- #1
Low-Q
Gold Member
- 284
- 9
Hi,
I am building a new house. This house will be heated by a heat exchanger. I have been told that heat exchangers have a COP of 3-4 in practice (depending on inside and outside temperature, and the cooling medium).
What I do not understand, is the COP>1 part. In order to "charge" the house with heat, by extracting heat from outside air, it will require energy input to the pump. The house is leaking heat back to the outside air, so the heat exchanger must run in order to keep the same temperature in the house.
The house is insolated well, but that would also mean that a normal electric oven must add small portions of energy to keep the air inside at the same temperature...
I simply cannot understand how input energy is greater than output energy, and that heat exchangers does not require the same energy to sustain the temperature insde as a conventional electric oven does.
Can someone explain this in detail?
br.
Vidar
I am building a new house. This house will be heated by a heat exchanger. I have been told that heat exchangers have a COP of 3-4 in practice (depending on inside and outside temperature, and the cooling medium).
What I do not understand, is the COP>1 part. In order to "charge" the house with heat, by extracting heat from outside air, it will require energy input to the pump. The house is leaking heat back to the outside air, so the heat exchanger must run in order to keep the same temperature in the house.
The house is insolated well, but that would also mean that a normal electric oven must add small portions of energy to keep the air inside at the same temperature...
I simply cannot understand how input energy is greater than output energy, and that heat exchangers does not require the same energy to sustain the temperature insde as a conventional electric oven does.
Can someone explain this in detail?
br.
Vidar