You are being redirected because this document is part of your ASTM Compass® subscription.
    This document is part of your ASTM Compass® subscription.


    Dynamic Thermal Performance Measurements of Residential Wall Systems

    Published: 2018

      Format Pages Price  
    PDF (2.75 MB) 24 $25   ADD TO CART
    Complete Source PDF (31.46 MB) 205 $85   ADD TO CART

    Cite this document

    X Add email address send
      .RIS For RefWorks, EndNote, ProCite, Reference Manager, Zoteo, and many others.   .DOCX For Microsoft Word


    The use of a hot box apparatus allows for thermal performance testing of a specimen in both static and dynamic regimes. In the static (steady-state) regime, the thermal conductivity or R-value of a specimen can be obtained. In comparison, the specific heat capacity and thermal diffusivity data can be obtained during the transient regime. Additionally, if heat flux pads are employed in the hot box apparatus, it is possible to monitor the energy that passes through a specimen during thermal cycling. In the case of wall systems, it is of interest to compare the thermal performance of one system against another for the purpose of selecting suitable energy efficient structures. However, the nature of this comparison is not as simple as it would seem. In this study, the thermal performance of several wall systems were compared to evaluate their energy efficiencies relative to one another. Under steady-state conditions, it is valid to simply compare the R-values against one another assuming equivalent measurement conditions. However, we are actually interested in the real-world performance of these systems, and in this case, the comparison of R-values is not sufficient to fully characterize differences in actual thermal performance. For this reason, a 24-h cyclic thermal loading was employed that mimicked a day/night cycle. By measuring the energy transmitted through the wall, the energy required to maintain thermal comfort could be determined. This study aims to characterize the real-world thermal performance of several systems by using this method.
    R-value, clay masonry, thermal mass-->


    R-value, clay masonry, thermal mass

    Author Information:

    Huygen, Nathaniel
    National Brick Research Center–Clemson University, Anderson, SC

    Sanders, John P.
    National Brick Research Center–Clemson University, Anderson, SC

    Committee/Subcommittee: C07.90

    DOI: 10.1520/STP161220170173