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Experimental study of the thermal performance of an extensive green roof on sunny summer days

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  • Tang, Mingfang
  • Zheng, Xing

Abstract

Green roofs have shown a remarkable effect on the reduction of the building cooling load in summer. The assessment of the thermal performance of green roofs is essential for their design and evaluation. This study investigated the thermal characteristics of an extensive green roof under air-conditioned and non-air-conditioned states by using experimental data obtained on successive sunny summer days. Two indices of the green roof, namely the equivalent thermal resistance and the equivalent decrement factor, were estimated through comparison with a common bare roof. Under the non-air-conditioned state, the distribution of the average temperature on the green roof profile was S-sharp. The lowest average temperature of the green roof was observed on the interface between the planting soil and roof structure, which were 1.8 and 0.9 °C below the outdoor and indoor air temperature, respectively. This finding indicated that the bottom of the soil layer functioned as a “cooling source” that absorbed heat from the upside and downside. The indoor critical air temperature that maintains the heat flux equal to zero was investigated on the basis of the experimental data. The influence of indoor critical air temperature on the equivalent thermal resistance was discussed; for the same green roof under the same outdoor climatic conditions, an indoor air temperature that is closer to the indoor critical air temperature yields a higher equivalent thermal resistance. Therefore, the equivalent thermal resistance of the green roof obtained under low indoor air temperature is recommended for practical use.

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  • Tang, Mingfang & Zheng, Xing, 2019. "Experimental study of the thermal performance of an extensive green roof on sunny summer days," Applied Energy, Elsevier, vol. 242(C), pages 1010-1021.
    • Handle: RePEc:eee:appene:v:242:y:2019:i:c:p:1010-1021
    DOI: 10.1016/j.apenergy.2019.03.153
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    1. Vijayaraghavan, K., 2016. "Green roofs: A critical review on the role of components, benefits, limitations and trends," Renewable and Sustainable Energy Reviews, Elsevier, vol. 57(C), pages 740-752.
    2. Berardi, Umberto & GhaffarianHoseini, AmirHosein & GhaffarianHoseini, Ali, 2014. "State-of-the-art analysis of the environmental benefits of green roofs," Applied Energy, Elsevier, vol. 115(C), pages 411-428.
    3. Chemisana, D. & Lamnatou, Chr., 2014. "Photovoltaic-green roofs: An experimental evaluation of system performance," Applied Energy, Elsevier, vol. 119(C), pages 246-256.
    4. Yang, An-Shik & Juan, Yu-Hsuan & Wen, Chih-Yung & Chang, Chao-Jui, 2017. "Numerical simulation of cooling effect of vegetation enhancement in a subtropical urban park," Applied Energy, Elsevier, vol. 192(C), pages 178-200.
    5. Santamouris, M. & Pavlou, C. & Doukas, P. & Mihalakakou, G. & Synnefa, A. & Hatzibiros, A. & Patargias, P., 2007. "Investigating and analysing the energy and environmental performance of an experimental green roof system installed in a nursery school building in Athens, Greece," Energy, Elsevier, vol. 32(9), pages 1781-1788.
    6. Ouldboukhitine, Salah-Eddine & Belarbi, Rafik & Sailor, David J., 2014. "Experimental and numerical investigation of urban street canyons to evaluate the impact of green roof inside and outside buildings," Applied Energy, Elsevier, vol. 114(C), pages 273-282.
    7. Jim, C.Y., 2014. "Air-conditioning energy consumption due to green roofs with different building thermal insulation," Applied Energy, Elsevier, vol. 128(C), pages 49-59.
    8. Coma, Julià & Pérez, Gabriel & Solé, Cristian & Castell, Albert & Cabeza, Luisa F., 2016. "Thermal assessment of extensive green roofs as passive tool for energy savings in buildings," Renewable Energy, Elsevier, vol. 85(C), pages 1106-1115.
    9. Mazzeo, D. & Oliveti, G. & Arcuri, N., 2016. "Influence of internal and external boundary conditions on the decrement factor and time lag heat flux of building walls in steady periodic regime," Applied Energy, Elsevier, vol. 164(C), pages 509-531.
    10. Ascione, Fabrizio & Bianco, Nicola & de’ Rossi, Filippo & Turni, Gianluca & Vanoli, Giuseppe Peter, 2013. "Green roofs in European climates. Are effective solutions for the energy savings in air-conditioning?," Applied Energy, Elsevier, vol. 104(C), pages 845-859.
    11. Chan, A.L.S. & Chow, T.T., 2013. "Evaluation of Overall Thermal Transfer Value (OTTV) for commercial buildings constructed with green roof," Applied Energy, Elsevier, vol. 107(C), pages 10-24.
    12. Raji, Babak & Tenpierik, Martin J. & van den Dobbelsteen, Andy, 2015. "The impact of greening systems on building energy performance: A literature review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 45(C), pages 610-623.
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    4. Malwina Michalik-Śnieżek & Kamila Adamczyk-Mucha & Rozalia Sowisz & Alicja Bieske-Matejak, 2024. "Green Roofs: Nature-Based Solution or Forced Substitute for Biologically Active Areas? A Case Study of Lublin City, Poland," Sustainability, MDPI, vol. 16(8), pages 1-17, April.
    5. Bakhshoodeh, Reza & Ocampo, Carlos & Oldham, Carolyn, 2022. "Thermal performance of green façades: Review and analysis of published data," Renewable and Sustainable Energy Reviews, Elsevier, vol. 155(C).
    6. Meng Zhen & Weihan Zou & Wei Ding, 2022. "Cooling effect of roof greening with water misting in a cold region during the summer," Environment, Development and Sustainability: A Multidisciplinary Approach to the Theory and Practice of Sustainable Development, Springer, vol. 24(5), pages 7093-7114, May.
    7. Taylana Piccinini Scolaro & Enedir Ghisi & Cristina Matos Silva, 2024. "Effectiveness of Cool and Green Roofs Inside and Outside Buildings in the Brazilian Context," Sustainability, MDPI, vol. 16(18), pages 1-18, September.
    8. Sinem Yıldırım & Çimen Özburak & Özge Özden, 2023. "Green Roofs, Vegetation Types, Impact on the Thermal Effectiveness: An Experimental Study in Cyprus," Sustainability, MDPI, vol. 15(3), pages 1-19, February.

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