An analysis is performed to find the optimum coefficient of performance of three models of a vapor adsorption heat pump, namely, a basic cycle with no regeneration, a cycle with cocurrent-flow regenerative heating, and a cycle with countercurrent-flow regenerative heating. Nonlinear optimization techniques are employed to find the best operating conditions within a range of temperatures. The results for the three model cycles are computed for the water and Zeolite-NaX pair and compared to those for an equivalent 3-T Carnot device. The usefulness of thermodynamic cycle optimization as a preliminary step to performing more detailed thermal analyses is discussed.

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