.IDEAS.Buildings.Components.BaseClasses.RadiativeHeatTransfer.ZoneLwDistribution

Information

The Mean Radiant Temperature Network (MRTnet) approach from Carroll (1980) is used to compute the radiative heat transfer. This is a computationally efficient approach that does not require exact view factors to be known. Each surface exchanges heat with a fictive radiant surface, leading to a star resistance network.

Parameters

Parameter simVieFac may be set to false to simplify the view factor calculation. This leads to a less accurate computation of view factors, but this approach is more robust. It may be used when the initial equation that computes the view factors does not converge.

References

Liesen, R. J., & Pedersen, C. O. (1997). An Evaluation of Inside Surface Heat Balance Models for Cooling Load Calculations. ASHRAE Transactions, 3(103), 485-502.
Carroll, J.A. 1980. An "MRT method" of computing radiant energy exchange in rooms. Proceedings of the 2nd Sys- tems Simulation and Economics Analysis Conference, January 23-25

Revisions

• February 18, 2020 by Filip Jorissen:
  Improved warning when view factor computation returns odd results. See issue #1109.
• February 1, 2017 by Filip Jorissen:
  Added option for disabling new view factor computation. See issue #663.
• January 20, 2017 by Filip Jorissen:
  Changed view factor implementation. See issue #643.
• January 19, 2017 by Filip Jorissen:
  Updated icon for issue #641 .
• January 19, 2017 by Filip Jorissen:
  Propagated parameters for linearisation.
• July 12, 2016 by Filip Jorissen:
  Changed implementation to be more intuitive. Added units to variables.