Temat: strumienica dwufazowa - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Exergy analysis of operation of two-phase ejector in compression refrigeration systems
Autorzy:: Dudar, A.
Butrymowicz, D.
Śmierciew, K.
Karwacki, J.
Powiązania:: https://bibliotekanauki.pl/articles/240804.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: two-phase ejector
compression refrigeration system
COP
exergy
strumienica dwufazowa
egzergia
Opis:: Paper deals with theoretical analysis of possible efficiency increase of compression refrigeration cycles by means of application of a two-phase ejector. Application of the two phase ejector in subcritical refrigeration system as a booster compressor is discussed in the paper. Results of exergy analysis of the system operating with various working fluids for various operating conditions have been shown. Analysis showed possible exergy efficiency increase of refrigeration compression cycle.
Źródło:: Archives of Thermodynamics; 2013, 34, 4; 107-122
1231-0956
2083-6023
Pojawia się w:: Archives of Thermodynamics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Performance characteristics of low global warming potential R134a alternative refrigerants in ejector-expansion refrigeration system
Autorzy:: Mishra, S.
Sarkar, J.
Powiązania:: https://bibliotekanauki.pl/articles/240184.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: eco-friendly refrigerant
two-phase ejector
optimization
COP
area ratio
critical temperature
ekologiczny czynnik chłodniczy
strumienica dwufazowa
optymalizacja
stosunek powierzchni
temperatura krytyczna
Opis:: Performance assessment of ejector-expansion vapor compression refrigeration system with eco-friendly R134a alternative refrigerants (R152a, R1234yf, R600a, R600, R290, R161, R32, and propylene) is presented for air-conditioning application. Ejector has been modeled by considering experimental data based correlations of component efficiencies to take care of all irreversibilities. Ejector area ratio has been optimized based on maximum coefficient of performance (COP) for typical air-conditioner operating temperatures. Selected refrigerants have been compared based on area ratio, pressure lift ratio, entrainment ratio, COP, COP improvement and volumetric cooling capacity. Effects of normal boiling point and critical point on the performances have been studied as well. Using ejector as an expansion device, maximum improvement in COP is noted in R1234yf (10.1%), which reduces the COP deviation with R134a (4.5% less in basic cycle and 2.5% less in ejector cycle). Hence, R1234yf seems to be best alternative for ejector expansion system due to its mild flammability and comparable volumetric capacity and cooling COP. refrigerant R161 is superior to R134a in terms of both COP and volumetric cooling capacity, although may be restricted for low capacity application due to its flammability.
Źródło:: Archives of Thermodynamics; 2016, 37, 4; 55-72
1231-0956
2083-6023
Pojawia się w:: Archives of Thermodynamics
Dostawca treści:: Biblioteka Nauki

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