Sanders, John1; Carrier, Jerry2; Clark, Jr., Charles3 and Huygen, Nathaniel4
1 Director, The National Brick Research Center, Clemson University, 100 Clemson Research Blvd, Anderson SC, 29625, United States, jpsand@clemson.edu
2 Director, Design Services/Research and Development, Glen Gery Corporation, 1166 Spring St., PO Box 7001, Wyomissing PA, 19610, United States, jerry.carrier@glengery.com
3 Vice President Engineering Services, Brick Industry Association, 12007 Sunrise Valley Dr., Reston VA, 20191, United States, cclark@bia.org
4 Graduate Research Assistant, The National Brick Research Center, Clemson University, 100 Clemson Research Blvd, Anderson SC 29625, United States, nhuygen@g.clemson.edu
ABSTRACT
The dynamic thermal performance of a clay brick masonry wall system was measured using an innovative hot box design. Heat flux sensors were used extensively to measure heat flows and heat storage due to the thermal mass in several stud wall systems. The performance of this hot box was validated by testing a number of test panels with known thermal properties. This study primarily focused on measuring the contribution of brick veneer and the air space between the veneer and sheathing to the thermal performance of the wall system. The wall panels were exposed to a standard set of exposure conditions that included both steady state temperature differences and dynamic exposures. The R-value and effective heat capacity were measured for each wall system using these standard exposure conditions. Thermal decrement and lag were also measured for thewall systems during dynamic measurements. A number of thermal performance metrics for the wall systems were analyzed and discussed. Clay brick veneer was found to significantly reduce the flow of energy through the wall system during dynamic cycling with both open and closed weepholes when compared to the same wall system with no veneer. Steady state measurements did not adequately capture the benefit of the reduction in energy flow through the wall due to the
thermal mass provided by the veneer.
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