Journal
RENEWABLE ENERGY
Volume 55, Issue -, Pages 331-337Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.renene.2012.12.029
Keywords
Vapor compression cycle; Ejector-cooling cycle; Combined refrigeration cycle; Air-cooled condenser; Sub-cooling; Performance evaluation
Funding
- National Research Foundation of Singapore [NRF2008EWT-CERP002-010]
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This paper describes the development of a combined ejector-vapor compression cycle (EVCC) that uses working fluid R134a and air-cooled condensers for both sub-cycles. A large amount of experiments have been conducted to test the influence of the evaporating, generating and condensing temperatures of the ejector sub-cycle (ESC) on the performances of EVCC. The test results show that (1) the performance of the combined cycle is very sensitive to the three temperatures of ESC; (2) the variation of the degree of sub-cooling at the vapor compression sub-cycle (VCSC) is similar to that of COP improvement at EVCC over VCSC; and (3) this system with certain operating conditions results in relatively high COP improvements (15.9-21.0%). (C) 2013 Elsevier Ltd. All rights reserved.
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