust gas supplies heat to the ORC by evaporating the working fluid and a liquefied natural gas evaporation installation, which is created by the evaporation heat exchanger, which also acts as a condenser of working fluid in the ORC system and the LNG tanker Then, each of the variants was subjected to thermodynamic analysis and the heat exchange surface area of individual heat exchangers was estimated.
    Źródło:
    Archiwum Instytutu Techniki Cieplnej; 2019, 6; 7-54
    2451-277X
    Pojawia się w:
    Archiwum Instytutu Techniki Cieplnej
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thermodynamic Performance Assessment of Different Fluids in a Typical Organic Rankine Cycle for Usage in Municipal Solid Waste Power Plant
    Autorzy:
    Özahi, E.
    Tozlu, A.
    Abuşoğlu, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1031184.pdf
    Data publikacji:
    2017-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    organic Rankine cycle
    waste to energy
    energy and exergy analyses
    Opis:
    This paper presents the energy and exergy analyses of some different organic fluids which can be used in an organic Rankine cycle adapted to a municipal solid waste power plant in the frame of energy recovery. The novelty of the study is to adapt a well-known organic Rankine cycle system theoretically to the existing municipal solid waste power plant where the exhaust gas with a temperature of almost 560°C is sent to atmosphere causing both energy loss and air pollution, and also violating the related legislation. The efficient organic fluid that can be used in such a plant is estimated by means of the thermodynamic analyses. It is known that, in a typical municipal solid waste power plant, a considerable amount of energy is sent up from a plant chimney to the atmosphere. This waste energy can be utilized by using an adapted organic Rankine cycle system with a proper organic fluid. In this frame, some different organic fluids were examined and compared thermodynamically in this study. The optimal operation conditions of some organic fluids, R141b, isobutane, R245fa, n-pentane and n-hexane have been evaluated by means of ASPEN and EES software programs. The effects of the outlet temperature of heat source on the energetic and exergetic efficiencies and the net power output at a given pinch point temperature difference were investigated. It can be deduced from the analyses that n-hexane has the highest energetic and exergetic efficiencies at all outlet temperatures of the heat source such as 8.92% and 34.47% at 82.08°C, respectively. It can also be stated that the maximum net power output is obtained by using the organic fluid n-hexane.
    Źródło:
    Acta Physica Polonica A; 2017, 132, 3; 807-812
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hybrid bearing development for high-speed turbomachinery in distributed energy systems
    Autorzy:
    Tkacz, E.
    Kozanecki, Z.
    Łagodziński, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/175541.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    oil-free bearings
    organic Rankine cycle turbomachinery
    design and manufacturing
    Opis:
    In the paper authors undertake the design of hydrostatic bearings and hybrid bearings for a specific application – hermetic high–speed turbogenerators for the electric power generation. The most common hydrostatic bearings are usually oil lubricated. On the contrary, the considered here machines are dedicated for the combined heat and power (CHP) production in organic Rankine cycle (ORC) systems and so the hydrostatic bearings use an organic, oil-free working fluid as the lubricant. The reader will acquire an insight into the special characteristics of hydrostatic bearings. Moreover, a new type of bearings, a hybrid bearing, is introduced, which combine both, hydrostatic and hydrodynamic effects. The designed bearings have been manufactured and their good performance confirmed during tests on a real machine.
    Źródło:
    Transactions of the Institute of Fluid-Flow Machinery; 2016, 131; 161-172
    0079-3205
    Pojawia się w:
    Transactions of the Institute of Fluid-Flow Machinery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of the use of waste heat from a glass melting furnace for electricity production in the organic Rankine cycle system
    Autorzy:
    Musiał, Arkadiusz Mateusz
    Antczak, Łukasz
    Jędrzejewski, Łukasz
    Klonowicz, Piotr
    Powiązania:
    https://bibliotekanauki.pl/articles/1845495.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    energy efficiency
    distributed generation
    organic rankine cycle
    ORC
    industrial waste heat
    Opis:
    In most production plants, waste heat is usually discharged into the environment, contributing to a reduction in the energy efficiency of industrial processes. This is often due to the low thermal parameters of the carriers in which this energy is contained, such as oils, water, exhaust gases or other post-process gases, which means that their use for electricity production in a conventional Rankine cycle may prove to be economically unprofitable. One of the technologies enabling the use of lowand medium-temperature waste heat carriers is the organic Rankine cycle (ORC) technology. The paper present results of calculations performed to evaluate potential electricity production in ORC using waste heat from a natural gas-fired glass melting furnace. The analysis was carried out assuming the use of a single-stage axial turbine, whose efficiency was estimated using correlations available in the literature. The calculations were carried out for three working fluids, namely hexamethyldisiloxane, dimethyl carbonate, and toluene for two scenarios, i.e. ORC system dedicated only to electricity production and ORC system working in cogeneration mode, where heat is obtain from cooling the condenser. In each of the considered cases, the ORC system achieves the net power output exceeding 300 kW (309 kW for megawatts in the cogenerative mode to 367 kW for toluene in the non-cogenerative mode), with an estimated turbine efficiency above 80%, in range of 80,75 to 83,78%. The efficiency of the ORC system, depending on the used working fluid and the adopted scenario, is in the range from 14.85 to 16.68%, achieving higher efficiency for the non-cogenerative work scenario.
    Źródło:
    Archives of Thermodynamics; 2021, 42, 1; 15-33
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thermographic investigation of the cogenerative ORC system with low-boiling medium
    Badania termowizyjne układu kogeneracyjnego ORC z czynnikiem niskowrzącym
    Autorzy:
    Kaczmarczyk, T. Z.
    Żywica, G.
