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3 – Theoretical Background and System Analysis Only the tripartite gas cooler configuration (d) has been further analysed, since it is capable of producing high-temperature DHW and contributes to the highest possible COP for the CO2 heat pump unit. 3.2.4 Application of a Tripartite Gas Cooler 3.2.4.1 Principle System Design Figure 3.10 shows a possible design for an integrated CO2 heat pump unit equipped with a counter-flow tripartite gas cooler for preheating of DHW (A), low-temperature space heating (B) and reheating of DHW (C). SUCTION GAS HX COMPRESSOR LPR a b c d GAS COOLER (C) Reheating DHW Space heating Preheating DHW Oil return GAS COOLER (B) Heat source Figure 3.10 EVAPO- RATOR BACK-PRESSURE VALVE GAS COOLER (A) Principle of an integrated CO2 heat pump unit for com- bined space heating and heating of DHW. A low pressure receiver (LPR) system in combination with an automatic back-pressure valve can be used to control the supercritical pressure (ref. Appendix A2.2, Methods of Controlling the High-Side Pressure). The main purpose of the suction gas heat exchanger is to evaporate any CO2 liquid from the oil return system and thus prevent liquid slugs in the compressor. The gas cooler units A and C are connected to a DHW system, which is described and analysed in Section 3.3. Gas cooler unit B is a water-cooled counter-flow heat exchanger, which is connected to a low-temperature hydronic heat distribution system with radiant floor heating, convectors or fan-coils. 38PDF Image | Residential CO2 Heat Pump System for Combined
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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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