Identifying and Resolving Issues in EnergyPlus and DOE-2 Window Heat Transfer Calculations

Issues in building energy software accuracy are often identified by comparative, analytical, and empirical testing as delineated in the BESTEST methodology. As described in this report, window-related discrepancies in heating energy predictions were identified through comparative testing of EnergyPlus and DOE-2. Multiple causes for discrepancies were identified, and software fixes are recommendedto better align the models with the intended algorithms and underlying test data.