Single solar chimney technology as a natural free ventilator; energy-environmental case study for Hong Kong

被引:6
作者
Cao, Yan [1 ]
Aldawi, Fayez [2 ]
Sinaga, Nazaruddin [3 ]
Moria, Hazim [2 ]
Dizaji, Hamed Sadighi [4 ]
Wae-hayee, Makatar [5 ]
机构
[1] Xian Technol Univ, Sch Mechatron Engn, Xian 710021, Peoples R China
[2] Yanbu Ind Coll, Dept Mech Engn Technol, Yanbu Al Sinaiyah City 41912, Saudi Arabia
[3] Diponegoro Univ, Dept Mech Engn, Fac Engn, Semarang, Indonesia
[4] Univ Adelaide, Sch Mech Engn, Adelaide, SA, Australia
[5] Prince Songkla Univ, Dept Mech & Mechatron Engn, Fac Engn, Hat Yai 90112, Songkhla, Thailand
关键词
Solar chimney ventilator; Air ventilation; Tilt angle; Numerical simulation; Environmental analysis; OPTIMIZATION; PERFORMANCE; FLOW; PARAMETERS; BUILDINGS; HEIGHT; MODEL;
D O I
10.1016/j.csite.2021.101173
中图分类号
O414.1 [热力学];
学科分类号
摘要
The importance of ventilation is highlighted through the recent COVID pandemic particularly in populated societies with crowded buildings. The application of single solar chimney ventilator with and without fin, at different tilt angles, is evaluated for Hong Kong climate using transient 3D validated numerical simulation in present research from energy and environmental viewpoints. The results show that the ventilation performance of the solar chimney ventilator is significantly enhanced by selecting an optimum value for the tilt angle of the chimney. Moreover, the maximum air mass flow rate increases from 0.06 to 0.14 kg/s by reducing the tilt angle from 80 degrees to 20 degrees. Energy saving performance of the solar chimney ventilator with tilt angle of 20 degrees is around 144% higher than that of the solar chimney ventilator with the tilt angle of 80 degrees. During the morning time (sunrise to noon), the highest performance is achieved under the tilt angle of 40 degrees. From the environmental viewpoint, the solar chimney ventilator with the tilt angle of 20 degrees and 40 degrees can prevent 0.098 kg and 0.108 kg CO2 production through the morning. Prevention of the CO2 production through the afternoon is 0.209 kg and 0.151 kg for the mentioned tilt angles respectively.
引用
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页数:13
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