    Ihnatowicz, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/329692.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
    Tematy:
    organic Rankine cycle
    low-boiling medium
    thermographic
    obieg organiczny Rankine’a
    czynnik niskowrzący
    termografia
    Opis:
    The paper presents the results of experimental investigations of the ORC system equipped with the expansion valve simulating microturbine operation. The aim of the research was to verify the correct functioning of the installation components and to access the technical condition of the thermal insulation in the heating and cooling mode with regard to the design assumptions. The research was conducted for different values of medium flow rates. The images were acquired using the thermal imaging camera FLIR E50, which is equipped with a specialized software. On the basis of the experimental results, the heat losses have been estimated, together with the places which were the major source of loss (the so-called thermal bridges). It was shown experimentally that the application of a thermal imaging camera can constitute a simple and fast thermal diagnostics method for installations of this type.
    W pracy przedstawiono wyniki badań eksperymentalnych układu ORC z zaworem rozprężnym symulującym pracę mikroturbiny. Badania miały na celu sprawdzenie poprawności działania podzespołów instalacji oraz ocenę stanu technicznego izolacji termicznej podczas procesów grzania, chłodzenia i regeneracji w stosunku do założeń projektowych. Badania przeprowadzono dla wybranych natężeń przepływów mediów roboczych. W badaniach wykorzystano kamerę termowizyjną FLIR E50 wraz ze specjalistycznym oprogramowaniem. Na podstawie wyników badań oszacowano straty ciepła instalacji oraz określono miejsca, w których występowały największe straty (tzw. mostki termiczne). Wykazano, że zastosowanie kamery termowizyjnej może być szybką i prostą metodą diagnostyki termicznej tego typu instalacji energetycznych.
    Źródło:
    Diagnostyka; 2015, 16, 3; 25-32
    1641-6414
    2449-5220
    Pojawia się w:
    Diagnostyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental investigation of domestic micro-CHP based on the gas boiler fitted with ORC module
    Autorzy:
    Wajs, J.
    Mikielewicz, D.
    Bajor, M.
    Kneba, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/240505.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    micro-CHP
    organic Rankine cycle
    prototype domestic unit
    mikro CHP
    organiczny obieg Rankine'a
    Opis:
    The results of investigations conducted on the prototype of vapour driven micro-CHP unit integrated with a gas boiler are presented. The system enables cogeneration of heat and electric energy to cover the energy demand of a household. The idea of such system is to produce electricity for own demand or for selling it to the electric grid – in such situation the system user will became the prosumer. A typical commercial gas boiler, additionally equipped with an organic Rankine cycle (ORC) module based on environmentally acceptable working fluid can be regarded as future generation unit. In the paper the prototype of innovative domestic cogenerative ORC system, consisting of a conventional gas boiler and a small size axial vapour microturbines (in-house designed for ORC and the commercially available for Rankine cycle (RC)), evaporator and condenser were scrutinised. In the course of study the fluid working temperatures, rates of heat, electricity generation and efficiency of the whole system were obtained. The tested system could produce electricity in the amount of 1 kWe. Some preliminary tests were started with water as working fluid and the results for that case are also presented. The investigations showed that domestic gas boiler was able to provide the saturated/superheated ethanol vapour (in the ORC system) and steam (in the RC system) as working fluids.
    Źródło:
    Archives of Thermodynamics; 2016, 37, 3; 79-93
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparative investigation of working fluids for an organic Rankine cycle with geothermal water
    Autorzy:
    Liu, Y.-N.
    Xiao, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/240415.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    geothermal water
    energy efficiency
    organic Rankine cycle
    wody geotermalne
    efektywność energetyczna
    organiczny obieg Rankine'a
    Opis:
    In this paper, the thermodynamic investigation on the use of geothermal water (130°C as maximum) for power generation through a basic Rankine has been presented together with obtained main results. Six typical organic working fluids (i.e., R245fa, R141b, R290, R600, R152a, and 134a) were studied with modifying the input pressure and temperature to the turbine. The results show that there are no significant changes taking place in the efficiency for these working fluids with overheating the inlet fluid to the turbine, i.e., efficiency is a weak function of temperature. However, with the increasing of pressure ratio in the turbine, the efficiency rises more sharply. The technical viability is shown of implementing this type of process for recovering low temperature heat resource.
    Źródło:
    Archives of Thermodynamics; 2015, 36, 2; 75-84
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On the efficient use of a lowtemperature heat source by the organic Rankine cycle
    Autorzy:
    Mikielewicz, D.
    Mikielewicz, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/240003.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    organic rankine cycle
    heat supply
    energy efficiency
    organiczny obieg Rankine'a
    dostawy ciepła
    efektywność energetyczna
    Opis:
    The evaporation temperature is regarded as one of the major parameters influencing the organic Rankine cycle (ORC) efficiency. Majority of contributions in literature for ORC cycle analyses treat the heat source as if it had an infinite heat capacity. Such analyses are not valuable as the resulting temperature drops of the heat source needs to be small. That leads to the fact that the heat source is not well explored and in the case of waste heat utilization it can prove the poor economics of the ORC. In the present study cooperation of the ORC cycle with the heat source available as a single phase or phase changing fluids is considered. The analytical heat balance models have been developed, which enable in a simple way calculation of heating fluid temperature variation as well as the ratio of flow rates of heating and working fluids in ORC cycle. The developed analytical expressions enable also calculation of the outlet temperature of the heating fluid.
    Źródło:
    Archives of Thermodynamics; 2013, 34, 3; 61-73
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Working Fluid Selection for Simple and Recuperative Organic Rankine Cycle Operating Under Varying Conditions: A Comparative Analysis
    Autorzy:
    Igbong, Dodeye
    Nyong, Oku E.
