Rodatherm Energy wants to make geothermal more efficient, but will it be cheaper?

Rodatherm Energy emerged from stealth with $38 million in Series A funding. It plans to build a closed-loop geothermal power plant that uses refrigerants to move heat to the surface.​ ​Rodatherm Energy emerged from stealth with $38 million in Series A funding. It plans to build a closed-loop geothermal power plant that uses refrigerants to move heat to the surface.