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A generalized methodology for determining the total heat gain through building envelopes
Author(s) -
Chou S. K.,
Chang W. L.
Publication year - 1996
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/(sici)1099-114x(199610)20:10<887::aid-er202>3.0.co;2-t
Subject(s) - solar gain , envelope (radar) , building envelope , parametric statistics , thermal conduction , heat transfer , opacity , thermal , engineering , mechanical engineering , computer science , meteorology , mathematics , mechanics , aerospace engineering , thermodynamics , physics , statistics , radar , optics
We present a generalized methodology for determining the annual total heat gain through external walls and proofs of large air‐conditioned buildings. The methodology is based on the concept of the overall thermal transfer value (OTTV). Respective OTTV equations for building envelopes and roofs are developed through parametric simulations using the DOE‐2 computer code. The equations are valid for buildings having different aspect ratios and wall masses. Appropriate coefficients for heat conduction through fenestrations and opaque walls and solar correction factors for wall facades of different orientations are computed from local weather data. The equations allow building designers to make accurate estimates of the total heat gain for the purpose of evaluating energy‐efficient building envelope components and air‐conditioning systems and plant options. The methodology is validated using DOE‐2 computed heat gain results and can be applied to different classes of buildings, construction types and locations.