期刊
INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID
卷 93, 期 -, 页码 122-131出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ijrefrig.2018.06.017
关键词
Ejection refrigeration system; IHX position; COP; Irreversibilities
This paper presents the theoretical analysis of the influence of an internal heat exchanger (IHX) position, on an ejection-compression refrigeration system. The energy and the exergy performance are discussed by placing an IHX in two different positions: 1) Promoting the superheating in the compressor suction EC + IHX-1 and 2) promoting superheating in the suction nozzle EC + IHX-2, which is a novel configuration proposal. Both configurations are compared under air climatization conditions using the refrigerants R134a, R1234ze(E) and R290. The results show that the exergy efficiency is higher when EC + IHX-2 is used for an IHX effectiveness below 60%, and lower irreversibilities occur in the ejector with this configuration for an effectiveness value of IHX below 40%. In both cases, IHX presence promotes a decrease in the coefficient of performance. (c) 2018 Elsevier Ltd and IIR. All rights reserved.
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