    Enyia, James
    Agba, Ambrose
    Powiązania:
    https://bibliotekanauki.pl/articles/2023504.pdf
    Data publikacji:
    2021
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    organic rankine cycle
    organic working fluid
    supercritical
    exergy
    organiczny cykl Rankine'a
    organiczne ciecze robocze
    nadkrytyczny
    egzergia
    Opis:
    The selection of suitable working fluid for simple and recuperative organic Rankine cycle (ORC) operating under subcritical, superheated and supercritical conditions are investigated. 11 fluids with critical temperature above 1500C are considered as potential candidates. Performance screening parameters such as net power output, thermal efficiency, turbine sizing parameter (SP) and volumetric flow ratio (VFR), exegetic parameters like irreversibility rate, fuel depletion ratio, and improvement potential rate of exergy destruction were also evaluated. Results indicate that R600a, R236fa and R1233dz(E) demonstrated the best performance for subcritical, superheated and supercritical simple ORC, respectively. R236fa and R1233dz(E) proved more suitable for subcritical/superheated and supercritical recuperative cycles, respectively. The system exegetic efficiency is reveal to be significantly higher in subcritical/superheated (61-65%) cycles compared to the supercritical (35-45%) cycle, the evaporator seen as the main source of exergy destruction, accounting for 17-37% of inlet exergy destroyed and about 8-24% in the turbine.
    Źródło:
    Advances in Science and Technology. Research Journal; 2021, 15, 4; 202-221
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental investigation on a rotodynamic pump operating in the cogeneration system with a low-boiling working medium
    Autorzy:
    Kaczmarczyk, T.
    Żywica, G.
    Ihnatowicz, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/175328.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    organic rankine cycle
    micro-CHP
    rotodynamic peripheral pump
    low-boiling medium
    HFE7100
    Opis:
    The article presents the research carried out on the circulating rotodynamic pump (peripheral pump) operating in the organic Rankine cycle with or without regeneration. The low-boiling solvent HFE7100 was used as the working fluid. Its boiling point is around 61 ◦C at atmospheric pressure. An expansion valve, which simulated the operation of an expansion machine, was used to load the tested pump. The flow characteristics were given for the working media: a solution of glycol and HFE7100 in the condenser, thermal oil and HFE7100 in the evaporator and HFE7100 in the regenerator. The research results concerning the PK70 pump operating in an ORC cycle are reported for the HFE7100 temperature range 15-60 ◦C and the dynamic viscosity range of 0.132 to 0.66 mPas. The maximum flow rate and pressure of the pump during its operation in the ORC system were assessed. The analysis of the results demonstrates that the maximum efficiencies of the pump operating with or without regeneration were 44% and slightly below 37%, respectively. The impact of the selected physicochemical parameters of the working mediums on the pressure drops occurring in the ORC cogeneration installation was discussed. Based on the research conducted and the measurement results, the possibility to apply a PK70 unit as a circulating pump for the working medium in an ORC cycle was checked.
    Źródło:
    Transactions of the Institute of Fluid-Flow Machinery; 2016, 134; 63-87
    0079-3205
    Pojawia się w:
    Transactions of the Institute of Fluid-Flow Machinery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modeling, exergy analysis and optimization of cement plant industry
    Autorzy:
    Abutorabi, Hossein
    Kianpour, Ehsan
    Powiązania:
    https://bibliotekanauki.pl/articles/2106427.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Koszalińska. Wydawnictwo Uczelniane
    Tematy:
    exergy
    organic Rankine cycle
    thermodynamic analysis
    cement plant
    egzergia
    organiczny cykl Rankine'a
    analiza termodynamiczna
    cementownia
    Opis:
    This study investigates the recovery of wasted heat in the cement plant industries (Neka Cement Factory) in order to reduce the use of fossil fuels and greenhouse gas emissions. Cement is the most widely used man-made material. The global cement industry produces about 3.3 billion tons of cement annually. A lot of energy is needed to produce cement. About 200 kg of coal is used to produce each ton of cement. The cement industry also produces about five percent of the world's greenhouse gases. The method studied in this research is based on heat recovery from boilers installed at the outlet of a clinker cooler and a preheater in a cement factory. Due to the low temperature of the gases available, three different fluids, i.e. water, R134a and R245fa were considered as the operating fluids. Also, energy and exergy analyses are performed in a Rankin cycle and the selection of optimal parameters is considered by using genetic algorithm. The results of this study showed that water with optimized parameters leads to an increase in the production capacity from 5 to 9 MW. However, fluid R134a with optimized parameters leads to a 4% increase in exergy losses and it also increases the production capacity from 5 to 9 MW.
    Źródło:
    Journal of Mechanical and Energy Engineering; 2022, 6, 1; 55--66
    2544-0780
    2544-1671
    Pojawia się w:
    Journal of Mechanical and Energy Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The use of geothermal energy in co-generated heat and power production in Poland : a case study
    Autorzy:
    Mróz, Tomasz Maciej
    Grabowska, Weronika
    Powiązania:
    https://bibliotekanauki.pl/articles/2073770.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    cogenerated heat and power
    CHP
    organic rankine cycle
    ORC
    energy performance
    CO2 emission
    Opis:
    The paper presents the results of energy and environmental evaluation of geothermal CHP plant. The variant of CHP plant based on Organic Rankine Cycle (ORC) has been taken into consideration as the most favorable for the geothermal conditions prevailing in Poland. The existing geothermal well located in the city of Konin in Greater Poland (Wielkopolska) voivodship has been chosen as the case study. The conceptual design of CHP plant has been proposed and evaluated from energy and environmental point of view. The non-renewable primary energy consumption has been chosen as energy performance criterion. In the case of environmental performance carbon dioxide emission has been taken as evaluation criterion. The analysis has been performed for different operating conditions and three working fluids. The best energy performance can be spotted for working fluid R123, for which the reduction varies between 15200 and 11900 MWh/a. The working fluid R134a has a worse energy performance, which allows for the reduction of fossil fuels energy consumption in the range of 15000 and 11700 MWh/a. The total reduction of CO2 emission is the highest for working fluid R123: 5300 to 4150 MgCO2/a, the medium one for working fluid R134a: 5200 to 4100 MgCO2/a and the lowest for working fluid R227: 5000 to 4050 MgCO2/a. It has been shown that the construction of geothermal CHP plants based on Organic Rankine Cycle can be reasonable solution in Polish conditions. It is important concerning the need of reduction of fossil fuels primary energy consumption and carbon dioxide emission.
