Effects of indoor and outdoor heat-transfer coefficients and solar absorptance on heat flow through walls

 
see the original item page
in the repository's web site and access all digital files if the item*
share




1993 (EN)
Effects of indoor and outdoor heat-transfer coefficients and solar absorptance on heat flow through walls (EN)

Antonopoulos, KA (EN)
Valsamakis, SP (EN)

N/A (EN)

In the calculation of space heat gain or loss through walls, it is customary to use standard values of the indoor and outdoor heat-transfer coefficients and solar absorptance h(int), h(out) and alpha, respectively. This practice may lead to considerable errors. In the present study, the effects of these parameters are examined by solving the transient one-dimensional heat-conduction differential equation using the finite-difference method within typical wall constructions of various orientations with per-iodic outdoor boundary conditions, during typical winter and summer days. Using the results obtained, correlations are developed which express the daily maximum indoor heat flow for various orientations during the typical winter and summer days and the time at which this maximum value occurs in terms of h(int), h(out) and alpha. Although these correlations were developed for a typical wall construction, location and indoor air temperature, they may be used as approximations for different wall constructions, locations and indoor air temperatures after making suggested corrections. (EN)

journalArticle

Temperature (EN)
Heat losses (EN)
Correlation methods (EN)
Space heating (EN)
Heat conduction (EN)
One dimensional heat conduction differential equations (EN)
Differential equations (EN)
Wall flow (EN)
Approximation theory (EN)
Mathematical models (EN)
Indoor and outdoor heat transfer coefficients (EN)
Solar radiation (EN)
Energy absorption (EN)
Solar absorptance (EN)
Heat transfer (EN)
Finite difference method (EN)

Εθνικό Μετσόβιο Πολυτεχνείο (EL)
National Technical University of Athens (EN)

Energy (EN)

1993


PERGAMON-ELSEVIER SCIENCE LTD (EN)



*Institutions are responsible for keeping their URLs functional (digital file, item page in repository site)