Air-water heat pump with solar thermal and fireplace? Cost/benefit/meaning

  • Erstellt am 2015-02-01 15:57:49

Häuslebau3r

2015-02-18 13:39:16
  • #1


As other users have already written, there is no best solution. I am also not a pro and am looking for the right technical conditions like you, so I am happy to continue following the topic. Somehow it is a matter of attitude and maybe you build something for the future, for example with a photovoltaic system to possibly use storage media in 10 years to store the generated electricity relatively cheaply.
 

Heimat2015

2015-02-22 19:47:17
  • #2


The house has external dimensions of 10x10m, usable area 197m², building volume 616m³, 4 occupants, Kfw 70, The heating load calculation, if you mean the heat demand by that, is 8280 kWh/a

Since I am not an expert, I can think about it just as much as before. I can only listen to what I learn from "experts"/specialists!
 

Cascada

2015-02-23 14:08:45
  • #3


If the 8280KWh/a represents the annual demand for external heat output for heating and hot water, then yes. I cannot see the documents. Assuming you install a well-dimensioned and installed air-to-water heat pump with an annual performance factor of 3.5, you would actually need about 2365 kWh/a plus circulation pump and some for the control. The mentioned 8280kwh/a probably refer to the "Norm-DIN" with 19 degrees room temperature, etc. Experts can say more about that.

But at least you have a figure you can calculate with.

As already said – with this heating load (do you live in a cold or warmer region?) I would rely exclusively on the air-to-water heat pump and omit a stove, whether water-bearing or not. The "why" has already been explained.
 

Heimat2015

2015-02-23 14:17:44
  • #4
According to the documents, an annual performance factor of 4.3 is stated in the documents. We are considering a Vaillant geotherm vwl... does the device specify the annual performance factor or is it composed of several factors?

Region not really cold but not really warm near Heidelberg.
 

Cascada

2015-02-23 15:04:06
  • #5
Google something about heat pumps and consumption database. For the systems listed there, the average annual performance factor for air-to-water heat pumps in 2014 was 3.43 - for brine heat pumps 4.18. I myself also do not know a car that complies with the factory specifications regarding consumption...
 

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