PERFORMANCE OF A THERMODYNAMIC WATER PUMP

A mathematical model for a thermodynamic pump capable of lifting water by temperature difference has been developed. The model has been test ed experimentally by designing a pump which had no moving parts. The p ump was operated by the temperature difference of a condenser (5-15 de grees C) and a boiler (30-50 degrees C). The pump performance was favo urably compared with the model and pump output under these conditions was 0.8 W (when 120 kg/hr water was lifted 2.5 m). The pump efficiency was rather low, however, the main advantage of such a pump is the abs ence of moving parts and direct contact between water and the working fluid.