A timely and comprehensive introduction to CO2 heat pump theory and usage * A comprehensive introduction of CO2 application in heat pump, authored by leading scientists in the field * CO2 is a hot topic due to concerns over global warming and the 'greenhouse effect'. Its disposal and application has attracted considerable research and governmental interest * Explores the basic theories, devices, systems and cycles and real application designs for varying applications, ensuring comprehensive coverage of a current topic * CO2 heat transfer has everyday applications including water heaters, air-conditioning systems, residential and commercial heating systems, and cooling systems