    Źródło:
    Archives of Environmental Protection; 2021, 47, 3; 82--91
    2083-4772
    2083-4810
    Pojawia się w:
    Archives of Environmental Protection
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of an impulse and a reaction turbine stage for an ORC power plant
    Autorzy:
    Zaniewski, Dawid
    Klimaszewski, Piotr
    Witanowski, Łukasz
    Jędzejewski, Łukasz
    Klonowicz, Piotr
    Lampart, Piotr
    Powiązania:
    https://bibliotekanauki.pl/articles/240056.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    CFD
    waste heat recovery
    steam turbine
    organic Rankine cycle
    ciepło odpadowe
    odzysk ciepła
    ORC
    organiczny cykl Rankine'a
    Opis:
    Turbine stages can be divided into two types: impulse stages and reaction stages. The advantages of one type over the second one are generally known based on the basic physics of turbine stage. In this paper these differences between mentioned two types of turbines were indicated on the example of single stage turbines dedicated to work in organic Rankine cycle (ORC) power systems. The turbines for two ORC cases were analysed: the plant generating up to 30 kW and up to 300 kW of net electric power, respectively. Mentioned ORC systems operate with different working fluids: DMC (dimethyl carbonate) for the 30 kW power plant and MM (hexamethyldisiloxane) for the 300 kW power plant. The turbines were compared according to three major issues: thermodynamic and aerodynamic performance, mechanical and manufacturing aspects. The analysis was performed by means of the 0D turbomachinery theory and 3D computational aerodynamic calculations. As a result of this analysis, the paper indicates conclusions which type of turbine is a recommended choice to use in ORC systems taking into account the features of these systems.
    Źródło:
    Archives of Thermodynamics; 2019, 40, 3; 137-157
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of the temperature difference between the heat source and the evaporation temperature in ORC systems working with natural refrigerants
    Autorzy:
    Rusowicz, Artur
    Grzebielec, Andrzej
    Łapka, Piotr
    Powiązania:
    https://bibliotekanauki.pl/articles/2073389.pdf
    Data publikacji:
    2022
    Wydawca:
    Centrum Rzeczoznawstwa Budowlanego Sp. z o.o.
    Tematy:
    Organic Rankine Cycle
    ORC
    refrigerant
    waste heat
    working fluid
    organiczny cykl Rankine'a
    chłodziwo
    strata ciepła
    płyn roboczy
    Opis:
    The use of waste heat in many branches of industry is limited due to temperature in the range of 30 to 100°C. One of the methods of using waste heat are devices that implement the Organic Rankine Cycle (ORC). In currently used ORC systems, the heat source temperature is at least 80oC, while the low temperature heat source (usually atmospheric air) has a temperature of 30oC. The work analyzes the influence of the organic fluids properties on the performance of the proposed installation driven by the waste heat and working based on the ORC. The basic operation parameters in nominal conditions were determined for three selected natural refrigerants R290, R600a, R717 and one synthetic R245fa. The condensing temperature 30oC were defined as a nominal value. The research results compare how the generated electric power will change depending on the temperature difference between the temperature of the heat source and the temperature of evaporation. It turns out that for a device with finite dimensions, the maximum power is obtained for a specific evaporation temperature. And this is not the highest temperature that can be achieved. The highest evaporation temperature allows for the highest efficiency of the system, but not the maximum of capacity.
    Źródło:
    Inżynieria Bezpieczeństwa Obiektów Antropogenicznych; 2022, 1; 46--57
    2450-1859
    2450-8721
    Pojawia się w:
    Inżynieria Bezpieczeństwa Obiektów Antropogenicznych
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zastosowanie prądnic z magnesami trwałymi do budowy mikroturbogeneratorów ORC
    Application of permanent magnet generators for the construction of ORC microturbogenerators
    Autorzy:
    Kaczmarczyk, T. Z.
    Żywica, G.
    Klonowicz, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/2056381.pdf
    Data publikacji:
    2018
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Napędów i Maszyn Elektrycznych Komel
    Tematy:
    mikroturbogenerator
    organiczny obieg Rankina
    silnik z magnesami trwałymi
    HFE7100
    microturbogenerator
    organic Rankine cycle
    permanent magnet motor
    Opis:
    W pracy omówiono zagadnienia związane z projektowaniem nowego typu maszyn elektrycznych dedykowanych do pracy w układach kogeneracyjnych małej mocy. Do konwersji ciepła odpadowego ze spalania biomasy na energię elektryczną zastosowano mikroturbogenerator zasilany parą czynnika niskowrzącego HFE7100. Wysokoobrotowy turbogenerator o mocy nominalnej 2,5 kWe pracuje w obiegu ORC, który oprócz energii elektrycznej umożliwia produkcję energii cieplnej na poziomie 20 kW. Do budowy wirnikowej maszyny ekspansyjnej zastosowano trójfazowy, synchroniczny silnik z magnesami trwałymi o maksymalnej prędkości obrotowej 80000 obr/min. Zaprojektowany i zbudowany mikroturbogenerator jest hermetyczny i posiada bezolejowy system łożyskowania. Ponieważ elementy generatora elektrycznego pracują w podwyższonych temperaturach, w artykule poruszono zagadnienia związane z wymaganiami stosowania zewnętrznego układu chłodzenia. W pracy przedstawiono wybrane wyniki badań mikroturbogeneratora parowego pracującego w instalacji ORC z czynnikiem niskowrzącym. Zamieszczono charakterystyki cieplno–przepływowe instalacji oraz omówiono warunki termodynamiczne jakie winny być spełnione podczas pracy ekspanderów parowych. Przedstawiono potencjalne zastosowanie małych kogeneratorów ORC z mikroturbinami parowymi w budowie układów elektroenergetycznych bazujących na OZE i cieple odpadowym.
