01299nas a2200121   4500008004100000050001500041245008500056210006900141520084100210100002101051700003001072856007501102       1998                        eng d  aLBNL-4224100aValidation studies of the DOE-2 Building Energy Simulation Program. Final Report0 aValidation studies of the DOE2 Building Energy Simulation Progra3 a<p>This report documents many of the validation studies (Table 1) of the DOE-2 building energy analysis simulation program that have taken place since 1981. Results for several versions of the program are presented with the most recent study conducted in 1996 on version DOE-2.1E and the most distant study conducted in 1981 on version DOE-1.3. This work is part of an effort related to continued development of DOE-2, particularly in its use as a simulation engine for new specialized versions of the program such as the recently released RESFEN 3.1. RESFEN 3.1 is a program specifically dealing with analyzing the energy performance of windows in residential buildings. The intent in providing the results of these validation studies is to give potential users of the program a high degree of confidence in the calculated results.</p>1 aSullivan, Robert1 aWinkelmann, Frederick, C.  uhttps://facades.lbl.gov/publications/validation-studies-doe-2-building01532nas a2200157   4500008004100000050001400041245003300055210003200088260003400120520105600154100001801210700003001228700002501258700002501283856006601308       1994                        eng d  aLBL-3319200aModeling Windows in DOE 2.1E0 aModeling Windows in DOE 21E  aClearwater Beach, FLc12/19923 a<p>The most recent version of the DOE-2 building energy simulation program, DOE-2.1E, provides for more detailed modeling of the thermal and optical properties of windows. The window calculations account for the temperature effects on U-value, and update the incident angle correlations for the solar heat gain properties and visible transmittance. Initial studies show up to a 30% difference in calculating peak solar heat gain between the detailed approach and a constant shading-coefficient approach. The modeling approach is adapted from Lawrence Berkeley Laboratorys WINDOW 4 computer program, which is used in the National Fenestration Rating Council (NFRC) U-value rating procedure 100-91. This gives DOE-2.1E the capability to assess the annual and peak energy performance of windows consistent with the NFRC procedure. The program has an extensive window library and algorithms for simulating switchable glazings. The program also accounts for the influence of framing elements on the heat transfer and solar heat gain through the window.</p>1 aReilly, Susan1 aWinkelmann, Frederick, C.1 aArasteh, Dariush, K.1 aCarroll, William, L.  uhttps://facades.lbl.gov/publications/modeling-windows-doe-21e