The Department of Energy announced that four companies have developed more planet-friendly heat pump designs.
https://www.thecooldown.com/green-business/department-of-energy-doe-heat-pump-challenge/
The Department of Energy announced that four companies have developed more planet-friendly heat pump designs.
https://www.thecooldown.com/green-business/department-of-energy-doe-heat-pump-challenge/
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It is possible to make geothermal heat pump designs, that use the earth below a building as a temperature reservoir, or a body of water such as a pond:
https://www.energy.gov/eere/geothermal/geothermal-heat-pumps
https://www.energy.gov/energysaver/geothermal-heat-pumps
This can take advantage of the fact, that the earth is cooler than ambient temperature in the summer, and warmer than ambient temperature in the winter, thereby reducing the amount of electrical energy needed by the system relative to a heat pump using outside air as a temperature reservoir.
The economics and infrastructure of geothermal heat pump systems may work better if created at a community level:
https://www.spglobal.com/marketintelligence/en/news-insights/latest-news-headlines/efforts-to-develop-centralized-community-geothermal-heat-pumps-expand-70394257
https://www.newscientist.com/article/2388343-could-a-shared-heat-pump-system-warm-every-home-on-your-street/
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