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Lighting and energy performance of solar film coating in air-conditioned cellular offices

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  • Li, Danny H.W
  • Lam, Joseph C
  • Lau, Chris C.S
  • Huan, T.W

Abstract

In subtropical Hong Kong, the principal objectives of fenestration design include eliminating direct sunlight and decreasing cooling loads. To avoid the problems of glare, excessive brightness and thermal discomfort, occupants may block the windows with internal shading devices, resulting in poor daylighting performance and very small amount of electric lighting energy savings. Recently, the advances in thin film coatings for window glass products provide a means of substantially reducing heat gain without proportionally reducing daylight transmittance. It has been suggested that film coatings together with photoelectric lighting control systems could minimise the electric lighting and cooling requirements without causing undue visual and thermal discomfort to the occupants. This paper presents field measurements on solar control film coatings in fully air-conditioned offices in Hong Kong. Solar heat gains, indoor illuminance levels and the electricity consumption by the fluorescent luminaires were systematically recorded and analysed. Measurements were made for two cellular offices, one with solar control film coating on the window glass and the other without. The findings showed that the solar film coating could cut down energy expenditures for air-conditioned buildings, especially for spaces with large glazing areas subject to substantial amount of direct sunlight. Results are presented and the design implications discussed.

Suggested Citation

  • Li, Danny H.W & Lam, Joseph C & Lau, Chris C.S & Huan, T.W, 2004. "Lighting and energy performance of solar film coating in air-conditioned cellular offices," Renewable Energy, Elsevier, vol. 29(6), pages 921-937.
    • Handle: RePEc:eee:renene:v:29:y:2004:i:6:p:921-937
    DOI: 10.1016/j.renene.2003.10.006
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    References listed on IDEAS

    as
    1. Li, D.H.W & Lam, J.C & Wong, S.L, 2002. "Daylighting and its implications to overall thermal transfer value (OTTV) determinations," Energy, Elsevier, vol. 27(11), pages 991-1008.
    2. Li, Danny H.W & Lam, Joseph C, 2000. "Measurements of solar radiation and illuminance on vertical surfaces and daylighting implications," Renewable Energy, Elsevier, vol. 20(4), pages 389-404.
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    1. 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.
    2. Li, Danny H.W. & Lam, Tony N.T. & Wong, S.L. & Tsang, Ernest K.W., 2008. "Lighting and cooling energy consumption in an open-plan office using solar film coating," Energy, Elsevier, vol. 33(8), pages 1288-1297.
    3. Carmen María Calama-González & Ángel Luis León-Rodríguez & Rafael Suárez, 2019. "Daylighting Performance of Solar Control Films for Hospital Buildings in a Mediterranean Climate," Energies, MDPI, vol. 12(3), pages 1-19, February.
    4. Huang, Yu & Niu, Jian-lei & Chung, Tse-ming, 2014. "Comprehensive analysis on thermal and daylighting performance of glazing and shading designs on office building envelope in cooling-dominant climates," Applied Energy, Elsevier, vol. 134(C), pages 215-228.
    5. Yang, Liu & Lam, Joseph C. & Tsang, C.L., 2008. "Energy performance of building envelopes in different climate zones in China," Applied Energy, Elsevier, vol. 85(9), pages 800-817, September.
    6. Krstić-Furundžić, Aleksandra & Vujošević, Milica & Petrovski, Aleksandar, 2019. "Energy and environmental performance of the office building facade scenarios," Energy, Elsevier, vol. 183(C), pages 437-447.
    7. Rahman, M.M. & Rasul, M.G. & Khan, M.M.K., 2010. "Energy conservation measures in an institutional building in sub-tropical climate in Australia," Applied Energy, Elsevier, vol. 87(10), pages 2994-3004, October.
    8. Prieto, Alejandro & Knaack, Ulrich & Klein, Tillmann & Auer, Thomas, 2017. "25 Years of cooling research in office buildings: Review for the integration of cooling strategies into the building façade (1990–2014)," Renewable and Sustainable Energy Reviews, Elsevier, vol. 71(C), pages 89-102.
    9. Henriqueta Teixeira & Maria da Glória Gomes & António Moret Rodrigues & Júlia Pereira, 2021. "In-Service Thermal and Luminous Performance Monitoring of a Refurbished Building with Solar Control Films on the Glazing System," Energies, MDPI, vol. 14(5), pages 1-23, March.
    10. Pereira, Júlia & Rivero, Cristina Camacho & Gomes, M. Glória & Rodrigues, A. Moret & Marrero, Madelyn, 2021. "Energy, environmental and economic analysis of windows’ retrofit with solar control films: A case study in Mediterranean climate," Energy, Elsevier, vol. 233(C).

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