Abstract: Process for storing heat and for upgrading its temperature, in which a working substance is expelled from an absorbing substance by means of heat of a predetermined intermediate temperature range, the vapor of the working substanced generated during the expulsion step being condensed at a comparatively low temperature and the condensed working substance being evaporated in the intermediate temperature range and being absorbed in the absorbing substance under an increased pressure and at a relatively high temperature while generating heat of absorption, in which a zeolite is used as the absorbing substances and water is used as the working substance.

Abstract: In a system with at least one absorption heat pump, a working medium is generated in a generator or explusion unit by the input of heat energy of relatively high temperature, from an absorption material. The generated working medium is condensed in a condenser and then undergoes expansion in an expansion unit. The expanded, condensed working medium is evaporated in an evaporator with the input of heat energy at a relatively low temperature and the evaporated working medium is absorbed again, in an absorber, in the absorption material. The heat energy, used for generation of the working medium from the absorption material, is so stored for the heat pump that the heat energy, as taken from the store, is on hand at a temperature which is high enough for the generation of working medium from the absorption material.The heat store may preferably take the form of a sorption store, comprising a zeolite as sorption material and forming a part of a further discontinuously operated absorption heat pump.