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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:
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:
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:
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:
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:
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:
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:
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:
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:
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:
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:
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:
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:
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:
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
Wyświetlanie 1-15 z 30

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