This paper evaluates the effectiveness of phase change materials (PCMs) for the improvement of summer thermal comfort in lightweight buildings. Experiments have been carried out using PCM in the form of DuPont Energain wallboards in combination with a roof. Two factors influencing the effectiveness of PCM (thickness and location of PCM layer) have been investigated. An experimental study was carried out using two identical test cavities submitted to Casablanca weather. Thermal performance such as the roof surface temperatures and heat flux densities, through the envelope, have been studied. The results indicated that, compared with reference room (without PCM), the thermal storage allows solar radiation to be stored and released up to 6–7 h after solar irradiation; this has effects on both the reduction of daily temperature swings (up to 2 °C) and heat flux (more than 88%). It has been proved that the PCM with a thickness of 10.52 mm on the outer face of the roof has good thermal insulation effect and energy efficiency potential.
Thermal Behavior of a Building Provided With Phase-Change Materials on the Roof and Exposed to Solar Radiation
Microelectronics, Automatics and
Heat Transfer (LPMMAT),
Faculté des Sciences Aïn Chock,
Université Hassan II de Casablanca,
Casablanca 20100, Morocco
Contributed by the Solar Energy Division of ASME for publication in the JOURNAL OF SOLAR ENERGY ENGINEERING. Manuscript received May 18, 2017; final manuscript received August 27, 2017; published online September 28, 2017. Assoc. Editor: Ming Qu.
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Mourid, A., and El Alami, M. (September 28, 2017). "Thermal Behavior of a Building Provided With Phase-Change Materials on the Roof and Exposed to Solar Radiation." ASME. J. Sol. Energy Eng. December 2017; 139(6): 061012. https://doi.org/10.1115/1.4037905
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