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Wyszukujesz frazę "Rankine cycle" wg kryterium: Temat


Wyświetlanie 1-3 z 3
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 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:
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
    Wyświetlanie 1-3 z 3

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