Exit temperature of compressor for different fluids Variable to,t=40C,n=70% 9 300 =40℃ 6=0,7 250 200 150 月41A 100 HFC-1344 R-50TA- 40 30 20 10 10 Saturation temperature,t(C) .HFC fluids(POE),propane(MO,POE)-maximum exit temperature of the compressor 120c Ammonia(PAO)-maximum exit temperature of the compressor 160C ONTNU ②SINTEF Pressure levels Curves for vapor pressure as function of the saturation temperature 0 R744 Operation pressure -R-4TO in CO,-systems is ==R-717 typical 5 to 10 times 。-R-4070 73,8 bar higher than with use 民22-- R280 of HFC and ---R134h ammonia -R12 C02 Normal refrigeration R22 and heat pump R410A R290 systems are limited R134a to approx 28C 25bar R407C condensing R12 temperature Necessary with actions to handle 40 20 0 20 40 60 0 100 high deadhead Saturation temperature,t [C] pressure during longer stops ONTNU 16 SINTEF15 Exit temperature of compressor for different fluids Variable t0 , tc=40°C, hi=70% • HFC fluids (POE), propane (MO, POE) – maximum exit temperature of the compressor 120ºC • Ammonia (PAO) – maximum exit temperature of the compressor 160ºC Saturation temperature, to ( oC) Compressor discharge temperature, oC 16 Pressure levels Curves for vapor pressure as function of the saturation temperature • Operation pressure in CO2 -systems is typical 5 to 10 times higher than with use of HFC and ammonia • Normal refrigeration and heat pump systems are limited to approx 28°C condensing temperature • Necessary with actions to handle high deadhead pressure during longer stops CO2 NH3 R134a R407C R410A R290 R12 R22 25 bar 73,8 bar Metningstemperatur [°C] Pressure [MPa] Saturation temperature, t [oC]