An overall isentropic efficiency of 25% has been reported by
some of the authors in a 2 kWe ORC unit [89].
Reid [90] reports a pump efficiency of 7% on kW-scale ORC
cycle using HFE-7000;
Quoilin [91] obtained a 22% efficiency on a diaphragm pump
using RHFC-245fa.
Bala et al. [92] studied the influence of different working
fluids on the overall efficiency of sliding-vane refrigerant
pumps; the highest reported efficiency was about 20%.
Melotte [88] performed an experimental study on a centrifugal
pump working with solkatherm, and obtained an effi-
ciency varying between 10% and 20%.
Not