Universal heat recovery
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In a home, there are appliances and systems that generate heat, and those that require heat. These systems are traditionally only coupled thorough the indoor air and conduction thorough building materials.
- Tags
- #NetZero #ZeroEnergyHome #NetPositive #WasteHeat
Heat producers
- (total available from electric appliances will be limited to some fraction of the total kW-h usage of the home)
- Refrigerators / freezers
- Dryer exhaust (also contains humidity)
- Ventilation systems (range vent hood, bathroom, etc.)
- Computers and other electronics
- Waste water from showers, bathtubs, and dishwashers
- Other motors
- Dehumidifiers
- Emergency generator exhaust
- Household battery systems
- Electric vehicle charging
- Wood or gas fireplaces
- Furnaces and air conditioners / heat pumps
Heat consumers
- Domestic water heating
- Bathing, handwashing, dish washing, clothes washing
- Clothing dryer intake
- Walkway / driveway / roof snow melting
- Food cooking (ovens, ranges; gas or electric)
Sources of heat
- Solar radiation (via thermal or electrical panels)
- Solar radiation (on outdoor hardscapes, such as driveways or walkways)
- Attic air
Sources of cold / possible heat sinks
- Incoming potable water (from city system or well)
- Rainwater / sump pump water
- Underground earth / groundwater
- Nighttime radiation into space (on clear nights)
- Defrosting freezers
Sources of cold ~and~ heat
- Outdoor air (depending on time of day / season)
- Groundwater
- Waste water drains (from sinks and toilets)
- Indoor air (via HRVs/ERVs)
- Greenhouse heating / cooling
Further reading
Government sources (worldwide)
- USA: ORNL, https://www.ornl.gov
- Australia:
- Belgium
- China:
- France:
- Germany:
- Korea:
- Iran:
- Netherlands:
- Norway:
- Japan:
- Spain:
- Switzerland:
Manufactures:
- LG Multi V - single heat-pump solution for heating, cooling, and domestic hot water
Other links:
- https://hackaday.com/2011/10/06/reclaiming-waste-heat-from-appliances/
- https://info.ornl.gov/sites/publications/files/Pub37181.pdf
- https://slate.com/human-interest/2013/12/how-can-homes-be-more-efficent-through-energy-recapture.html
- https://emerginginvestigators.org/articles/examining-heat-recovery-from-electric-light-bulbs-using-thermoelectric-generators/pdf
- http://informedinfrastructure.com/2237/sewer-heat-recovery-provides-low-cost-recycled-energy/