Abstract
Thermodynamic analysis has been carried out in detail, to predict the performance of a solar thermal water pump working at different discharge heads. It is shown that the heating time of the working fluid and the condensation time of the spent vapour play an important role in determining the number of cycles that a pump can perform in a day. The heating time in turn depends on the amount of working fluid being loaded in the system initially. Similarly, it is observed that an optimal cooling coil area dictates the effective condensation time. Hence, in the present work, an optimum design has been outlined for a solar thermal water pump, both in terms of the amount of the working fluid to be loaded in the system and the optimum cooling coil area.
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