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5. Heat pumps that emits heat QI. The heat of the generator is used to heat the solution from the absorber, then the heat Ql is rejected from the absorber. The high temperature heat at the generator is released at the absorber and the condenser. In order to improve the coefficient of performance COP, heat exchange HX is inserted as shown in (Fig. 5.20). The heat exchanger allows the solution from the absorber to be preheated before entering the generator. In this way part of the heat is returned. The heat input to the generator is less than the size of the generator and can be smaller. The COP can be increased by up to 60%. QH generator HX 1 2 QI QL condenser QI 3 absorber Fig. 5.20. Single-effect absorption system: 1 – pump, 2, 3 – expansion valve, HX – heat exchanger, QL, QI, QH – low, intermediate and high temperature heat sources (Source: own elaboration) 1-pump,2, 3 - expansion valve, HX- heat exchanger, QL,QI,QH- low, intermediate and high temperature heat sources Absorption heat transformer. This system uses heat from the intermediate temperature sources Ql and discards heat QL at a low temperature level. The useful heat QH output is obtained at the highest temperature level. Using an absorption heat transformer, any amount of waste heat Ql can be increased to a higher temperature level QH without any other heat source, except for some work required for the working fluid to flow. QH QI evaporator absorber evaporator QI condenser QL HX 1 2 generator 3 Fig. 5.21. Absorption heat transformer system: 1 – pump, 2, – expansion valve, 3 – pump, HX – heat exchanger, QL, QI, QH – low, 1-pump, 2, - expansion valve, 3- pump, HX- heat exchanger, QL,QI,QH- low, intermediate and high temperature intermediate and high temperature heat sources (Source: own elaboration) heat sources 171PDF Image | Heat Pumps 978-83-65596-73-4
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CO2 Organic Rankine Cycle Experimenter Platform The supercritical CO2 phase change system is both a heat pump and organic rankine cycle which can be used for those purposes and as a supercritical extractor for advanced subcritical and supercritical extraction technology. Uses include producing nanoparticles, precious metal CO2 extraction, lithium battery recycling, and other applications... More Info
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