CO2 Integrated Heat Pump Water Heater

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CO2 Integrated Heat Pump Water Heater ( co2-integrated-heat-pump-water-heater )

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HPWH Performance Report Kelowna Site 1 performed the lowest of all Sanden units with a total COP of 1.76 over the 15 month monitoring period (aCOP of 1.86). This is primarily due to the site having a very low water draw (85 litres/day) relative to the other sites (136 litres/day on average for Sanden sites), and seeing low local ambient air temperatures (6.6°C on average). Figure 37 below shows all the relationship of COP versus air temperature and COP versus average daily water flow for all Sanden sites over the total monitoring period. Both factors are positively correlated with performance, and Kelowna’s low water draw and ambient temperatures result in a low COP. The COPs displayed in the figure below are the total COP over the monitored period and therefore differ slightly than the annualized average aCOP. Figure 37: Sanden Units – Impact of Low Air Temperature and Water Draw on COP 39

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