The simulation of glazing systems in the dynamic thermal model HTB2

This paper discusses the modification and testing of an existing dynamic thermal model to include the calculation of the effects of glazing and shading options such as slatted blinds. It discusses the selection and development of algorithms, the testing of component sub-models against detailed models, and provides comparisons against theoretical and measured benchmarks. The modified model is found capable of predicting total solar transmission of glazing with mid-pane shading combinations, expressed as a G-value, to ±0.04. Though further refinement may be made, this is considered sufficient to distinguish between many glazing options faced at a design stage.