.Buildings.Fluid.HydronicConfigurations.ActiveNetworks.Examples.BaseClasses.Load

Information

This model represents a thermal load on a hydronic circuit, typically a terminal unit with recirculating air such as a fan coil unit. It takes the fraction of the design load u as input and returns the control valve demand signal yVal as output. In steady-state conditions, the model provides zero load for u=0 and the design load for u=1. However, for a cooling load with condensation, the relationship between u and the load is not linear. The main modeling assumptions are described below.

• The heat exchanger is modeled in steady-state by default (dynamics may be reintroduced with the parameter energyDynamics).
• No pressure drop is considered, neither on the load side, nor on the source side (the design pressure drop on the source side may be reset with the parameter dpLiq_nominal).
• The mass flow rate and the inlet conditions on the load side are constant. The load is modulated by varying the supply temperature set point.

Contents

Name	Description
MediumAir	Medium model for air
MediumLiq	Medium model for liquid (CHW or HHW)

Revisions

• June 30, 2022, by Antoine Gautier:
  First implementation.