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Open AccessArticle

Thermal Study on Extensive Green Roof Integrated Irrigation in Northwestern Arid Regions of China

Department of Municipal Engineering, School of Civil Engineering, Southeast University, Nanjing 210096, China
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Water 2017, 9(11), 810; https://doi.org/10.3390/w9110810
Received: 24 August 2017 / Revised: 17 October 2017 / Accepted: 19 October 2017 / Published: 9 November 2017
(This article belongs to the Special Issue Sponge Cities: Emerging Approaches, Challenges and Opportunities)
Selection of xerophils and drought tolerant plants is highly crucial in green roof techniques in the drought prone regions of Northwest China. In this study, the thermal performance under the natural conventional climate in summer was analyzed using a self-made simulation experimental platform through comparison of the internal surface temperature with and without green roofs. The distribution frequency of internal surface temperature was investigated by dividing internal surface temperature into several ranges. Statistical analysis showed that the frequency of internal surface temperature lower than 33 °C for green roofs was 91.8%, about 1.09 times higher than that for non-green roofs, and that the sum of internal surface temperature exceeding 35 °C was about one third of that for non-green roofs. The results proved that green roofs have a significant insulation effect. Moreover, the thermal insulation property of green roofs had a strong positive relation with outside temperature. The thermal insulation characteristic was improved as the outdoor temperature increased, additionally, it had a better insulation effect within two hours after irrigation. View Full-Text
Keywords: thermal insulation; extensive green roof; irrigation; arid regions thermal insulation; extensive green roof; irrigation; arid regions
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Wang, Y.; Singh, R.P.; Fu, D.; Zhang, J.; Zhou, F. Thermal Study on Extensive Green Roof Integrated Irrigation in Northwestern Arid Regions of China. Water 2017, 9, 810.

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