blockTransmittedRadiation

Information

The model calculates the solar radiation through the window. The calculations follow the description in Wetter (2004), Appendix A.4.3.

The transmitted exterior radiation for window system includes:

1. the transmitted diffusive radiation on unshaded part: AWin*(1-uSha)*HDif*tau(HEM)
2. the transmitted direct radiation on no shade part: AWin*(1-uSha)*HDir*tau(IncAng)
3. the transmitted diffusive radiation on shaded part: AWin*uSha*HDif*tauSha(HEM)
4. the transmitted direct radiation on shaded part: AWin*uSha*HDir*tauSha(IncAng);

The outputs are QTraDif_flow = Part1 + Part3 and QTraDir_flow = Part2 + Part4.

References

• Michael Wetter.
  Simulation-based Building Energy Optimization.
  Dissertation. University of California at Berkeley. 2004.

Parameters

Connectors

Components

Revisions

• June 7, 2016, by Michael Wetter:
  Removed output QTra_flow and introduced instead QTraDif_flow and QTraDir_flow. This is for issue 451.
• August 7, 2015, by Michael Wetter:
  Revised model to allow modeling of electrochromic windows. This is for issue 445.
• March 13, 2015, by Michael Wetter:
  Changed initial algorithm to initial equation section to avoid a translation error in OpenModelica.
• March 4, 2011, by Wangda Zuo:
  Remove the if-statement and integer function that can trigger events.
• February 2, 2010, by Michael Wetter:
  Made connector uSha a conditional connector.
• December 15, 2010, by Wangda Zuo:
  Separate transmittance and absorbance models from the window radiation model.
• December 12, 2010, by Michael Wetter:
  Replaced record Buildings.HeatTransfer.Data.GlazingSystems with the parameters used by this model. This was needed to integrate the radiation model into the room model.
• December 10, 2010, by Wangda Zuo:
  First implementation.