Heat Pumps as Consumers (PV-Simulation only)

A heat pump card appears with the following input options:

The requirements for heating, cooling and hot water in hWh/a. These are preset if the building can be simulated, but can be adjusted to the actual consumption. By clicking on the "calculate"-button the consumption will be recalculated.

The hot water demand comes from the profile on the profile card. If the hot water demand is not to be covered by the heat pump, it can be set to 0 there.

Properties of the heat pump can be entered below the dividing line.

At the top the nominal power of the heat pump is to be entered.

Below this, it is possible to specify how any remaining demand is to be covered. This can be done either by a heating rod or non-electrically. In the latter case, the remaining demand is not considered further for the PV simulation.

The nominal power for cooling can also be entered, or set to 0 if the heat pump is not used for cooling.

For the heat source, a choice can be made between outside air and ground. This influences the source temperature and thus the COP of the heat pump. If "Outside air" is selected, the temperature of the outside air from the weather data is assumed as the source temperature; if "Ground" is selected, the ground temperature is calculated and used as the source temperature.

Under Power control, you can choose between modulating and constant operation, depending on the type of heat pump. Modulating heat pumps have to cycle much less often, because they can throttle their output, which is advantagous for their lifetime and their COP.

In addition, it is possible to choose between panel heating or radiator. This influences the flow temperature of the heating system. A target flow temperature of 35°C is assumed for panel heating, and 55°C for radiators. This in turn influences the COP of the heat pump.