Energy Solutions: A Heat Pump Using Carbon Dioxide as the Refrigerant
These concerns with HCFC and HFC refrigerants have led Light-emitting diode. Illumination technology that produces light by running electrical current through a semiconductor diode. LED lamps are much longer lasting and much more energy efficient than incandescent lamps; unlike fluorescent lamps, LED lamps do not contain mercury and can be readily dimmed. to interest in other chemicals that can be used as refrigerants, one of which is carbon dioxide (CO2). The Japanese have focused considerable attention on CO2-based heat pumps, and one Japanese company, Mayekawa , has been selling commercial-scale CO2-based heat pumps in North America for several years.