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Outside air temperature readings from a nearby National Oceanic and Atmospheric Administration (NOAA) weather station. Ecotope set up an online M&V portal to view raw data and hourly and daily averages for each of the monitored points on the HPWH system, as well as calculated values like COP and heat output . This data was automatically updated nightly, allowing engineers and installers commissioning the project to quickly receive feedback on changes. Data have been collected and available through the online tool since spring 2019. Additional information about equipment operation, system installation costs, and Sanden equipment development were gathered from project partners. Findings Summary Findings High-level data summaries from annual monitoring are provided in Table 1 below. The gallons per day reported are the total average hot water used by the building occupants. Each of these summaries are discussed in greater detail below. Table 1. Summary Measurements 1,198 20 68 3.3 Maintenance Timeline This section highlights the importance of M&V equipment on new technology installations. M&V allows for early diagnosis of problems, potentially before expensive equipment replacement is needed. Analysis of M&V data also leads to learning that can be used to improve system performance or make changes in future designs. Additionally, long- term monitoring can be valuable for informing persistence studies. M&V data has been invaluable and allowed for viewing system operation remotely. Early in the commissioning process, HPWH3 stopped operating and entered an “idle” status several times. The M&V data identified the issues. As a result the team visited the Site and addressed the idle equipment. Frequently, the equipment could be re-started by cycling the unit, after which time it would operate normally for a period before falling idle again. In February 2019, while HPWH3 was already idle, a snowstorm caused a tree limb to fall on it. Ecotope was able to use the M&V data to determine that the damaged unit was also the unit that had been idle since 54.5 59.4 147 331 Gal Per Day Gal Per Day (GPD) Total Per Apartment HPWH Energy (kWh/day) † Annual Avg Outdoor Avg Inlet H20 Avg H20 Temp Days System Air Temp (F) Temp (F) Output (F) Monitored* COP * A leak event and short energy monitoring outages required few days be dropped from the analysis dataset. Presented values represent annual estimates, using regression estimation to fill missing data periods. † Sum of all HPWHs BONNEVILLE POWER ADMINISTRATION 10PDF Image | CO2 Heat Pump Water Heater Multifamily Retrofit
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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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