Green roofs in European climates. Are effective solutions for the energy savings in air-conditioning?

被引：209
|
作者：
Ascione, Fabrizio [1 ]
Bianco, Nicola [1 ]
de'Rossi, Filippo [2 ]
Turni, Gianluca [3 ]
Vanoli, Giuseppe Peter [4 ]
机构：
[1] Univ Naples Federico II, DII Dept Ind Engn, I-80125 Naples, Italy
[2] Univ Sannio, DING Dept Engn, I-82100 Benevento, Italy
[3] Freelance, I-80125 Naples, Italy
[4] Univ Sannio, DING Dept Engn, I-82100 Benevento, Italy
来源：
APPLIED ENERGY | 2013年 / 104卷
关键词：
Green roofs; Cool roofs; European climates; Energy performances; Technical feasibility; REFLECTIVE COATINGS; THERMAL PERFORMANCE; DYNAMIC SIMULATION; BUILDING ENVELOPE; EFFICIENCY; CONSUMPTION; SYSTEMS; ALBEDO; MODEL; CITY;
D O I：
10.1016/j.apenergy.2012.11.068
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
Several studies show the potential benefits achievable by recurring to roof vegetation. Really, little literature investigates the economic feasibility of such solution. The paper verifies utility of green roofs, under environmental and energy point of views, by considering all the aspects that influence their performances. With reference to several climates, intensity of rainfalls, needs of irrigation and kind of building use, a large parametric analysis evaluates the technical and economical feasibility of green roofs applied to a modern office building, considering various vegetations and different external coatings. The scarce amount of rainfall - and thus the irrigation cost - can nullify the savings in energy demand for air-conditioning. Moreover, even if green roofs show satisfactory performance if monthly rainfalls do not imply significant additional watering - the economic investigation shows scarce convenience for well-insulated buildings, above all if the higher initial cost of a green roof, compared to traditional roofing coating, is computed. Finally, cool roofs, by means of high-reflective and high-emissive coatings, are suitable solutions in warm climates, strongly improving the summer performances, with low extra costs for installation and maintenance. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：845 / 859
页数：15
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