modelDemand

Information

This model is able to represent a thermal demand. The main idea is to model the characteristics of a heat demand by modelling its main variables, i.e., heat load and return temperature.

Three different options to model the heat load are possible:

• Use heat load profile from file
• Use input connector as heat demand signal
• Use a constant heat demand

To represent the behaviour of the thermal demand in terms of its return temperature, three different options are available:

• Use return temperature profile from file
• Use constant return temperature
• Derive the return temperature using a radiator model based on the EN442 standard

Different issues can accure with this model:

• Heat demand and heat supply do not always match (as a result of too low supply temperature, too high demand, etc.)
• Low supply temperature or low temperature difference between supply and return might lead to high mass flows but might still result in an undersupply of the demand

To avoid this issues, care must be taken in specifying the nominal values such as heat load, supply temperature, return temperature and mass flow.

Parameters

Connectors

Components

Revisions

• Feburary 27, 2019, by Benedikt Leitner:
  Implementation and added User's guide.