NBSLD, the Computer Program for Heating and Cooling Loads in Buildings

Technical Report · Thu Jul 01 04:00:00 EDT 1976

DOI:https://doi.org/10.2172/7217916· OSTI ID:7217916

Kusuda, Tamami ^[1]

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1. National Bureau of Standards, Washington, DC (United States)

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 build-design.

• Research Organization: National Bureau of Standards, Washington, DC (United States)
• Sponsoring Organization: US Department of Commerce; US Department of Housing and Urban Development
• OSTI ID: 7217916
• Report Number(s): NBS-BSS--69
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320100* -- Energy Conservation
Consumption
& Utilization-- Buildings
97 MATHEMATICS AND COMPUTING
AIR CONDITIONING
ASHRAE Task Group on Energy Requirements
BUILDINGS
COMPUTER CALCULATIONS
COMPUTER CODES
COOLING LOAD
ENERGY CONSUMPTION
ENERGY DEMAND
ENERGY LOSSES
ENERGY TRANSFER
HEAT LOSSES
HEAT TRANSFER
HEATING
HEATING LOAD
N CODES
National Bureau of Standards Heating and Cooling Load Computer Program
RADIATIONS
SOLAR RADIATION
SPACE HEATING
VENTILATION
conduction transfer functions
heating and cooling load