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夏热冬冷地区绿化屋顶节能与生态效益研究(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2018年06期
Page:
159-164
Column:
研究论文
publishdate:
2018-12-15

Article Info:/Info

Title:
Experimental study on thermal insulation performance of green roof in hot summer and cold winter area
Author(s):
YIN Wenfeng1 FENG Xiaoping1* JIA Zhemin1 LI Dongan2 SHEN Heyun3
(1.School of Environmental and Civil Engineering,Jiangnan University,Wuxi 214122, China; 2.Guangzhou LCB Biological Technology Company Limited, Guangzhou 510032, China; 3.Jiangsu LCB Biological Technology Company Limited, Wuxi 214129, China)
Keywords:
hot summer and cold winter area green roof energy saving effect ecological benefit
Classification number :
S731.2
DOI:
10.3969/j.issn.1000-2006.201801033
Document Code:
A
Abstract:
【Objective】This paper illustrates the energy-saving benefit of green roof in hot summer and cold winter area and the ecological benefits including carbon oxygen release, air purification and water conservation and energy conservation.【Method】The thermal insulation and energy-saving effect of green roof is analyzed through the contrast experiment with and without green roof, and four aspects of green roof’s ecological benefit are quantitatively analyzed. 【Result】It shows that in winter the average inside and outside surface temperature of the green roof is higher than that of the common roof by 2.5 ℃ and 5.5 ℃, the heat flux through the roof decreases by 36.4% and the average daily electricity saving quantity is 0.90(kW·h)for air conditioner. In summer, both the inside and outside surface temperature of green roof is lower than that of the common roofs by 3.1 ℃ and 5.6 ℃, respectively, the heat flux through the roof is reduced by 48.6%, the average daily electricity saving quantity is 4.23(kW·h). It indicates that the electricity saving quantity is 15.39(kW·h)/m2 every year for the air conditioner. Per unit area of green roof can create the benefit of carbon oxygen release a year is 1.887 Yuan, air purification efficiency 2.45×10-2 Yuan/(m2·a), water conservation benefit is 0.957 Yuan/(m2·a), energy-saving efficiency is 12.875 Yuan/(m2·a), emissions reduction benefit is 9.613 Yuan/(m2·a), and quantitative ecological benefits is 25.357 Yuan/(m2·a), with the dynamic payback period of 7 years. 【Conclusion】Roof greening can improve both inside and outside surface temperature of the roof in winter, and reduce the roof temperature, as well as the heat flow through the roof, reaching thermal insulation and reducing energy consumption of air conditioning energy saving effect. The ecological benefit of roof garden is remarkable, with short payback period, and it must be paid to encourage and support by the policy.

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Last Update: 2018-11-30