Field and theoretical evaluation of the thermal performance of evaporative cooling porous fibre roofs

被引：0

作者：

Duan, Zhiyin ^{[1
]}

Shan, Keqin ^{[1
]}

Li, Yifan ^{[1
]}

Kang, Jiawei ^{[1
]}

机构：

[1] Beijing Univ Civil Engn & Architecture, Beijing Key Lab Heating Gas Supply Ventilating & A, Beijing 100044, Peoples R China

来源：

BUILDING AND ENVIRONMENT | 2025年 / 270卷

基金：

中国国家自然科学基金; 北京市自然科学基金;

关键词：

Evaporative cooling; Cool roof; Porous material; Building passive cooling; Field measurements; Numerical modelling; BUILDING ROOFS; IMPACT; BENEFITS; IMPROVE; SYSTEMS;

D O I：

10.1016/j.buildenv.2025.112551

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Wet porous fabric medium roofs offer superior cooling capacity compared to water-sprinkled metal roofs for lightweight buildings, presenting substantial potential for mitigating building surface temperatures, reducing cooling energy demand, and alleviating urban heat island effects. This study evaluates the cooling performance of a wet cellulose/PET composite fibre roof through field measurements in Beijing (hot and sub-humid climate), comparing it with water-sprinkled, dry white fibre and bare metal roofs. Key parameters, including external and internal surface temperatures and heat flux through the roofs, were measured. The field results show that, compared to the water-sprinkled roof, the wet fibre roof reduced external surface temperatures by up to 15 degrees C with an 11.6 W/L heat gain difference per unit water supply volume. When compared to the bare metal roof, the heat removal through the wet fabric roof ranged from 12.7 W/m2 to 914.5 W/m2 in the studied region. A numerical model was developed and validated against experimental field data to predict the cooling performance and energy-saving potential of the wet fibre roof under various climatic conditions. The Mean Absolute Error (MAE) and Root Mean Square Error (RMSE) between the numerical and experimental results were within 3 degrees C.

引用

页数：19

共 45 条

[1]

Allen R.G., 2005, Encyclopedia of Soils in the Environment, P180

[2] ENERGY SAVING THROUGH INTERMITTENT EVAPORATIVE ROOF COOLING [J].

ALTURKI, AM ;

ZAKI, GM .

ENERGY AND BUILDINGS, 1991, 17 (01) :35-42

[3]

Carbonari A., 2015, EcoEfficient Materials for Mitigating Building Cooling Needs, P215, DOI [10.1016/B978-1-78242-380-5.00008-X, DOI 10.1016/B978-1-78242-380-5.00008-X]

[4]

China Meteorological Bureau Climate Information Center Climate Data Office and Tsinghua University Department of Building Science and Technology, 2005, P CHIN STAND WEATH D

[5] CORRELATIONS FOR LAMINAR FORCED CONVECTION WITH UNIFORM HEATING IN FLOW OVER A PLATE AND IN DEVELOPING AND FULLY DEVELOPED FLOW IN A TUBE [J].