This paper presents the description and operation of a solar-powered therma
l water pump with ethyl ether as the working fluid. A simple flat-plate col
lector with an exposed area of 1 m(2) is employed to pump water ranging fro
m 700-1400 l/day depending upon the lift (6-10 m). Such a pumping system co
uld achieve efficiency of about 0.42-0.34%. (C) 2000 Elsevier Science Ltd.
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