Refrigeration – Processes – Evaporation induced by sorption
Patent
1985-01-31
1985-12-31
King, Lloyd L.
Refrigeration
Processes
Evaporation induced by sorption
622383, 623242, 62476, F25B 1500
Patent
active
045612595
ABSTRACT:
A method of operating a bimodal heat pump is provided, such heat pump operating in a first mode as an absorption heat pump and in a second mode as a device for indirectly heating a heat-transport medium. This procedure comprises in the first mode heating by heat exchange a generator containing a solution of a working medium in a solvent to separate a part of the dissolved working medium in the gaseous state from the solvent, passing the separated gaseous working medium to a condenser for liquefaction by the giving up of thermal energy to the heat-transport medium, thereafter expanding and evaporating the liquefied working medium in an evaporator by the taking up of thermal energy from the environment, passing the evaporated working medium to an absorber for solution in the solvent while giving up thermal energy to the heat-transport medium, and passing another part of the working medium-solvent solution from the generator to the absorber while pumping working medium-solvent solution from the absorber to the generator. The procedure also comprises in the second mode indirectly heating by heat exchange all the heat-transport medium in a heat boiler separate from the generator. The procedure further comprises, in switching over from the first mode to the second mode, discontinuing the heating of the generator, discontinuing the pumping of the working medium-solvent solution between the absorber and the generator, and diverting all the heat-transport medium to and through the heat boiler for indirect heating by heat exchange therein. In addition, the procedure comprises, in switching back from the second mode to the first mode, restarting the heating of the generator and the pumping of the working medium-solvent solution, and discontinuing passing the heat-transport medium through the heat boiler.
REFERENCES:
patent: 4312476 (1982-01-01), Pohlmann
patent: 4394959 (1983-07-01), de Vries
patent: 4448596 (1984-05-01), van der Sluys et al.
King Lloyd L.
Schneider Rolf E.
U.S. Philips Corporation
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