Modeling windows in DOE-2.1E
- Enermodal Engineering, Inc., Denver, CO (United States)
- Lawrence Berkeley Lab., CA (United States)
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 35% 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 Laboratory`s 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.
- Research Organization:
- Lawrence Berkeley Lab., CA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States); Gas Research Inst., Chicago, IL (United States); Organization for Economic Co-Operation and Development, 75 - Paris (France). International Energy Agency; Electric Power Research Inst., Palo Alto, CA (United States)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 10166408
- Report Number(s):
- LBL-33192; TA-308; CONF-921203-13; ON: DE94014962
- Resource Relation:
- Conference: Thermal performance of the exterior envelopes of buildings,Clearwater, FL (United States),7-10 Dec 1992; Other Information: PBD: Dec 1992
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
WINDOWS
THERMODYNAMIC PROPERTIES
OPTICAL PROPERTIES
D CODES
GLAZING
COMPUTERIZED SIMULATION
COMPUTER CALCULATIONS
ALGORITHMS
THERMAL ANALYSIS
320107
990200
BUILDING SYSTEMS
MATHEMATICS AND COMPUTERS