    The article discusses issues related to the design of the new type of electric machines intended for operation in low power cogeneration systems. For the conversion of waste heat (coming from biomass combustion) to electricity, a microturbogenerator powered by a low-boiling medium’s vapour (HFE7100) was used. The high-speed turbogenerator with a nominal power of 2.5 kWe works in the ORC system which, in addition to generating electricity, enables heat production of 20 kW. A three-phase synchronous permanent magnet motor, with a maximum rotational speed of 80,000 rpm, is an integral part of the developed expansion machine. The designed and manufactured microturbogenerator has a hermetic structure and is equipped with an oil-free bearing system. Since some elements of the electric generator must be able to operate at elevated temperatures, this article raises issues related to the use of an external cooling system. This paper reports selected results from studies of the vapour microturbogenerator that operated in the ORC installation with HFE7100 as the working fluid. Thermal and flow characteristics of the installation are presented as well. Furthermore, thermodynamic conditions that should be met during operation of the vapour expanders are discussed. It was shown that small ORC cogeneration systems with vapour microturbines could be successfully applied in the construction of electricity systems that utilise renewable energy sources and waste heat.
    Źródło:
    Maszyny Elektryczne: zeszyty problemowe; 2018, 2, 118; 79--85
    0239-3646
    2084-5618
    Pojawia się w:
    Maszyny Elektryczne: zeszyty problemowe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Design analysis of ORC micro-turbines making use of thermal energy of oceans
    Autorzy:
    Piwowarski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/258880.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    Ocean Thermal Energy Conversion (OTEC) cycles
    organic Rankine cycle (ORC)
    low-boiling media
    steam turbines
    turbine design
    Opis:
    The article presents the results of the analysis of energy conversion cycles making use of thermal energy of oceans. The objects of analysis were two cases of closed Organic Rankine Cycle (ORC) power plants, which were: the cycle in which the vapour of the working medium was produced by warm oceanic water in the circum-equatorial zone, and the so-called “arctic” cycle in which this vapour was produced by non-frozen water in the circumpolar zone. Between ten and twenty low-boiling media were examined for which operating parameters were optimised to obtain the highest cycle efficiency. A preliminary design of an ORC turbine which was obtained by optimising basic design parameters is included. It has been proved that realisation of the Ocean Thermal Energy Conversion (OTEC) cycle is possible both in the warm and permanently frozen regions. The results of the calculations have also revealed that the efficiency of the OTEC cycle is higher in the circumpolar zone. Selecting a low-boiling medium and designing a highly efficient turbine operating in both abovementioned regimes is technically realisable.
    Źródło:
    Polish Maritime Research; 2013, 2; 48-60
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thermodynamic analysis of combined ORC-VCR system with recuperator and reheater
    Autorzy:
    Rawat, Kamal Singh
    Bhandari, Prabhakar
    Bisht, Vijay Singh
    Powiązania:
    https://bibliotekanauki.pl/articles/2142837.pdf
    Data publikacji:
    2022
    Wydawca:
    Centrum Badań i Innowacji Pro-Akademia
    Tematy:
    low grade energy
    organic Rankine cycle
    refrigeration
    hydrocarbons
    recuperator
    reheaters
    energia
    ORC
    organiczny obieg Rankine'a
    chłodzenie
    węglowodory
    rekuperator
    nagrzewnica
    Opis:
    The trend of utilization of low-grade thermal energy gain huge attention due to increase in energy demand and depletion of conventional resources of energy. Low grade energy can be used in ORC-VCR cycle for refrigeration purpose. In the present work, to improve the performance a modified ORC-VCR cycle, recuperator and reheater are integrated in the cycle. The thermodynamic analysis of the modified system has been conducted with R600a, R600, R290 and R1270 as working fluids under various operating conditions viz. evaporator temperature, condenser temperature, boiler exit temperature. Different parameters evaluated to assess the performance are overall COP, mass flow rate per kW cooling capacity, expansion ratio and compression ratio. From the analysis, butane is found as a best choice for the modified ORC–VCR cycle. It was found that for the modified ORC-VCR cycle at boiler exit temperature of 90°C and condenser temperature 40°C has system COP of 0.5542 with butane, which is 7.1% and 18% higher than that of ORC-VCR cycle with recuperator and simple ORC-VCR cycle, respectively.
    Źródło:
    Acta Innovations; 2022, 44; 34-44
    2300-5599
    Pojawia się w:
    Acta Innovations
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Selected technical problems of cogeneration of electric energy and heat
    Autorzy:
    Lampart, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/175508.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    cogeneration of electric energy and heat
    extraction-condensing turbine
    adaptive control
    distributed cogeneration
    organic Rankine cycle
    recovery heat
    Opis:
    The paper is focused on selected technical problems of cogeneration of heat and electric power (combined heat and power – CHP) both in a large and small scale. First, largescale cogeneration systems applied in large power industry are discussed and results of adaptive control of extraction condensing turbines are presented. Then, advantages of distributed cogeneration are pointed out and small-scale cogeneration systems aimed for modernisation of a fossil-fuel district heating plant are investigated. At the end of the paper, organic Rankine cycle (ORC) heat and power units are described for biomassfuelled cogeneration and topping of main generation units to use the recovery heat.
