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Gordon Powell |
Positive displacement compressors with vapor injection are commonly used in the vapor compression cycle to increase the refrigeration effect of evaporators or the heat rejection of a condenser. It is important to characterize injection flow just like the suction flow in order to allow system designer to size the components of HVAC equipment. This seminar presents a method to characterize compressors with vapor injection. The method is based on the AHRI 10-coefficient model with the addition of another independent and dependent variable. The accuracy of the method will be presented and its effect on the number of test points required.