Green and cool roofs' urban heat island mitigation potential in tropical climate

被引:159
作者
Yang, Junjing [1 ]
Kumar, Devi Ilamathy Mohan [1 ]
Pyrgou, Andri [2 ]
Chong, Adrian [1 ]
Santamouris, Mat [1 ,3 ]
Kolokotsa, Denia [4 ]
Lee, Siew Eang [1 ]
机构
[1] Natl Univ Singapore, Dept Bldg, Singapore, Singapore
[2] Cyprus Inst, Energy Environm & Water Res Ctr, POB 27456, CY-1645 Nicosia, Cyprus
[3] Univ New South Wales, Fac Built Environm, Sydney, NSW, Australia
[4] Tech Univ Crete, Environm Engn Dept, Khania, Greece
基金
欧盟地平线“2020”;
关键词
Green roof; Cool roof; Tropical climate; Energy efficiency; Mitigation potential; ENERGY PERFORMANCE; BUILDINGS; QUALITY; IMPACT; CITIES;
D O I
10.1016/j.solener.2018.08.006
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
Urban heat island (UHI) can significantly affect building's thermal-energy performance. Urban materials absorb solar and infrared radiation and the accumulated heat is dissipated in the atmosphere increasing further the air temperature. Roofs are envelope components which with advanced solutions such as cool roofs or green roofs can provide significant energy savings in air-conditioned buildings and improved indoor thermal conditions. By means of dynamic simulations in EnergyPlus software a numerical comparative analysis between these two solutions was done in a tropical climate like Singapore's, taking into account climatological, thermal, optical and hydrological variables. Simulations of a typical summer day in Singapore were assessed to determine (i) UHI reductions for different green/cool roof scenarios; (ii) the diurnal heat fluxes dynamics and (iii) the buildings' thermal energy reduction for the investigated cases. The results show that during peak periods (9 am to 5 pm) cool roofs reduce heat gain by about 0.14 KWh/m(2) (8%) and green roofs mitigate considerably less to about 0.008 KWh/m(2) (0.4%). And for the whole of a summer design day, cool and green roof reduces heat gain by 15.53 (37%) and 13.14 (31%) KWh/m(2) respectively. The numerical simulation results confirm that an appropriate selection of roof materials contribute to the reduction of the negative effects of UHI but experimental data for air-conditioned buildings are yet to be carried out.
引用
收藏
页码:597 / 609
页数:13
相关论文
共 41 条
[1]   Energy effects of heat-island reduction strategies in Toronto, Canada [J].
Akbari, H ;
Konopacki, S .
ENERGY, 2004, 29 (02) :191-210
[2]   Evolution of Cool-Roof Standards in the US [J].
Akbari, Hashem ;
Levinson, Ronnen .
ADVANCES IN BUILDING ENERGY RESEARCH, 2008, 2 (01) :1-32
[3]  
ANDRADE L. L., 2007, ANAIS S BRASILEIRO S
[4]   Modelling the energy demand projection of the building sector in Greece in the 21st century [J].
Asimakopoulos, D. A. ;
Santamouris, M. ;
Farrou, I. ;
Laskari, M. ;
Saliari, M. ;
Zanis, G. ;
Giannakidis, G. ;
Tigas, K. ;
Kapsomenakis, J. ;
Douvis, C. ;
Zerefos, S. C. ;
Antonakaki, T. ;
Giannakopoulos, C. .
ENERGY AND BUILDINGS, 2012, 49 :488-498
[5]   An effective screening design for sensitivity analysis of large models [J].
Campolongo, Francesca ;
Cariboni, Jessica ;
Saltelli, Andrea .
ENVIRONMENTAL MODELLING & SOFTWARE, 2007, 22 (10) :1509-1518
[6]   Modifications in energy demand in urban areas as a result of climate changes: an assessment for the southeast Mediterranean region [J].
Cartalis, C ;
Synodinou, A ;
Proedrou, M ;
Tsangrassoulis, A ;
Santamouris, M .
ENERGY CONVERSION AND MANAGEMENT, 2001, 42 (14) :1647-1656
[7]  
Chow W. T. L., 2006, INT J CLIMATOL, P2011, DOI [10.1002/joc, DOI 10.1002/JOC]
[8]   Energy savings in buildings or UHI mitigation? Comparison between green roofs and cool roofs [J].
Costanzo, V. ;
Evola, G. ;
Marletta, L. .
ENERGY AND BUILDINGS, 2016, 114 :247-255
[9]   Passive cooling of outdoor urban spaces. The role of materials [J].
Doulos, L ;
Santamouris, M ;
Livada, I .
SOLAR ENERGY, 2004, 77 (02) :231-249
[10]   Uncertainty and sensitivity decomposition of building energy models [J].
Eisenhower, Bryan ;
O'Neill, Zheng ;
Fonoberov, Vladimir A. ;
Mezic, Igor .
JOURNAL OF BUILDING PERFORMANCE SIMULATION, 2012, 5 (03) :171-184