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Thermal load levelling in a multilayered wall/roof
Author(s) -
Sodha M. S.,
Kumar Ashvini,
Srivastava Alok,
Tiwari G. N.
Publication year - 1981
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/er.4440050102
Subject(s) - levelling , roof , heat flux , thermal , materials science , composite material , flat roof , mechanics , thermal insulation , flux (metallurgy) , heat transfer , structural engineering , layer (electronics) , engineering , meteorology , geology , physics , metallurgy , geodesy
An explicit expression for the periodic variation of thermal flux through a multilayered insulated hollow wall/roof, whose one face is exposed to solar radiation and ambient air and the other is in contact with room air at constant temperature, has been derived. to obtain optimum placement of insulation and airgap, numerical calculations for the heat flux through a multilayered insulated hollow wall/roof have been made for a typical hot day (26 May 1978) in Delhi. It is seen that for a given total thickness of concrete, best load levelling is achieved when the thickness of the outer layer is as small as possible. the effect of a water film on heat flux into the buidling has also been discussed.