Effect of Air Flow on Heat Transfer in Walls

[+] Author and Article Information
M. Krarti

Joint Center for Energy Management, CEAE Department, University of Colorado, Boulder, CO 80390-0428

J. Sol. Energy Eng 116(1), 35-42 (Feb 01, 1994) (8 pages) doi:10.1115/1.2930063 History: Received June 18, 1992; Revised October 11, 1993; Online June 06, 2008


An analytical model to characterize the air leakage effects on the heat transfer within a permeable one-layered wall is presented. The general solution to the steady-periodic problem is presented. Temperature profiles and heat flux variations within the wall are analyzed. The effect of air flows on heat transmission through the wall are discussed using a parametric analysis. The thermal advantages of intentionally circulating air through building walls—to provide ventilation—are analyzed and discussed. In particular, the thermal performance of dynamic walls integrated in a whole building is analyzed as a function of the infiltration rate and the building thermal load. It is found that the dynamic walls can achieve energy savings of up to 20 percent of total building thermal load.

Copyright © 1994 by The American Society of Mechanical Engineers
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