- Author
-
Kusuda, T.
- Title
- NBSLD (National Bureau of Standards Load Determination), The Computer Program for Heating and Cooling Loads in Buildings. Final Report.
- Coporate
- National Bureau of Standards, Washington, DC
Department of Housing and Urban Development, Washington, DC
- Sponsor
- Housing and Urban Development, Washington, DC
- Report
-
NBS BSS 069
July 1976
- Distribution
- Available from National Technical Information Service
- Keywords
-
heating load; cooling load; computer programs; buildings; fortran; conduction; heat transmission; heat balance; transfer functions; time dependence; design; energy requirements
- Identifiers
- nbsld computer program
- Abstract
- A comprehensive computer program called NBSLD, the National Bureau of Standards Load Determination program, has been developed at NBS to reflect the time change of the many building parameters which are pertinent to accurate estimation of energy usage for heating and cooling. Current status of heating and cooling load techniques is reviewed. Of general interest are unique features of NBSLD which are not available in existing computer programs. A summary of various subroutines of NBSLD is given along with the detailed procedures for them. These subroutines constitute the recommended subroutine algorithms of the ASHRAE Task Group on Energy Requirements. Complete Fortran listing of NBSLD and data preparation forms are given for those who wish to use the program. The NBSLD computation is on the basis of the detailed solution of simultaneous heat balance equations at all the interior surfaces of a room or space. Transient heat conduction through exterior walls and the interior structures is handled by using conduction transfer functions. The use of heat balance equations, although time consuming in calculation, can avoid the vagueness and uncertainties inherent in the more popularly used weighting factor approach. In addition, it is more accurate for a specific building design.