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Table 2 List of the testing conditions Heating load (KW) 4,7 Temperature difference (K) 8 Radiator water flow rate (m3/h) 0.5 3 8 0.33 2.9 5 0.5 1.9 5 0.33 All test runs are done at stable operating conditions for the entire heat pump system (including the plate heat exchanger). Dynamic changes of the tank conditions are inevitable, but should be kept in a way not affecting the other parameters. If these prerequisites are realized, average values over the stable period, which should last between 30 and 60 minutes, shall represent a specific condition. Figures 15 thru 18 show the test results at different outdoor temperatures for different capacities (i.e. different compressor speeds) and water flow rates. 120 110 100 90 80 70 60 50 40 30 20 10 0 -10 -20 +0 °C ambient air temperature 1.9KW/deltaT=5K/0,33m3/h 2.9KW/deltaT=5K/0,49m3/h 3KW/eltaT=8K/0.33m3/h 4.7KW/deltaT=8K/0,50m3/h Figure 15 Heat pump performances at different heating loads at 0°C outdoor temperature 25 -8.23 -9.10 -8.06 -9.25 2.34 2.14 2.34 2.15 0.16 0.16 0.16 0.16 5.63 5.05 5.69 5.39 2.40 2.36 2.44 2.51 33.07 34.86 31.76 31.49 32.94 34.34 31.45 31.42 38.56 39.40 39.28 39.74 63.54 61.72 63.13 60.86 111.99 92.17 111.74 92.27 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
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