Window 3. 1: A computer tool for analyzing window thermal performance
WINDOW 3.1 is a public-domain computer program developed by the Windows and Daylighting Group at Lawrence Berkeley Laboratory for analyzing heat transfer through window systems. The program uses an iterative technique to calculate the one-dimensional temperature profile across a user-defined window system. From this data, window system performance indices (e.g., U-value, shading coefficient) are calculated. WINDOW 3.1, a major update to WINDOW 2.0, incorporates several technical additions and many new user-friendly features, and provides a consistent and versatile means for heat transfer analysis as did WINDOW 2.0. WINDOW 3.1 can vary environmental conditions, window tilt, number of glazing layers, layer properties (thermal infrared, solar and visible optical properties, and thermal conductance), gap widths, composition of gap gas fill, and spacer and frame materials. This paper presents an overview of the computational methodology, describes the capabilities of the program, and discusses the applications of WINDOW 3.1 for standardizing window heat transfer calculations and in designing new insulating window systems. 7 refs., 5 figs.
- Research Organization:
- Lawrence Berkeley Lab., CA (USA)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 6959210
- Report Number(s):
- LBL-25148; CONF-880615-5; ON: DE88013708
- Resource Relation:
- Conference: Solar '88: American Solar Energy Society annual meeting and 13th national passive solar conference, Cambridge, MA, USA, 18 Jun 1988; Other Information: Paper copy only, copy does not permit microfiche production
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
HEAT TRANSFER
COMPUTERIZED SIMULATION
WINDOWS
ENERGY CONSERVATION
GLAZES
PERFORMANCE TESTING
RADIANT HEAT TRANSFER
THERMAL CONDUCTION
THERMAL INSULATION
W CODES
COATINGS
COMPUTER CODES
ENERGY TRANSFER
OPENINGS
SIMULATION
TESTING
320107* - Energy Conservation
Consumption
& Utilization- Building Systems- (1987-)
990220 - Computers
Computerized Models
& Computer Programs- (1987-1989)