The development of highly efficient heat pumps with new refrigerants and a demand-meeting differential heat output

In the following the development of a new generation of heat pumps is introduced, that is characterized by a more efficient cycle allowing a reduction of the specific energy consumption. Essentially there are two reasons requiring this development: 1. In the new Heat Demand Decree being in force in Germany lower values for the annual space heat demand are laid down. They are gained by an improved heat insulation, the use of heat recovery facilities and solar architecture. The annual heat demand for the production of hot potable and service water will remain nearly constant. 2. In Germany heat pumps are mainly used for space heating, the heat is extracted at a low temperature level. This allows a high efficiency by condensation at low temperatures. The potable and service water is heated up by a separat device such as electrical regenerative heater, continuous-flow water heater and separat heat pump. (orig.)SIGLEAvailable from TIB Hannover: DtF QN1(49,2) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie, Bonn (Germany)DEGerman