.Buildings.Fluid.SolarCollectors.EN12975

Information

Overview

This component models a solar thermal collector according to the EN12975 test standard.

Notice

• As mentioned in EnergyPlus 7.0.0 Engineering Reference, the SRCC incident angle modifier equation coefficients are only valid for incident angles of 60 degrees or less. Because these curves behave poorly for angles greater than 60 degrees the model does not calculate either direct or diffuse solar radiation gains when the incidence angle is greater than 60 degrees.
• By default, the estimated heat capacity of the collector without fluid is calculated based on the dry mass and the specific heat capacity of copper.

References

EnergyPlus 7.0.0 Engineering Reference, October 13, 2011.

Revisions

• December 11, 2023, by Michael Wetter:
  Corrected implementation of pressure drop calculation for the situation where the collectors are in parallel, e.g., if sysConfig == Buildings.Fluid.SolarCollectors.Types.SystemConfiguration.Parallel.
  Changed assignment of computeFlowResistance to final based on dp_nominal.
  This is for Buildings, #3597.
• September 16, 2021, by Michael Wetter:
  Changed lat from being a parameter to an input from weather bus.
  This is for IBPSA, #1477.
• December 17, 2017, by Michael Wetter:
  Revised computation of heat loss.
  This is for issue 1100.
• November 21, 2017, by Michael Wetter:
  Corrected error in heat loss calculations that did not scale correctly with nPanels.
  This is for issue 1073.
• January 4, 2013, by Peter Grant:
  First implementation.