Features Geothermal
R717 and R600 more efficient in geothermal heat pumps, study finds

Iran – In a new study of geothermal heat pumps published in The Journal of Renewable and Sustainable Energy, systems using ammonia (R717) or n-butane (R600) were found to be more efficient than those employing R22 or R134, as well as more economical. Hydrocarbons21 reports. | READ MORE