Physics

Physics

Problem

Which of the following expresses the correct relation between the coefficient of performance of a heat pump (COPHP\text{COP}_{\mathrm{HP}}) and that of a refrigerator (COPref\text{COP}_{\mathrm{ref}}) working between the same two temperature reservoirs? a) COPHP=1COPref\text{COP}_{\mathrm{HP}} = \dfrac{1}{\text{COP}_{\mathrm{ref}}} b) COPHP=COPref−1\text{COP}_{\mathrm{HP}} = \text{COP}_{\mathrm{ref}} - 1 c) COPHP=COPref+1\text{COP}_{\mathrm{HP}} = \text{COP}_{\mathrm{ref}} + 1 d) COPHP=COPref\text{COP}_{\mathrm{HP}} = \text{COP}_{\mathrm{ref}}

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