    Źródło:
    Transactions of the Institute of Fluid-Flow Machinery; 2015, 127; 137-152
    0079-3205
    Pojawia się w:
    Transactions of the Institute of Fluid-Flow Machinery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Exergetic Analysis of Hybrid Photovoltaic - Thermal Solar Collectors Coupled to Organic Rankine Cycles
    Analiza ekologiczna hybrydowego układu fotowoltaika - kolektory słoneczne związanych organicznym cyklem Rankine’a
    Autorzy:
    Pinto, C.
    Mady, C. E.
    Powiązania:
    https://bibliotekanauki.pl/articles/395979.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    exergy analysis
    Organic Rankine Cycle
    photovoltaic
    thermal collector PV
    solar thermal
    analiza egzergii
    cykl Rankine’a
    fotowoltaika
    kolektor PV/T
    energia słoneczna
    Opis:
    In this work, the application of hybrid solar modules that combine photovoltaic panels and solar thermal collectors coupled with a low-temperature thermal cycle such as the Organic Rankine Cycle is discussed, their main purpose being an increase in the total electric power production per available area. This work will study the thermal and electrical power production efficiency of the hybrid system, the increase in the PV module electric conversion efficiency due to their cooling through heat transfer to the thermal cycle and the total exergetic efficiency of the system. A simplified simulation of the system in steady state conditions based on a thermal efficiency model will be performed with the aid of the EES (Engineering Equation Solver) software using climate data from Campinas, São Paulo, Brazil. The study shows that while the PV/T+ORC system does fulfill the purpose of increasing the electrical power generation both from the generator coupled to the thermal cycle and from the increase in the PV module efficiency due to its cooling. Thus, there is an increase the overall exergy efficiency of the system compared to uncoupled PV/T collectors.
    W pracy omówiono zastosowanie hybrydowych modułów słonecznych łączących panele fotowoltaiczne z kolektorami słonecznymi w połączeniu z niskotemperaturowym cyklem termicznym, takim jak cykl organiczny Rankine'a, którego głównym celem jest zwiększenie całkowitej produkcji energii elektrycznej. W pracy zbadano wydajność produkcji energii cieplnej i elektrycznej w systemie hybrydowym, wzrost sprawności konwersji energii modułu fotowoltaicznego ze względu na ich chłodzenie poprzez przeniesienie ciepła do cyklu termicznego i całkowitą efektywność energetyczną układu. Uproszczona symulacja systemu w warunkach stanu ustalonego w oparciu o model sprawności cieplnej została przeprowadzona za pomocą oprogramowania EES (Engineering Equation Solver) wykorzystującego dane klimatyczne z Campinas, São Paulo, Brazylia. Badania wykazały, że system PV/T + ORC spełnia cel zwiększenia wytwarzania energii elektrycznej zarówno z generatora połączonego z cyklem termicznym, jak i ze wzrostu sprawności modułu PV ze względu na jego chłodzenie. W ten sposób zwiększa się ogólna efektywność egzergii systemu w porównaniu z niezwiązanymi kolektorami PV/T.
    Źródło:
    Civil and Environmental Engineering Reports; 2018, No. 28(4); 1-12
    2080-5187
    2450-8594
    Pojawia się w:
    Civil and Environmental Engineering Reports
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Performance optimization of organic Rankine cycles for waste heat recovery for a large diesel engine
    Autorzy:
    Ma, Z.
    Wu, J.
    Zhang, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/240064.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    low grade waste heat
    organic rankine cycle
    thermodynamic optimization
    thermoeconomic optimization
    intelligent marine diesel engine
    organiczny obieg Rankine'a
    optymalizacja termodynamiczna
    optymalizacja termoekonomiczna
    Opis:
    In order to recover the low grade waste heat and increase system fuel economy for main engine 10S90ME-C9.2-TII(part load, exhaust gas bypass) installed on a 10000 TEU container ship, a non-cogeneration and single-pressure type of waste heat recovery system based on organic Rankine cycle is proposed. Organic compound candidates appropriate to the system are analyzed and selected. Thermodynamic model of the whole system and thermoeconomic optimization are performed. The saturated organic compound vapor mass flow rate, net electric power output, pinch point, thermal efficiency and exergy efficiency varied with different evaporating temperature are thermodynamically analyzed. The results of thermodynamic and thermoeconomic optimization indicate that the most appropriate organic compound candidate is R141b due to its highest exergy efficiency, biggest unit cost benefit and shortest payback time.
    Źródło:
    Archives of Thermodynamics; 2018, 39, 1; 3-23
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A case study of working fluid selection for a small-scale waste heat recovery ORC system
    Autorzy:
    Klimaszewski, Piotr
    Zaniewski, Dawid
    Witanowski, Łukasz
    Suchocki, Tomasz
    Klonowicz, Piotr
    Lampart, Piotr
    Powiązania:
    https://bibliotekanauki.pl/articles/240748.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    waste heat recovery
    organic Rankine cycle
    ORC fluids
    heat exchangers
    turboexpander
    ciepło odpadowe
    odzysk ciepła
    ORC
    organiczny cykl Rankine'a
    wymienniki ciepła
    turboekspander
    Opis:
    The paper illustrates a case study of fluid selection for an internal combustion engine heat recovery organic Rankine cycle (ORC) system having the net power of about 30 kW. Various criteria of fluid selection are discussed. Particular attention is paid to thermodynamic performance of the system and human safety. The selection of working fluid for the ORC system has a large impact on the next steps of the design process, i.e., the working substance affects the turbine design and the size and type of heat exchangers. The final choice is usually a compromise between thermodynamic performance, safety and impact on natural environment. The most important parameters in thermodynamic analysis include calculations of net generated power and ORC cycle efficiency. Some level of toxicity and flammability can be accepted only if the leakages are very low. The fluid thermal stability level has to be taken into account too. The economy is a key aspect from the commercial point of view and that includes not only the fluid cost but also other costs which are the consequence of particular fluid selection. The paper discusses various configurations of the ORC system – with and without a regenerator and with direct or indirect evaporation. The selected working fluids for the considered particular power plant include toluene, DMC (dimethyl carbonate) and MM (hexamethyldisiloxane). Their advantages and disadvantages are outlined.
