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J. Sarkar et al. / Energy Conversion and Management 46 (2005) 2053–2067 2055 Nomenclature cpw d E f Gr h I L m_ ref m_ evw m_ gcw Q Re Rel s T T0 Tevw Tgcw Thexr UA x DP Greeks q gex water specific heat, kJ kg1 K1 diameter of tube, m exergy, W friction factor refrigerant mass velocity, kg m2 s1 specific enthalpy, kJ kg1 irreversibility, W length of tube, m refrigerant mass flow rate, kg s1 water mass flow rate in evaporator, kg s1 water mass flow rate in gas cooler, kg s1 heat transfer rate, W Reynolds number Reynolds number for saturated liquid specific entropy, kJ kg1 K1 temperature, K ambient temperature, K mean temperature of water in evaporator, K mean temperature of water in gas cooler, K mean temperature of refrigerant in internal heat exchanger, K overall heat transfer coefficient area of heat transfer product, WK1 refrigerant dryness fraction in evaporator pressure drop, bar density, kgm3 second law efficiency Subscripts 1–6 state point of refrigerant ev evaporator evi evaporator inlet evo evaporator outlet evr evaporator, refrigerant side evw evaporator, water side gc gas cooler gci gas cooler inlet gco gas cooler outlet gcr gas cooler, refrigerant side gcw gas cooler, water sidePDF Image | Transcritical CO2 heat pump systems
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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
Heat Pumps CO2 ORC Heat Pump System Platform More Info
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