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120 110 100 90 80 70 60 50 40 30 20 10 0 -10 -20 -30 -12 °C ambient air temperature 1.8 KW/deltaT=5K/0,31m3/h 2.6 KW/deltaT=5K/0,45m3/h 3 KW/deltaT=8K/0.33m3/h 4.7 KW/deltaT=8K/0,50m3/h Figure 18 Heat pump performances at different heating loads at -12°C outdoor temperature As shown in the above figures, the compressor power increases slightly with decreased outdoor temperature. As a consequence, the CO2 temperature at the compressor outlet will increase. This helps to maintain the water outlet temperature at the desired temperature at lower outdoor temperatures. The water flow rate from the water tank to the heat pump unit is controlled to maintain the temperature of the water delivered to the water tank to around 65 °C. It can also be noticed from the charts that the radiator inlet temperature will increase with decreased outdoor temperature (Fig. 19). 27 -19.96 -19.51 -19.50 -20.18 2.48 2.50 2.48 2.43 0.20 0.20 0.25 0.16 4.40 3.90 4.09 4.51 1.77 1.56 1.64 1.86 40.47 44.77 43.53 37.58 39.99 39.54 37.81 37.39 47.67 47.48 46.54 45.85 59.46 61.26 57.66 61.21 105.90 105.02 104.23 104.17 CO2 compr. in [°C] water gas cooler in [°C] water gas cooler out CO2 compr. out [°C] Trad return [°C] Trad supply [°C] Compressor power [kW] Flow [m3/h] heating capacity [kW] COP [-]PDF Image | CO2 heat pumps for the Swedish market
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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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