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Parameterization study of the overall thermal-transfer value equation for buildings

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  • Chow, W. K.
  • Chan, K. T.

Abstract

Modern buildings in Hong Kong are characterized by high window-to-wall ratios. This leads to large energy consumption due to the solar radiative heat gain. The problem is now of great concern to the industry not just because of the energy usage, but also due to the environmental problem that arises from overusage of energy. The government is considering implementing some regulations for controlling the cooling load in centrally air-conditioned buildings. The concept of overall thermal-transfer value (OTTV) is proposed to be used as a guideline for designing the building envelopes. However, those equations for calculating the OTTV recommended by the draft design guide are rather unclear. Many parameters that influence the OTTV equation have not been studied thoroughly yet. This paper aims at carrying out a parameterization study on the OTTV equation. The window-to-wall ratio, shading coefficient, wall absorptance and wall heat capacity are found to be important parameters. Modification of the equivalent temperature that appears in the OTTV equation is recommended. Finally, the effect of overhang on the solar load value is also investigated.

Suggested Citation

  • Chow, W. K. & Chan, K. T., 1995. "Parameterization study of the overall thermal-transfer value equation for buildings," Applied Energy, Elsevier, vol. 50(3), pages 247-268.
    • Handle: RePEc:eee:appene:v:50:y:1995:i:3:p:247-268
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    References listed on IDEAS

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    1. Turiel, I. & Curtis, R. & Levine, M.D., 1985. "Analysis of energy conservation standards for Singapore office buildings," Energy, Elsevier, vol. 10(1), pages 95-107.
    2. Chow, W.K. & Chan, K.T., 1992. "Overall thermal transfer values for building envelopes in Hong Kong," Applied Energy, Elsevier, vol. 42(4), pages 289-312.
    3. Chou, S.K. & Lee, Y.K., 1988. "A simplified overall thermal transfer value equation for building envelopes," Energy, Elsevier, vol. 13(8), pages 657-670.
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    Cited by:

    1. Zingre, Kishor T. & Wan, Man Pun & Tong, Shanshan & Li, Hua & Chang, Victor W.-C. & Wong, Swee Khian & Thian Toh, Winston Boo & Leng Lee, Irene Yen, 2015. "Modeling of cool roof heat transfer in tropical climate," Renewable Energy, Elsevier, vol. 75(C), pages 210-223.
    2. Xiaojing Meng & Beibei Wei & Yingni Zhai, 2020. "Sensitivity Analysis of Envelope Design Parameters of Industrial Buildings with Natural Ventilation," Sustainability, MDPI, vol. 12(24), pages 1-12, December.
    3. Seo, Dong-yeon & Koo, Choongwan & Hong, Taehoon, 2015. "A Lagrangian finite element model for estimating the heating and cooling demand of a residential building with a different envelope design," Applied Energy, Elsevier, vol. 142(C), pages 66-79.
    4. Chua, K.J. & Chou, S.K., 2010. "Energy performance of residential buildings in Singapore," Energy, Elsevier, vol. 35(2), pages 667-678.
    5. Yu, Philip C.H. & Chow, W.K., 2001. "Energy use in commercial buildings in Hong Kong," Applied Energy, Elsevier, vol. 69(4), pages 243-255, August.
    6. Li, Danny H.W. & Wong, S.L., 2007. "Daylighting and energy implications due to shading effects from nearby buildings," Applied Energy, Elsevier, vol. 84(12), pages 1199-1209, December.
    7. Yu, Jinghua & Yang, Changzhi & Tian, Liwei & Liao, Dan, 2009. "Evaluation on energy and thermal performance for residential envelopes in hot summer and cold winter zone of China," Applied Energy, Elsevier, vol. 86(10), pages 1970-1985, October.
    8. Koo, Choongwan & Park, Sungki & Hong, Taehoon & Park, Hyo Seon, 2014. "An estimation model for the heating and cooling demand of a residential building with a different envelope design using the finite element method," Applied Energy, Elsevier, vol. 115(C), pages 205-215.
    9. Chan, K. T. & Chow, W. K., 1998. "Energy impact of commercial-building envelopes in the sub-tropical climate," Applied Energy, Elsevier, vol. 60(1), pages 21-39, May.
    10. Hwang, Ruey-Lung & Shih, Wen-Mei & Lin, Tzu-Ping & Huang, Kuo-Tsang, 2018. "Simplification and adjustment of the energy consumption indices of office building envelopes in response to climate change," Applied Energy, Elsevier, vol. 230(C), pages 460-470.
    11. Ma, Zhenjun & Wang, Shengwei, 2009. "Building energy research in Hong Kong: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 13(8), pages 1870-1883, October.
    12. Chow, W.K. & Yu, Philip C.H., 2000. "Controlling building energy use by Overall Thermal Transfer Value (OTTV)," Energy, Elsevier, vol. 25(5), pages 463-478.
    13. Yik, F.W.H & Wan, K.S.Y, 2005. "An evaluation of the appropriateness of using overall thermal transfer value (OTTV) to regulate envelope energy performance of air-conditioned buildings," Energy, Elsevier, vol. 30(1), pages 41-71.

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