Experimental investigation of an ejector refrigerator: Effect of mixing chamber geometry on system performance

This paper describes an experimental study of an ejector refrigeration cycl e using R11 as the working fluid. The system was tested with boiler tempera ture from 100 to 110 degreesC, the condenser temperature from 35 to 41 degr eesC, and the evaporator temperature up to 12 degreesC. Two different mixin g chambers with throat diameter of 8 mm were used. Choking of the fluid was always found in the first mixing chamber, but not in the second one. The s ystem was more flexible to operate when there was no choking in the mixing chamber. A cooling temperature as low as - 5 degreesC could be obtained wit h COP between 0.1 and 0.25 and cooling capacity between 500 and 1700 W. Cop yright (C) 2001 John Wiley & Sons, Ltd.