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Change of the Thermal Conductivity of Polystyrene Insulation in term of Temperature at the Mid Thickness of the Insulation Material: Impact on the Cooling Load

Authors: M. Khoukhi

Abstract:

Accurate prediction of the cooling/heating load and consequently, the sizing of the heating, ventilating, and air-conditioning equipment require precise calculation of the heat transfer mainly by conduction through envelope components of a building. The thermal resistance of most thermal insulation materials depends on the operating temperature. The temperature to which the insulation materials are exposed varies, depending on the thermal resistance of the materials, the location of the insulation layer within the assembly system, and the effective temperature which depends on the amount of solar radiation received on the surface of the assembly. The main objective of this paper is to investigate the change of the thermal conductivity of polystyrene insulation material in terms of the temperature at the mid-thickness of the material and its effect on the cooling load required by the building.

Keywords: Operating temperature, polystyrene insulation, thermal conductivity, cooling load.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1124227

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References:


[1] M. Khoukhi and M. Tahat, “Effect of operating temperatures on thermal conductivity of polystyrene insulation material: impact on envelope-induced cooling load,” Applied. Mechanics and Materials, vol. 564, pp. 315-320, 2014.
[2] M.A. Abdelrahman and A. Ahmad, “Cost effective use of thermal insulation in hot climates,” Building Envelope, vol. 26, pp. 189-194, 1991.
[3] ASHRAE: Handbook of Fundamentals. Atlanta, GA, Chap. 23, 2001.
[4] B.A. Peavy, “A heat transfer notes on temperature dependent thermal conductivity,” Thermal Insulation Building Envelope, vol. 20, pp. 79-90, 1996.
[5] M. Khoukhi, N. Fezzioui, B. Draoui, and L. Salah “The impact of thermal conductivity of polystyrene insulation material change under different operating temperatures on the heat transfer through the building envelope”, Applied Thermal Engineering. Accepted doi: 10.1016/j.applthermaleng.2016.03.065.
[6] M. Khoukhi, and M. Tahat, “Effect of temperature and density variation on thermal conductivity of polystyrene insulation materials in Oman”, Journal of Engineering Physics and Thermophysics, vol. 88, no.4, pp. 994–998, 2015.
[7] I. Budaiwi, I., Abdou, A., and M. Al-Homoud, “Variation of thermal conductivity of insulation Materials under different operating temperatures: Impact on envelope-induced cooling load”, Journal of Architectural Engineering, 8(4): 125-132, 2002.
[8] D.F. Aldrich and R.H. Bond, “Thermal performance of rigid cellular foam insulation at subfreezing temperature thermal performance of exterior envelopes of buildings III. ASHRAE/DOE/BTECC Conference, Florida, 2-5 December, pp. 500, 1985.
[9] K.E. Wilkes and P.W. Child, “Thermal performance of fiberglass and cellulose attic insulation. thermal performance of exterior envelopes of buildings V”, ASHRAE/DOE/BTECC/CIBSE Conference, Clear Water Beach, Florida, 7-10 December, pp. 357, 1992.
[10] A. Al-Hammad, M.A. Abdelrahman, W. Grondzik, and A. Hawari, “A comparison between actual and published k-values for Saudi insulation materials”, Journal of Thermal Insulation and Building Envelopes, 17, pp. 378-385, 1994.
[11] H.A. Al-Hinai, and M. Al-Alawi, “Typical Solar Radiation Data for Oman”, Applied Energy, 52, pp.153:163, 1995.