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Thermal Performance of Green and Cool Roofs: A Field Experiment Combining Night Ventilation

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Proceedings of the 5th International Conference on Building Energy and Environment (COBEE 2022)

Part of the book series: Environmental Science and Engineering ((ESE))

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Abstract

Cool roofs, green roofs, and natural ventilation as representative passive cooling strategies are favored by many architects. However, existing studies have not fully explored the potential benefits of integrating these technologies, particularly when cool roofs or green roofs are used in combination with night ventilation. In this study, a field trial was carried out in Chongqing to assess the thermal performance of green roofs (GRs), cool roofs (CRs), aerated concrete insulated roofs (ACRs), and bare roofs (BRs) when combined with night ventilation for cooling. The results show that several functional roofs can reduce the external surface temperature of the roof structure layer by about 10 to 20 °C due to the shading effect. However, using those strategies separately has the potential to bring about poor thermal performance at night. A promising solution is combined roofing and night ventilation techniques, as the combination of these two techniques would be conducive to reduce indoor temperatures throughout the day. Nevertheless, it was concluded that a green roof is still a better roof solution than a cool roof or an insulated roof when combined with night ventilation.

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Acknowledgements

This research was supported by the Sichuan Science and Technology Plan Key R&D Projects under grant number 2020YFS0060.

Author information

Authors and Affiliations

  1. School of Architecture and Urban Planning, Chongqing University, Chongqing, China

    Jiandong Ran, Ya Feng & Mingfang Tang

  2. China Southwest Architectural Design and Research Institute Corp., Ltd, Chengdu, China

    Ya Feng & Huizhi Zhong

  3. Chen Qigao Building Science and Technology Research Center, Chongqing, China

    Ya Feng & Mingfang Tang

  4. Southwest University of Science and Technology of Civil Engineering and Architecture, Mianyang, China

    Lin Jiang

Authors
  1. Jiandong Ran
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  2. Ya Feng
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  3. Mingfang Tang
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  4. Lin Jiang
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  5. Huizhi Zhong
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Corresponding author

Correspondence to Ya Feng .

Editor information

Editors and Affiliations

  1. Centre for Zero Energy Building Studies, Concordia University, Montreal, QC, Canada

    Liangzhu Leon Wang

  2. Centre for Zero Energy Building Studies, Concordia University, Montreal, QC, Canada

    Hua Ge

  3. Department of Civil, Environmental and Architectural Engineering, University of Colorado Boulder, Boulder, CO, USA

    Zhiqiang John Zhai

  4. Department of Civil and Building Engineering, Université de Sherbrooke, Sherbrooke, QC, Canada

    Dahai Qi

  5. Centre for Zero Energy Building Studies, Concordia University, Montreal, QC, Canada

    Mohamed Ouf

  6. School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai, China

    Chanjuan Sun

  7. School of Building Services Science and Engineering, Xi’an University of Architecture and Technology, Xi’an, Shaanxi, China

    Dengjia Wang

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© 2023 The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

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Ran, J., Feng, Y., Tang, M., Jiang, L., Zhong, H. (2023). Thermal Performance of Green and Cool Roofs: A Field Experiment Combining Night Ventilation. In: Wang, L.L., et al. Proceedings of the 5th International Conference on Building Energy and Environment. COBEE 2022. Environmental Science and Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-19-9822-5_61

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  • DOI: https://doi.org/10.1007/978-981-19-9822-5_61

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  • Publisher Name: Springer, Singapore

  • Print ISBN: 978-981-19-9821-8

  • Online ISBN: 978-981-19-9822-5

  • eBook Packages: EngineeringEngineering (R0)

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