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    Wyświetlanie 1-4 z 4
    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:
    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:
    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:
    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
      Wyświetlanie 1-4 z 4

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