Abstract
Geothermal steam turbine design and construction is based on conventional turbine design. However there are significant differences, mainly due to the special characteristics of geothermal steam which contains many impurities such as non-condensable gases (e.g. CO 2 and H 2 S) and solid particles (e.g. SiO 2 , CaCO 3 and Fe) and low available energy ( T < 300° C and P < 8 bar ) at the turbine inlet. The adverse conditions of geothermal steam make necessary modifications to some design considerations as well as construction and operational features different from conventional fossil-fuelled steam turbines.
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