Coefficient Of Performance Of Refrigerator Q Cold W In
Coefficient Of Performance Of Refrigerator Q Cold W In — the NEET Physics formula with its derivation, variables, validity constraints and worked solver.
Coefficient of Performance of Refrigerator (α = Q cold / W in) Applies to refrigerators and air conditioners operating in a thermodynamic cycle. Define the goal of a refrigerator: remove heat Q cold from a cold region. Define the cost: work input W in required to drive the cycle. Define performance (COP or alpha) as the ratio of Benefit/Cost = Q cold / W in. W in > 0 (Work must be supplied) Q cold >= 0 Thinking COP cannot be greater than 1 (unlike thermal efficiency, COP is often > 1). Confusing the heat rejected to the hot reservoir (Q hot) with the heat removed (Q cold) in the numerator. Assuming COP depends only on temperatures (this is only true for the ideal Carnot refrigerator).