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HPWH Performance Report 5.3 Energy Consumption by Heating Type Figure 17 shows the percent of energy consumed by the different modes of operation. Kelowna Site 3 is unducted and draws indoor air instead of outdoor air. Due to the average room temperature being 20.6°C, the unit was nearly always in heat pump mode (73% of the power consumed by heat pump operation compared to 27% by the electric element) and performed very well with an aCOP of 2.08. On the other hand, the Kelowna Site 4 system is ducted to use outside air, which was on average 15.4°C over the monitoring period and consumed 68% of the energy with the electric element and only 32% with the heat pump cycle. Consequently, Kelowna Site 4 performed with the lowest aCOP of all units tested at 1.62. Figure 18 also shows the breakdown of the percentage of hours spent heating in the different modes. Figure 17: Rheem Energy Consumption by Mode (kWh) Kelowna Site 3 Element, 495, 27% Heat Pump, 1,321, 73% Kelowna Site 4 Element, 1,793, 68% Heat Pump, 840, 32% Avg. Room Temp: 20.6°C aCOP: 2.08 Avg. Outside Air Temp: 15.9°C aCOP: 1.62 V. Island Site 1 Element, 341, 59% Heat Pump, 233, 41% V. Island Site 5 Element, 1,247, 59% Heat Pump, 859, 41% Avg. Outside Air Temp: 9.5°C aCOP: 1.76 Avg. Outside Air Temp: 16.7°C aCOP: 2.06 Vancouver Island Site 5 is located inside a garage with warmer average inlet air temperatures than the other Vancouver Island Sites and achieved a higher aCOP. 16PDF Image | CO2 Integrated Heat Pump Water Heater
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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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