Window 3. 1: A computer tool for analyzing window thermal performance

Conference · Sun May 01 00:00:00 EDT 1988

OSTI ID:6959210

Reilly, S; Arasteh, D

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
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320107* -- Energy Conservation
Consumption
& Utilization-- Building Systems-- (1987-)
99 GENERAL AND MISCELLANEOUS
990220 -- Computers
Computerized Models
& Computer Programs-- (1987-1989)
COATINGS
COMPUTER CODES
COMPUTERIZED SIMULATION
ENERGY CONSERVATION
ENERGY TRANSFER
GLAZES
HEAT TRANSFER
OPENINGS
PERFORMANCE TESTING
RADIANT HEAT TRANSFER
SIMULATION
TESTING
THERMAL CONDUCTION
THERMAL INSULATION
W CODES
WINDOWS