Geosun founded in 1997, is specialized in the development of thermal energy such as solar, geothermal renewable energy sector, engineering, a high-performance, recycling the input power applied to the heat pump instead of the expansion valve since 2001, developed the world&＃039;s first high-efficiency expansion turbine. you want to define a new concept for heating, cooling and hot water production through the expansion turbine is applied to improve the technology for the expansion turbine and heat pump.