Re:Bitcoin mining heats homes for free in Siberia [video]
by maxerickson on Friday November 03, 2017 @01:32PM
(#15620841)
Your link is for Peltier coolers.
This government study of an air source heat pump maintained a real world COP of ~3 in Connecticut:
https://www.nrel.gov/docs/fy13osti/56393.pdf
It would be pretty bad to design a heat pump that dropped much below 1, better to just install a big resistive element.
Re:Bitcoin mining heats homes for free in Siberia [video]
by DINKDINK on Sunday November 05, 2017 @02:23PM
(#15631060)
Cool data. Appears the CoP vs outdoor temp plots are on page 14. Since the data doesn't provide temperature delta between the source and sink, you'd need to assume that the pump met the heat delivery requirements.
Re:Bitcoin mining heats homes for free in Siberia [video]
by wlesieutre on Friday November 03, 2017 @12:47PM
(#15620518)
Very true for air source heat pumps. Ground source is still an option for colder areas, but that's a much more involved installation.
The CoP of a heat pump is greatly dependent on the difference in temperature potential of the source and sink. If it's extremely cold outside, it's very hard to pump heat from colder air into a house. When the temperature potential between the two reservoirs is equal, sure the CoP beats out electric heating but when it's high (When your house is warm and the outside is below freezing) its extremely poor.
http://alliedthermaldesigns.com/wp-content/uploads/2012/10/T...