A small solar (thermal) water pump prototype was tested. The pump work
s on an organic Rankine cycle using refrigerant R113. The design of th
e pump is described. Detailed temperature and pressure measurements of
the working fluid for different operating conditions are performed. T
he behaviour of the cycle is analysed to get a clear picture of the th
ermodynamic process. Power-characteristic curves are obtained by a sys
tematic variation of water temperature, pumping head and heat input. C
opyright (C) 1996 Elsevier Science Ltd.