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Dynamic thermal performance of inclined double-skin roof: Modeling and experimental investigation

Author

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  • Zingre, Kishor T.
  • Yang, En-Hua
  • Wan, Man Pun

Abstract

A novel double-skin roof heat transfer (DSRHT) model is proposed to capture the dynamic thermal behavior of open-ended double-skin roof (DSR). The proposed model is validated against field measurements performed in a 13-storey-tall, naturally-ventilated residential building in Singapore. DSR exhibits dynamic thermal behavior of having an equivalent thermal resistance (or R-value = 1/U-value) 4–5 times higher during daytime than that during night-time, mainly due to the presence of an open-ended air-gap. Such dynamic behavior makes DSR more effective to prevent heat gain into the building during daytime and allow heat loss during night-time, compared to a reference flat insulated roof having a fixed R-value, in hot climate. The DSRHT model is further used to investigate the effect of roof inclination angle and climatic conditions on heat transfer through the roof. With increase in inclination angle (from 0° to 60°), annual heat curbing performance of an insulated roof enhances by 30% (as R-value increases from 4.2 to 6.0 m2-K/W), while that of a comparable DSR enhances marginally by 6% (as R-value increases from 5.2 to 5.6 m2-K/W). Comparison of annual heat gain trends of a DSR against an insulated roof for five different climate conditions showed that the DSR performance in curbing annual heat gain increases with annual-averaged solar-air temperature.

Suggested Citation

  • Zingre, Kishor T. & Yang, En-Hua & Wan, Man Pun, 2017. "Dynamic thermal performance of inclined double-skin roof: Modeling and experimental investigation," Energy, Elsevier, vol. 133(C), pages 900-912.
    • Handle: RePEc:eee:energy:v:133:y:2017:i:c:p:900-912
    DOI: 10.1016/j.energy.2017.05.181
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    Cited by:

    1. Wu, Minqiang & Li, Tingxian & He, Qifan & Du, Ruxue & Wang, Ruzhu, 2022. "Thermally conductive and form-stable phase change composite for building thermal management," Energy, Elsevier, vol. 239(PA).
    2. Xiaodan Huang & Qingyuan Zhang & Ineko Tanaka, 2021. "Optimization of Architectural Form for Thermal Comfort in Naturally Ventilated Gymnasium at Hot and Humid Climate by Orthogonal Experiment," Energies, MDPI, vol. 14(11), pages 1-18, May.
    3. Giovanni Barone & Annamaria Buonomano & Cesare Forzano & Adolfo Palombo, 2019. "Building Energy Performance Analysis: An Experimental Validation of an In-House Dynamic Simulation Tool through a Real Test Room," Energies, MDPI, vol. 12(21), pages 1-39, October.
    4. Majed Abuseif & Zhonghua Gou, 2018. "A Review of Roofing Methods: Construction Features, Heat Reduction, Payback Period and Climatic Responsiveness," Energies, MDPI, vol. 11(11), pages 1-22, November.
    5. Kirim Lee & Jihoon Seong & Youkyung Han & Won Hee Lee, 2020. "Evaluation of Applicability of Various Color Space Techniques of UAV Images for Evaluating Cool Roof Performance," Energies, MDPI, vol. 13(16), pages 1-12, August.

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