.IDEAS.Fluid.HeatPumps.BaseClasses.HeatSource_HP_AW2

Information

Description

This model is based on data received from Daikin from an Altherma heat pump, and the full heat pump is implemented as IDEAS.Thermal.Components.Production.HP_AWMod_Losses. (vermoedelijk IDEAS.Thermal.Components.Production.HP_AirWater

The nominal power of the original heat pump is 7177 W at 2/35 degC.

First, the thermal power and electricity consumption are interpolated for the evaporator and condensing temperature at 4 different modulation levels. The results are rescaled to the nominal power of the modelled heatpump (with QNom/QNom_data) and stored in 2 different vectors, Q_vector and P_vector.

Finally, the modulation is calculated based on the asked power and the max power at operating conditions:

if modulation_init < modulation_min, the heat pump is OFF, modulation = 0.
if modulation_init > 100%, the modulation is 100%
if modulation_init between modulation_min and modulation_start: hysteresis for on/off cycling.

If the heat pump is on another modulation level, interpolation is made to get P and Q at the real modulation.

ATTENTION

This model takes into account environmental heat losses of the heat pump. In order to keep the same nominal efficiency during operation, these heat losses are added to the computed power. Therefore, the heat losses are only really 'losses' when the heat pump is NOT operating.

The COP is calculated as the heat delivered to the condensor divided by the electrical consumption (P).

Assumptions and limitations

Based on interpolation in manufacturer data for Daikin Altherma heat pump
Ensure not to operate the heat pump outside of the manufacturer data. No check is made if this happens, and this can lead to strange and wrong results.

Model use

This model is used in the HP_AirWater model. If a different heat pump is to be simulated, copy this model and adapt the interpolation tables.

Validation

See the air-water heat pmp model.

Name	Description
Medium	Medium in the component