HEAT-TRANSFER EFFECT ON THE SPECIFIC COOLING LOAD OF REFRIGERATORS

The maximum possible specific cooling load that can be obtained from t wo-heat-reservoir refrigerators with a set of high-temperature heat si nks and low-temperature heat sources is analyzed. The refrigerators co nsidered in this paper include (1) externally and internally reversibl e, (2) externally irreversible and internally reversible, (3) external ly reversible and internally irreversible and (4) externally and inter nally irreversible refrigerators. The irreversibilities are assumed to be caused by heat transfer only. The specific cooling load, defined a s the cooling load per unit total heat-exchanger surface area, is adop ted as the objective function for the refrigerator performance analysi s in this paper.