This alpha field contains the unique identifying name for the water to water heat pump.
You can use this control to load data to the dialog from a pre-defined heat pump template as a starting point for your particular heat pump component. A sample list of manufacturers data is provided in the templates and instructions on how to create your own templates from manufacturers data.
DesignBuilder provides the EnergyPlus Equation Fit water to water heat pump model. EnergyPlus also provides the Parameter Estimation model but this only supports R22 refrigerant which is no longer permitted in new designs. Because of this and other technical limitations in the model, DesignBuilder have now removed this option so the Type control is currently disabled and is fixed as 1-Equation fit.
This numeric field contains the rated volumetric flow rate on the load side of the heat pump in (m3/s or gal/min). This corresponds to the highest load side heat transfer rate listed in the catalogue data.
This numeric field contains the rated volumetric flow rate on the source side of the heat pump in (m3/s or gal/min). This corresponds to the highest load side heat transfer rate listed in the catalogue data.
This numeric field contains the rated cooling capacity of the heat pump in W. This corresponds to the highest load side heat transfer rate listed in the catalogue data.
This numeric field contains the rated power consumption of the heat pump in W. This corresponds to the highest load side heat transfer rate listed in the catalogue data.
Five fields are used to describe the coefficients for the Cooling Capacity curve. More details on how these coefficients are used are provided in the technical section of the Water to water heat pumps page and in the Engineering Reference.
These numeric fields contain the five coefficients for the heat pump capacity.
Five fields are used to describe the coefficients for the Cooling Compressor Power consumption curve. More details on how these coefficients are used are provided in the technical section of the Water to water heat pumps page and in the Engineering Reference.
These numeric fields contain the five coefficients for the heat pump power consumption.
The full on and off cycle time of the heat pump unit in hours. You are advised to leave this data at the default value of 0.0161 hours (1 minute) which is also the minimum value. The maximum allowed value is 0.1 hours (6 minutes) but note that using values higher than the default can prevent correct operation of the heat pump.