4.72 hp/ton

10 r on

12,000 Btu/h 10

The total heat rejected from the refrigeration cycle (Qout) equals the rate of heat removal (or load) plus the work input (vapor compression cycle) or high-temperature heat input (absorption cycle) computed as follows:

In the above example, the total heat rejected from the cycle would be 12,000 Btu/h (3.515 kWr), which was the heat removal rate, plus 1,200 Btu/h (0.352 kWJ), which was the work energy required, for a total rate of 13,200

Energy Efficiency Ratio

Energy Efficiency Ratio (EER) is a term used in the United States to quantify the efficiency of electric-driven refrigeration systems. EER is defined as:

Refrigerant effect (i„ Btu/h)

Work input (in watts) (Btu/watt-h)


This leads to the following convenient relationships:

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