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5. Heat pumps Qin Expansion valve Qout Fig. 5.18. The process of absorption in an absorption heat pump (Source: own elaboration) Compare the functioning of the absorption heat pump (Fig. 5.18) with the compression heat pump (Fig. 5.3). The absorption cooling cycle is a combination of two processes, as shown in Fig. 5.19. QH QI 1 3 2 generator absorber generator condenser QI absorber evaporator QL Fig. 5.19. Abso1r-ptiopnurmefpri,g2e,ra3ti-oenxcpyaclnes:i1on–vpaulmvep,, Q2,L3,Q–I,eQxHp-anloswio,nivnatelvrem, QedL,iaQtIe, QanHd–hliogwh, tienmteprmereadtuiarte haenadthsioguhrtcems perature heat sources (Source: own elaboration) Absorption cooling cycle changes the heat by three external sources; low QL, intermediate QI and high QH temperature scale. The high temperature source heat QH is used for running the absorption system. For the refrigerator, the useful heat QL transfer is at a low temperature, for the heat pump at an intermediate QI temperature. Since the separation process in the generator takes place at a higher pressure than the absorption process in the absorber, the circulation of the solution requires a circulation pump (Fig. 5.19, pos. 1). The working fluid in absorption refrigeration systems is a binary solution made up of a refrigerant and an absorbent. High temperature heat QH is supplied to the generator tank to remove the refrigerant from the solution. The performance of absorption systems is highly dependent on 169 Evaporator CondenserPDF 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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