Geothermal Recovery System Using Natural CO₂ as A Heat Transfer Fluid

-2nd Report: Water Thermal Recovery-

Abstract

Our previous report showed that the geothermal recovery system utilizing CO₂ latent heat has higher ability per unit length of geothermal piping than conventional system utilizing liquid anti-freezer sensible heat. And for the same heat exchange performance, it enables to promote downsize of the diameter or the length of heat recovery piping and reduction of the electric consumption. In this study, a water storage tank was used as a heat source. Cold and hot water was made utilizing CO₂ latent heat from water thermal in a water storage tank. As a result, the water thermal system utilizing only 2 m thermal piping exerted the same ability with the geothermal system utilizing 50 - 100 m geothermal piping.