Additional heating support from solar/fireplace

  • Erstellt am 2020-08-27 10:00:40

T_im_Norden

2020-08-27 13:00:51
  • #1
Without further information, this cannot be answered.

How much more are the electricity costs due to the heating cartridge?
How old is the house?
What is its heating load?
Wood stove with pellets?
Current flow temperature?
 

neo-sciliar

2020-08-27 14:41:45
  • #2


I have read this several times now and don’t understand it. We have exactly that: an MFS, which is heated by stove, solar, and heat pump. It works. Yes, the control system required quite a bit of experience from us.

The heat pump alone on the buffer is pointless; then it heats the buffer. But once the buffer is warm, the heat pump can maintain the temperature.... whether it compensates a delta-T in the buffer or in the underfloor heating should not matter to it.

The problem when you connect the heat pump directly to the underfloor heating is controlling the flow temperature. The heat pump is the only “intelligent” device in the system that can calculate and control a flow temperature. If you separate it from the buffer, then you might overload the buffer with heat (via stove or solar), and who then regulates the output to the underfloor heating?
 

Joedreck

2020-08-27 15:14:47
  • #3
Because you have losses through the buffer, for example. The assumed system is, in terms of control engineering (in my opinion), a nightmare. I would stay in the hT range.
 

neo-sciliar

2020-08-27 15:26:07
  • #4
As written, it is a grown environment. I wouldn’t build it new (anymore) either. But it works, and well at that (just yesterday received a bill of over €300 electricity costs for 1 year for 220 sqm heated area).
 

Joedreck

2020-08-27 16:51:15
  • #5
That it is the way it is, simply is. You don't even have to justify yourself. The question is, what really makes sense as a supplement given the low annual costs.
 

neo-sciliar

2020-08-27 18:06:34
  • #6
2 different topics. Nothing will be changed in the current state. We are building new, that looks different already.
 

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