Saruss
2015-12-03 19:54:34
- #1
Usable area: 154.4 m²
Heating demand 45 kWh/m²a
Primary energy demand 37.2 kWh/m²a
Final energy demand 14.3 kWh/m²a
System efficiency factor eP: 0.766
Annual renewable electricity production / photovoltaic system: 3000 kWh/a
Coverage ratio of photovoltaic system: 38.3%
And from a heating engineer I have different heat pumps and their seasonal performance factors:
Split heat pump: 3.34
Monobloc heat pump: 3.67
Ground source heat pump with horizontal collector: 4.67
2.) How can I calculate a comparison of the types of heat pumps with the available values? Because the different types differ in price and seasonal performance factor and I would like to know when the more expensive variants pay off. It would be great if someone could explain this to me or do an example calculation.
Regarding 2) I would just ignore the solar production for heating, since this does not really matter during heating demand in winter/night anyway.
Then it means 45 kWh/m²a * 155 m² = 6975 kWh heating demand (estimated).
Now divide by the performance factors, which results in the electricity demand,
e.g. 6975 / 3.34 = 2088 or 6975 / 4.67 = 1493 (in kWh, so about 600 kWh difference, approx. 130€ per year).
However, this is only a very rough calculation; since it is only the energy saving ordinance calculations ("estimates" according to certain specifications), your heating/use behavior is missing, hot water is not considered (which can especially impact air-water heat pumps on cold days if you need a lot), and so on.