.AixLib.Fluid.SolarCollectors.Validation.ExtremeAmbientConditions

Information

This model validates the correct implementation of the heat transfer to the collector when ambient temperatures are very low or irradiation is very large. It applies a ramp boundary condition that reduces the ambient temperature to -60°C to verify that the collector fluid temperature does not drop below Medium.T_min. Afterwards, the solar irradiation is increased to overheat the collector. If the fluid temperature approaches Medium.T_max, then the solar heat gain is reduced to zero. Ensuring these bounds is important as otherwise, the collector model would trigger an assertion and the simulation would stop. The tested collector models are AixLib.Fluid.SolarCollectors.ASHRAE93 and AixLib.Fluid.SolarCollectors.EN12975.

Note that the medium has been declared as AixLib.Media.Water(T_min=273.15, T_max=273.15+100) to set the two bounds for the water temperature.

Contents

Name	Description
Medium	Medium in the system

Revisions

• September 25, 2023, by Michael Wetter:
  Corrected connect statement with wrong quantity.
• September 16, 2021, by Michael Wetter:
  Removed parameter assignment for lat.
  This is for IBPSA, #1477.
• June 30, 2015, by Michael Wetter:
  First implementation.