This paper experimentally verifies and compares two dynamic test methods for a calibrated hot box to characterize the transient thermal performance of complex walls. In these methods, a wall specimen is sandwiched between the two conditioning chambers of a calibrated hot box. The exterior surface of the wall specimen is subjected to a time-varying excitation function in air temperature. At the interior surface, the air temperature is maintained steady, and the heat transfer response is measured. Conduction transfer function coefficients that relate the measured heat transfer response to the excitation function are derived. The two dynamic test methods were applied to an insulated hollow concrete block wall that contained significant thermal bridges and lateral heat flows. Empirical transfer function coefficients derived by the test methods predicted with good agreement the heat transfer response of this wall specimen when its exterior surface was subjected to excitation functions that differed markedly from those used to derive the coefficients.
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A Comparison of Two Test Methods for Determining Transfer Function Coefficients for a Wall Using a Calibrated Hot Box
D. M. Burch,
D. M. Burch
National Institute of Standards and Technology, Gaithersburg, MD 20899
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B. A. Licitra,
B. A. Licitra
National Institute of Standards and Technology, Gaithersburg, MD 20899
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R. R. Zarr
R. R. Zarr
National Institute of Standards and Technology, Gaithersburg, MD 20899
Search for other works by this author on:
D. M. Burch
National Institute of Standards and Technology, Gaithersburg, MD 20899
B. A. Licitra
National Institute of Standards and Technology, Gaithersburg, MD 20899
R. R. Zarr
National Institute of Standards and Technology, Gaithersburg, MD 20899
J. Heat Transfer. Feb 1990, 112(1): 35-42 (8 pages)
Published Online: February 1, 1990
Article history
Received:
June 16, 1988
Revised:
June 19, 1988
Online:
May 23, 2008
Citation
Burch, D. M., Licitra, B. A., and Zarr, R. R. (February 1, 1990). "A Comparison of Two Test Methods for Determining Transfer Function Coefficients for a Wall Using a Calibrated Hot Box." ASME. J. Heat Transfer. February 1990; 112(1): 35–42. https://doi.org/10.1115/1.2910361
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