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Parameter of Commercial Refrigeration Unit Unit °C °C K K K K °C bar bar K K K kW kW °C Value -35.0 -8.0 5.0 5.0 5.0 2.0 8.0 37.7 85.0 3.0 5.0 5.0 200.0 3.2 25 LT Evaporating temperature MT Evaporating temperature Useful superheating Superheating in the suction lines Approach temperature at the condenser 1 2 3 4 5 6 Subcritical subcooling 7 8 Specific for BHR 9 Minimum condensing temperature 10 Liquid receiver pressure pINT 11 Maximum value of high stage pressure pGC in heat recovery mode 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 developed. Vapour compression cycles for R410A and R134a have been implemented in Trnsys linked to 32 Approach temperature at the gas cooler Approach temperature at HX1 and HX2 Approach temperature at LE LE capacity Gas cooler electric power at rated conditions Specific for DX Minimum condensing temperature Specific for C 3.2. Heat pumps K °C K 5 25 5.0 Approach temperature at the cascade condenser Minimum condensing temperature Approach temperature at the desuperheater In-house models for the heat pumps suppling thermal energy for heating and for DHW production have been CoolProp libraries. The global efficiencies of the compressors are obtained as a function of the pressure ratio 33 34 35 36 solution and the correlations of the global efficiency can be found in Polzot (2017). 37 by using BITZER Software (Bitzer, 2017). More details on compressors selected in all the investigated In the air/water heat pumps of the reference solution the impact of the defrost operations has been taken into 38 39 40 41 The values of the main design parameters considered for the simulations of the heat pumps are listed in 42 account through a reduction of 10% in COP whenever the outdoor temperature goes below 0 °C . Table 3. 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 Minimum condensing temperature in cooling mode 59 60 61 62 63 64 65 Table 3. Main design parameters for heat pumps. Parameter of Heat Pumps Unit R410A R134a (heating) (DHW) K 4.0 4.0 K 4.0 4.0 K 3.5 3.5 K 10.0 10.0 K 5.0 5.0 °C 25 - % 10 10 Useful superheating Superheating in the suction lines Subcooling in heating mode Approach temperature at the source heat exchanger Approach temperature at the load heat exchanger COP reduction during defrostPDF Image | R744 BOOSTER INTEGRATED SYSTEM
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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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