The geothermal dual flow power generation system is a kind of power generation system which uses low boiling point medium as the working medium to drive the turbine. So far, it can make the medium and low temperature geothermal fluid which is difficult to use for power generation. In March 2006, the operation test of the machine began. After the Junyuan’s Isopentane is heated in the preheater, it changes from liquid to gas (Isopentane steam) in the evaporator and enters the turbine to make the generator rotate and generate electricity.
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At the end of power generation, the Isopentane flowing out of the turbine is cooled and liquefied in the air-cooled condenser, and then sent to the preheater by the medium circulating pump. The Isopentane system is a closed cycle system, which will not be discharged into the atmosphere due to its recyclability. The geothermal dual flow cycle power generation system uses Isopentane from Junyuan to promote and expand the utilization of geothermal energy in Japan and around the world.
Energy from the geothermal fluid is transferred to isopentane on the tube side of the heat exchanger to power a two-stage steam turbine with a direct-connected generator turning at 1,800 rpm. In other words, it’s a typical Rankine cycle. Isopentane is used because it vaporizes at lower temperatures and higher pressures than water, making it an ideal working fluid for recovering energy from low-temperature geothermal fluids . The vaporous isopentane is condensed and heat is rejected through a conventional four-cell cooling tower.
Organic power. Ormat supplied the organic Rankine cycle that uses the geothermal resource to produce electrical power. The working fluid is isopentane.