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HPWH Performance Report If we zoom in and look at the daily performance of Kelowna Site 1 at different water draws we also see the clear increase in performance on the larger water draw days. As seen in Figure 38 below, every day in which the water draw was less than 40 litres (10-gallons) has a COP of less than 1.7, and nearly every day with a draw of greater than 100-litres (26-gallons) except sub-zero days have a COP greater than 2.0. Furthermore, most of these days with high water flows had a COP of greater than 2.5 except those with very low ambient air temperatures, which is indicated by small circles in the figure below. Figure 38: Kelowna Site 1 – Daily COP vs. Water Draw To further illustrate the performance dependence on water flow, Figure 39 below shows the water temperatures, flow, and system performance of Kelowna Site 1 over the month of January. The system performs quite well on days with higher water flows. Figure 40 shows the January 9th, 2017 water temperatures, draws, and system power consumption. There are two 1-hour periods in which the heat pump runs to maintain the water temperature set-point even though there are only 30-litres (8-gallons) drawn throughout the day, mostly in the morning and evening. The small amount of useful work results in a COP of 0.69 for this cold January day. 40PDF 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
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