Dw. Sun et Iw. Eames, PERFORMANCE-CHARACTERISTICS OF HCFC-123 EJECTOR REFRIGERATION CYCLES, International journal of energy research, 20(10), 1996, pp. 871-885
Ejector refrigeration systems can use low grade thermal energy, at tem
peratures as low as 60 degrees C, to provide space cooling. Since this
waste energy is widely available and the cost of its supply is neglig
ible in many cases, cooling costs can be lower than conventional syste
ms, which makes the method very attractive. The present study describe
s a computer simulation model for ejector refrigeration systems that w
as developed using an existing ejector theory. This model allows for i
nternal irreversibilities within the ejector to be included and caters
for the addition of a regenerator and a precooler for improving the s
ystem coefficient of performance. The study shows that HCFC-123 is a s
uitable replacement for CFC-11 in this application. Results also indic
ate that the use of a variable geometry ejector can maintain the optim
um performance of refrigeration systems when operating conditions chan
ge.