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Nomenclature COP1 COP2 CFC cp Eannual elbu F-gas F-gas regulation FC GWP h1 Coefficient of performance (heating mode) [-] Coefficient of performance (cooling mode) [-] Chlorofluorocarbon Specific heat capacity [kJ/kg-K] Annual energy consumption [kWh/year] Electric back-up [kW] Fluorinated gas Regulation of the European Parliament and of the Council on fluorinated gases and repealing Regulation (EC) No 842/2006 Fluorocarbon Global warming potential Enthalpy at inlet of evaporator [J/kg] h2 h3 h3,is h4 HC HCFC HFC HFO HP k Lannual LMTD πΜ /πΜ πππ m N ODP P Pratio q1 Μ πΈπ SCOP T TEWI Μ π½πππππ VHC w wid Μ πΎ Enthalpy at outlet of evaporator/inlet compressor [J/kg] Enthalpy at outlet compressor/inlet condenser [J/kg] Enthalpy at outlet compressor (isenthalpic process) [J/kg] Enthalpy at outlet condenser/inlet expansion valve [J/kg] Hydrocarbon Hydrochlorofluorocarbon Hydrofluorocarbon Hydrofluoroolefin Heat pump Thermal conductivity [W/m-Β°C] Annual leakage rate [kgref/year] Logarithmic mean temperature difference [Β°C] Mass flow rate/mass flow rate of refrigerant [kg/s] Refrigerant charge [kg] Lifetime of system [years] Ozone depletion potential Pressure [kPa] Pressure ratio [-] Specific heating capacity [J/kg] Heating capacity [kW] Season coefficient of performance [-] Temperature [Β°C] Total equivalent warming impact [kg CO2] Swept volume [m3/s] Volumetric heating capacity [kJ/m3] Compressor specific work [J/kg] Ideal required specific work [J/kg] Compressor power [kW] Greek characters Ξ±recovery Ξ² Ξ·k Ξ·s ΞΌ Ο Recovery efficiency of refrigerant [-] CO2 emission factor [kgCO2/kWh] Efficiency of compressor [-] Volumetric efficiency [-] Dynamic viscosity [Pa/s] Density [kg/m3] viiPDF Image | Next generation of refrigerants for residential heat pump systems
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