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Performance characteristics of HCFC‐123 ejector refrigeration cycles
Author(s) -
Sun DaWen,
Eames Ian W.
Publication year - 1996
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/(sici)1099-114x(199610)20:10<871::aid-er201>3.0.co;2-4
Subject(s) - refrigeration , injector , coefficient of performance , regenerative heat exchanger , mechanical engineering , cooling capacity , nuclear engineering , process engineering , thermal , engineering , environmental science , thermodynamics , automotive engineering , heat pump , heat exchanger , physics
Ejector refrigeration systems can use low grade thermal energy, at temperatures as low as 60°C, to provide space cooling. Since this waste energy is widely available and the cost of its supply is negligible in many cases, cooling costs can be lower than conventional systems, which makes the method very attractive. The present study describes a computer simulation model for ejector refrigeration systems that was developed using an existing ejector theory. This model allows for internal irreversibilities within the ejector to be included and caters for the addition of a regenerator and a precooler for improving the system coefficient of performance. The study shows that HCFC‐123 is a suitable replacement for CFC‐11 in this application. Results also indicate that the use of a variable geometry ejector can maintain the optimum performance of refrigeration systems when operating conditions change.