Method of operating an absorption heat pump or refrigerator, and an absorption heat pump or refrigerator

摘要

A method of operating an absorption heat pump or refrigerator consisting at least of a refrigerant circuit and a refrigerant-containing solution circuit, with a generator for evaporating refrigerant from the solution with the supply of relatively high-temperature heat, a condenser for condensing refrigerant and giving up heat at an intermediate temperature level, an evaporator for evaporating refrigerant with the absorption of heat from a relatively cold heat source, a heat exchanger for transferring heat from the liquid passing out of the condenser to the refrigerant vapor and liquid coming from the evaporator, an absorber for absorbing refrigerant vapor into the solution with the giving-up of heat at an intermediate temperature level, and means for circulating the solution or maintaining the pressure, wherein the delivery of refrigerant is regulated in such a manner that the temperature differential DELTA tw between the liquid entering the heat exchanger on the condenser side and the liquid and vapor leaving the heat exchanger on the absorber side substantially coincides with the temperature differential DELTA tk between the liquid passing out of the heat exchanger on the evaporator side and the liquid and vapor entering the heat exchanger on the evaporator side. This four-temperature control system is very effective and results in an increase of the power of the apparatus. The invention further relates to an apparatus constructed to fulfill the above operating conditions.