    Źródło:
    Archives of Thermodynamics; 2019, 40, 3; 159-180
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dual ORC-Brayton power system for waste heat recovery in heavy-duty vehicles
    Autorzy:
    Cholewiński, M.
    Pospolita, W.
    Błoński, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/224018.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    organic Rankine cycle
    Brayton cycle
    energy efficiency
    road transport
    waste heat utilization
    cykl Rankina
    cykl Braytona
    efektywność energetyczna
    transport drogowy
    wykorzystanie ciepła odpadowego
    Opis:
    Reducing the amount of energy required in industrial activities is one of the proven ways to achieve major cost savings, especially in the face of soaring energy prices. In the transport sector, besides the financial benefits, low energy consumption leads to the significant reduction of emissions of many pollutants. In this paper the new concept of dual power technology, dedicated to heavy road transport, was modelled and analysed by computer simulations. The combination of organic Rankine cycle and Brayton cycle was proposed, where the waste heat of fumes was recognized as a upper heat source, whereas the surrounding was adopted to be the lower one. Improvement of total energy conversion efficiency of the truck was the key success factor. Environmental friendly fluids (air and R123) were utilised. The operating parameters, power characteristics and energy streams (i.e. dispersion) of the system were evaluated, calculated and commented from the perspective of its theoretical profitability. The calculated net power capacity of analysed dual system was around 50 hp for 100% load. However, when the engine load is below 50% of nominal capacity, the power generation of combined system might be lower than in the case of single ORC system.
    Źródło:
    Archives of Transport; 2016, 39, 3; 7-19
    0866-9546
    2300-8830
    Pojawia się w:
    Archives of Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zastosowanie organicznego obiegu Rankine’a (ORC) zasilanego niskotemperaturowymi źródłami ciepła do produkcji energii elektrycznej
    Use of Rankine Organic Cycle (ORC) powered by low temperature heat sources for electricity production
    Autorzy:
    Kajurek, J.
    Rusowicz, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/271245.pdf
    Data publikacji:
    2017
    Wydawca:
    Centralny Ośrodek Badawczo-Rozwojowy Aparatury Badawczej i Dydaktycznej, COBRABiD
    Tematy:
    organiczny obieg Rankine’a
    ORC
    ciepło niskotemperaturowe
    ciepło odpadowe
    źródła ciepła
    czynniki robocze
    czynniki organiczne
    Organic Rankine Cycle
    low-temperature heat
    waste heat
    heat sources
    working fluids
    organic fluids
    Opis:
    Organiczny obieg Rankine’a to obiecująca technologia pozwalająca na wykorzystanie ciepła nisko- i średniotemperaturowego, którego źródłem mogą być procesy przemysłowe i odnawialne źródła energii, do produkcji energii elektrycznej. Istota jego pracy sprowadza się do pracy parowego obiegu Rankine’a z tą różnicą, że czynnikiem roboczym nie jest woda, a związek organiczny lub nieorganiczny, charakteryzujący się niską temperaturą przemiany fazowej. Artykuł przybliża podstawowe zagadnienia związane z instalacjami ORC: prezentuje ich zasadę działania, wskazuje różnice w stosunku do układów parowych, przybliża podstawowe właściwości czynników roboczych, charakteryzuje źródła ciepła i opisuje możliwości ich wykorzystania oraz analizuje rynek instalacji ORC.
    Organic Rankine Cycle (ORC) is a promising technology which allows utilizing low and middle temperature heat from industrial processes or renewable energy sources, to production electrical energy. The organic Rankine cycle works like a Clausius–Rankine cycle but uses organic working fluid with low boiling point instead of water. The article presents basics issues concerning ORC installations. It describes the principle of operation, presents the comparison with steam cycle, discusses the properties of working fluids, characterizes the heat sources giving examples of their usage, and analyzes current market of ORC installations.
    Źródło:
    Aparatura Badawcza i Dydaktyczna; 2017, 22, 3; 159-173
    2392-1765
    Pojawia się w:
    Aparatura Badawcza i Dydaktyczna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Perspektywy wykorzystania układów ORC przy niskotemperaturowej energii odpadowej
    Perspective of application the ORC systems at low temperature waste energy
    Autorzy:
    Weisser, P.
    Skotnicki, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/391907.pdf
    Data publikacji:
    2010
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Ceramiki i Materiałów Budowlanych
    Tematy:
    zarządzanie energią
    odzysk energii
    źródło energii
    energia niskotemperaturowa
    system ORC
    kierunek rozwoju
    energy management
    energy recovery
    energy source
    low temperature energy
    Organic Rankine Cycle system
    trend
    Opis:
    Od niedawna w Polsce coraz bardziej znana jest technologia wytwarzania energii elektrycznej i ciepła w tzw. układach ORC - Organic Rankine Cycle. Jego ideą i główną zaletą jest możliwość wykorzystania mediów zasilających układ o niskich temperaturach. Poza tym uniwersalność systemu pozwala na wykorzystaniu go nie tylko przy dedykowanych zastosowaniach w układach z kotłami na biomasę czy geotermii. ale także przy różnorakim systemie odzysku ciepła odpadowego z procesów przemysłowych i energetycznych, szczególnie ciepła niskotemperaturowego czy energii solarnej. W obecnej chwili na rynku istnieje wiele typoszeregów jednostek ORC. Wychodząc jednak w kierunku energii odpadowej niskotemperaturowej - należy zastanowić się nad granicą stosowalności tychże układów oraz nad możliwościami optymalizacyjnymi i projektowymi jednostek.
