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Controlling building energy use by Overall Thermal Transfer Value (OTTV)

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  • Chow, W.K.
  • Yu, Philip C.H.

Abstract

Overall Thermal Transfer Value (OTTV) is used as a control parameter for building energy use in the Hong Kong Special Administrative Region (HKSAR). However, there are several approaches to determining the OTTV that produce quite different results. Four different methods for calculating OTTV are briefly reviewed and their formulation clarified in this paper. They are (1) the equations derived by Chow and Chan through extensive energy simulations, (2) the ASHRAE 90A-80 method, (3) the one recommended in the Hong Kong Code of Practice (HKCOP) published by the HKSAR Government, and (4) the basic definition of OTTV using data generated from computer simulations by TRACE 600. The OTTV of building envelopes is analyzed by studying the energy use of single-zone buildings with volumes varying from 4000 to 40,000 m3. Results of OTTV calculated from the four methods are compared and discussed. Method (1) is the simplest and easiest one to apply, and the results are found to be close to those simulated by computer programs. Finally, new approaches to total building energy control are described for consideration in the next revision of building energy codes.

Suggested Citation

  • 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.
    • Handle: RePEc:eee:energy:v:25:y:2000:i:5:p:463-478
    DOI: 10.1016/S0360-5442(99)00079-1
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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., 1995. "Parameterization study of the overall thermal-transfer value equation for buildings," Applied Energy, Elsevier, vol. 50(3), pages 247-268.
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    Cited by:

    1. Verda, Vittorio & Colella, Francesco, 2011. "Primary energy savings through thermal storage in district heating networks," Energy, Elsevier, vol. 36(7), pages 4278-4286.
    2. 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.
    3. 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.
    4. Radhi, H., 2009. "Can envelope codes reduce electricity and CO2 emissions in different types of buildings in the hot climate of Bahrain?," Energy, Elsevier, vol. 34(2), pages 205-215.
    5. Chua, K.J. & Chou, S.K., 2010. "Energy performance of residential buildings in Singapore," Energy, Elsevier, vol. 35(2), pages 667-678.
    6. 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.
    7. 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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