STEAM-TURBINE PLANT FOR GEOTHERMAL POWER STATION Russian patent published in 2005 - IPC

FIELD: power engineering.

SUBSTANCE: proposed steam-turbine plant for geothermal power station includes primary circuit consisting of geothermal circulation system and secondary circuit consisting of steam-turbine plant cycle. To increase thermodynamic efficiency of utilization of geothermal waters, plant is furnished additionally with evaporator, heat exchanger, gas-expansion machine and circulating pump. Mass flow rate of working medium getting into primary interwell heat exchanger greatly exceeds flow rate of medium circulating in steam turbine plant circuit. Working medium heated to saturation temperature is divided on surface into two flows. First flow gets into evaporator and further on into turbine and condenser, second flow is directed into heat exchanger whereto cooling water is directed from condenser for heating. Said water, after heating, is fed to low-potential heat consumers.

EFFECT: increased efficiency of power cycle at maximum decrease of temperature of waste thermal water.

1 dwg