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An evaluation of the appropriateness of using overall thermal transfer value (OTTV) to regulate envelope energy performance of air-conditioned buildings

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  • Yik, F.W.H
  • Wan, K.S.Y

Abstract

This paper inquires into whether overall thermal transfer value (OTTV) is an appropriate building envelope energy performance index for use in regulatory control. First, a historical review of the use of OTTV in American Society of Heating, Refrigerating and Air-conditioning Engineers (ASHRAE) Standard 90 is presented, followed by a review of more recent work on its further development and application. The major deficiencies of OTTV are then discussed, and simulation study results meant to highlight the impacts of such deficiencies are presented. The study embraced air-conditioned office buildings and air-conditioned high-rise residential buildings in Hong Kong. Results of this study clearly show that the OTTV calculated with the use of pre-calculated coefficients may not truly reflect the thermal performance of a building envelope. Therefore, a second thought should be given to the use of OTTV in building energy codes.

Suggested Citation

  • 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.
    • Handle: RePEc:eee:energy:v:30:y:2005:i:1:p:41-71
    DOI: 10.1016/j.energy.2004.03.001
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    Cited by:

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    5. Chua, K.J. & Chou, S.K., 2010. "Energy performance of residential buildings in Singapore," Energy, Elsevier, vol. 35(2), pages 667-678.
    6. Lee, Junghun & Kim, Jeonggook & Song, Doosam & Kim, Jonghun & Jang, Cheolyong, 2017. "Impact of external insulation and internal thermal density upon energy consumption of buildings in a temperate climate with four distinct seasons," Renewable and Sustainable Energy Reviews, Elsevier, vol. 75(C), pages 1081-1088.
    7. 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.
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    9. Wong, L.T. & Mui, K.W. & Shi, K.L., 2008. "Energy impact of indoor environmental policy for air-conditioned offices of Hong Kong," Energy Policy, Elsevier, vol. 36(2), pages 714-721, February.
    10. Oliveira Panão, Marta J.N. & Camelo, Susana M.L. & Gonçalves, Helder J.P., 2011. "Assessment of the Portuguese building thermal code: Newly revised requirements for cooling energy needs used to prevent the overheating of buildings in the summer," Energy, Elsevier, vol. 36(5), pages 3262-3271.

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