Abstract
In this paper, the thermodynamic investigation on the use of geothermal
water (130°C as maximum) for power generation through a basic Rankine has
been presented together with obtained main results. Six typical organic
working fluids (i.e., R245fa, R141b, R290, R600, R152a, and 134a) were
studied with modifying the input pressure and temperature to the turbine.
The results show that there are no significant changes taking place in the
efficiency for these working fluids with overheating the inlet fluid to
the turbine, i.e., efficiency is a weak function of temperature. However,
with the increasing of pressure ratio in the turbine, the efficiency rises
more sharply. The technical viability is shown of implementing this type
of process for recovering low temperature heat resource.
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