    Recently in Poland much more popular has became the electricity and heat technology called systems ORC (Organic Rankine Cycle). Idea and the main advantage of this system is the ability to use the media supply system with low temperatures. Additionally, the universality of this system allows to use not only for dedicated applications in systems boilers for biomass and geothermal, but also to the manifold system, waste heat recovery from industrial processes and energy, especially low temperature heat or solar energy. At this moment the market offer a lot of ranges ORC units models. However going to the direction of low temperature waste energy, we should think about the applicability of these systems as well as optimization and design capabilitie of this units.
    Źródło:
    Prace Instytutu Ceramiki i Materiałów Budowlanych; 2010, R. 3, nr 6, 6; 114-122
    1899-3230
    Pojawia się w:
    Prace Instytutu Ceramiki i Materiałów Budowlanych
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Możliwości wykorzystania układów ORC w przemyśle cementowym
    Possibilities of using ORC systems in cement industry
    Autorzy:
    Głodek-Bucyk, E.
    Sładeczek, F.
    Kalinowski, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/392213.pdf
    Data publikacji:
    2016
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Ceramiki i Materiałów Budowlanych
    Tematy:
    przemysł cementowy
    ciepło odpadowe
    wykorzystanie
    ORC
    cykl organiczny Rankina
    wypał klinkieru
    gaz odlotowy
    entalpia gazu
    cement industry
    waste heat
    utilization
    organic Rankine cycle
    clinker burning
    flue gas
    gas enthalpy
    Opis:
    W artykule przedstawiono analizę możliwości wykorzystania ciepła odpadowego do produkcji energii elektrycznej z układów wypalania klinkieru zlokalizowanych w Polsce. Ilość dostępnego ciepła odpadowego uzależniona jest od zapotrzebowania ciepła w procesach suszenia surowców i paliw. Poziom wykorzystania entalpii gazów odlotowych w cementowniach waha się w graniach od 63 do 100%, natomiast dla powietrza nadmiarowego wynosi od 0 do 100%. Dla analizowanych instalacji wypalania klinkieru łączna moc turbozespołów wyniesie ok. 27,5 MWel, natomiast roczna produkcja energii elektrycznej wynosi potencjalnie 177 GWh.
    The paper presents an analysis of using waste heat for electricity production in clinker burning systems. The quantity of available waste heat depends on the heat demand in the raw materials and fuels drying process. The level of use of the enthalpy of exhaust gases varies from 63 to 100%, whereas the excess air is from 0 to 100%. Total turbine power will be approx. 27,5 MWel for the analyzed system clinker burning. While the annual electricity production is potentially 177 GWh.
    Źródło:
    Prace Instytutu Ceramiki i Materiałów Budowlanych; 2016, R. 9, nr 27, 27; 26-34
    1899-3230
    Pojawia się w:
    Prace Instytutu Ceramiki i Materiałów Budowlanych
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wykorzystanie energii geotermalnej w mieście Buk
    The use of geothermal energy in the city of Buk
    Autorzy:
    Zimny, Jacek
    Struś, Mieczysław
    Szymiczek, Jakub
    Szczotka, Krzysztof
    Powiązania:
    https://bibliotekanauki.pl/articles/27323741.pdf
    Data publikacji:
    2023
    Wydawca:
    STE GROUP
    Tematy:
    geotermia
    elektrociepłownia geotermalna
    ciepłownia geotermalna
    ORC
    Kalina
    sprężarkowe pompy ciepła dużej mocy (SPCDM)
    dublet geotermalny
    geothermal energy
    geothermal CHP plant
    geothermal heat plant
    organic Rankine cycle
    high power compressor heat pumps
    geothermal doublet
    Opis:
    Artykuł przedstawia projekt wykorzystania potencjalnych zasobów geotermalnych w mieście i gminie Buk. W pierwszych rozdziałach przedstawione są warunki geotermalne dla analizowanego regionu oraz potencjalne zbiorniki geotermalne umożliwiające efektywną eksploatacje wód termalnych. W mieście Buk są to zbiorniki jury dolnej, triasu dolnego oraz permu dolnego. Przedstawiona została głębokość technologia wykonania dwuotworowego systemu dubletu geotermalnego. W kolejnych rozdziałach przedstawione są technologie sprężarkowych pomp ciepła umożliwiające maksymalizację wykorzystania ciepła geotermalnego. Na zakończenie przedstawione są potencjalne moce cieplne uzyskane z odwiertu i potencjalny efekt ekologiczny.
    The paper presents the potential use of geothermal resources in the town and municipality of Buk. The first chapters present the geothermal conditions for the analyzed region and the potential geothermal reservoirs for the efficient exploitation of thermal water. In the town of Buk, these are the Lower Jurassic, Lower Triassic and Lower Permian reservoirs. The technology of a two-hole geothermal doublet system is presented. In the following chapters, compressor heat pump technologies for maximizing the use of geothermal heat are presented. Finally, the potential heat capacities obtained from the borehole and the potential environmental effect are presented.
    Źródło:
    Systemy Wspomagania w Inżynierii Produkcji; 2023, 12, 1; 129-136
    2391-9361
    Pojawia się w:
    Systemy Wspomagania w Inżynierii Produkcji
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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