Thermal Performance Evaluation of Common Exterior Residential Wall Types in Egypt

Abstract

The demand for energy-efficient housing is on the rise in Egypt. The information about the individual materials used in the construction of typical residential wall assemblies are known in the literature. However, data from lab tests to validate the performance for whole composite walls are limited. Three typical wall types were constructed and tested utilizing a standard experimental evaluation procedure based on thermal convection loads. A research framework combining the validated thermal performance data from the experimental test and the simulated data was developed. The experimental tests were performed utilizing a state-of-the-art guarded hotbox apparatus and following the guidelines of the ASTM C1363-11 standard. The solar radiation load was taken into account in the calculations according to the standard, and the error estimation and uncertainty analysis for the experimental tests are reported. The results of the experimental testing are described and a recommendation of the best wall type is noted. The output of this research will help to initiate a material database of the thermal performance of typical residential wall types used in Egypt that have been validated in the lab. This will be useful for the building industry as a whole to understand the performance of the materials in composite assemblies and their impact on energy efficiency.

Early-Stage Temperature Gradients in Glazed Spandrels Due to Aesthetical Features to Support Design for Thermal Shock

“…Widiastuti et al [15,16] measured the influence of leaves density on a green façade on energy transfer. Tarabieh et al [17] used the "hotbox" method to measure the U-value of different wall types in Egypt. However, there is no specific work aiming to provide design support for the specification of spandrels, although spandrels play a fundamental role in potential operational failures of the entire façade of buildings.…”

The Development of a Highly Insulated, Thin Wall Assembly for Canadian Residential Construction

“…Moore et al [48] used a guarded hot box apparatus to study a metal stud wall incorporating VIP insulation, determine its effective thermal resistance, and identify the thermal bridges present on the edges of the VIP panels. Tarabieh and Aboulmagd [49] used the guarded hot box procedure to characterize the performance of three wall assemblies typical in Egypt to identify areas of potential improvement and to identify the best wall design. Finally, Conti et al [50] used the guarded hot box apparatus to study the thermal properties of rectangular straw bales, a potential biogenic insulation material, to better understand how it can be incorporated into building envelopes.…”