.IDEAS.Controls.SetPoints.SupplyReturnTemperatureReset

Information

This block computes the set point temperatures for the supply and return water temperature. The set point for the room air temperature can either be specified by a parameter, or it can be an input to the model. The latter allows to use this model with systems that have night set back.

If used to reset the temperature in a heating system, the parameter dTOutHeaBal can be used to shift the heating curve to take into account that heat gains from solar, equipment and people make up for some of the transmission losses. For example, in energy efficient houses, the heating may not be switched on if the outside air temperature is greater than 12°C, even if a room temperature of 20°C is required. In such a situation, set dTOutHeaBal=20-12=8 Kelvin to shift the heating curve.

Revisions

• January 03, 2020, by Jianjun Hu:
  Changed name from HotWaterTemperatureReset to SupplyReturnTemperatureReset.
  This is for #1273.
• May 29, 2014, by Michael Wetter:
  Removed undesirable annotation Evaluate=true.
• February 13, 2013, by Michael Wetter:
  Corrected error that led to wrong results if the room air temperature is different from its nominal value TRoo_nominal. See ticket #74.
• November 21, 2011, by Michael Wetter:
  Improved documentation.
• February 5, 2009 by Michael Wetter:
  First implementation.