autarc

The simulation offers two ways to set the heat pump's electricity consumption: manually or from the seasonal performance factor (SPF).

If you work with standard values or need a quick simulation, enter the yearly electricity consumption under <code>Heat pump electricity consumption (yearly, kWh)</code>. autarc spreads it over the year using the <code>Usage pattern</code> and bills it at the heat pump's tariff.

Calculating electricity consumption with the seasonal performance factor (SPF)

Switch on <code>Use seasonal performance factor (SPF)</code>. autarc then calculates the electricity consumption from the heat load, the full load hours and the SPF:

Heat demand = heat load × full load hours  Heat pump electricity consumption = heat demand / SPF

Heat load: you edit the heat load in the <code>Heating planner</code> under <code>Technical Parameters</code>: <code>Directly enter</code>, <code>Consumption-based</code> from previous consumption data, or <code>Room-based</code> using method B. The <code>Heating planner</code> link in the simulation takes you straight there. In the UK, the link is called <code>Heat pump details</code>.

Full load hours: autarc determines them automatically from the postcode of the project address and the design outside temperature.

SPF: enter the SPF under <code>Seasonal performance factor (SPF)</code>. If a heat pump is selected under <code>Heat pump model</code>, autarc prefills the field with its COP at A2/W35. The COP is often close to the SPF but doesn't replace an SPF calculation. For projects in Germany, the <code>SPF calculator</code> link opens the <a href="https://www.waermepumpe.de/werkzeuge/jaz-rechner/" rel="nofollow noopener noreferrer" target="_blank">SPF calculator of the German Heat Pump Association</a>.

- Heat load: you edit the heat load in the <code>Heating planner</code> under <code>Technical Parameters</code>: <code>Directly enter</code>, <code>Consumption-based</code> from previous consumption data, or <code>Room-based</code> using method B. The <code>Heating planner</code> link in the simulation takes you straight there. In the UK, the link is called <code>Heat pump details</code>.
- Full load hours: autarc determines them automatically from the postcode of the project address and the design outside temperature.
- SPF: enter the SPF under <code>Seasonal performance factor (SPF)</code>. If a heat pump is selected under <code>Heat pump model</code>, autarc prefills the field with its COP at A2/W35. The COP is often close to the SPF but doesn't replace an SPF calculation. For projects in Germany, the <code>SPF calculator</code> link opens the <a href="https://www.waermepumpe.de/werkzeuge/jaz-rechner/" rel="nofollow noopener noreferrer" target="_blank">SPF calculator of the German Heat Pump Association</a>.

How to enter the heat pump's electricity consumption in the simulation manually or calculate it from the seasonal performance factor (SPF).

Calculating the heat pump's electricity consumption with the SPF

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Calculating the heat pump's electricity consumption with the SPF

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Calculating electricity consumption with the seasonal performance factor (SPF)