pappn

7 ms·

1. 1.▲
   by pappn 3y ago

   I think 100 households per MW in milder climates is very conservative. Anectdata: I have a ~150 square meter, 50 year old house heated by electricity and heat pump. I live I Norway, and where I live winter temperatures usually don't ge
2. 2.▲
   by pappn 4y ago

   FYI, air-to-air heat pumps are very popular in Norway. There are models that have >2 COP in -15 C, for instance Toshiba Daiseikai 9S at 2.35 at -15C, and >5 at +7C.
3. 3.▲
   by pappn 5y ago

   Note that the impressing 9x% efficiency rates that we hear about are peak efficiency rates. There is something to gain in widening the operating ranges of this efficiency also. See for instance https://www.researchgate.net/f