Field investigation of night radiation cooling under tropical climate

被引：61

作者：

Khedari, J ^{[1
]}

Waewsak, J ^{[1
]}

Thepa, S ^{[1
]}

Hirunlabh, J ^{[1
]}

机构：

[1] King Mongkuts Univ Technol, Sch Energy & Mat, Div Energy Technol, Bangkok 10140, Thailand

来源：

RENEWABLE ENERGY | 2000年 / 20卷 / 02期

关键词：

roof radiator; thermal properties; rain; water condensation; sky; clouds;

D O I：

10.1016/S0960-1481(99)00104-4

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

This paper discusses the feasibility of cooling by using night radiation under Thailand's hot and humid climate. Four types of roof radiators were made by using common construction materials. They were examined under three sky conditions: clear, cloudy and rainy, respectively. Investigation was done, mainly, based on the temperature of different surfaces of a roof radiator. The experimental results showed that the depression of different surface temperatures is in the range of 1-6 degrees C below ambient temperature under clear and cloudy skies. Under rainy skies, the temperature of different surfaces of roof radiators and ambient air was fairly close. Apart from sky conditions, the factors which affect the night radiation cooling are the thermal emissivity of materials and water condensation on the radiator surface area. Finally, this first study indicated that cooling by using night radiation is feasible mainly during tropical winter season. (C) 1999 Elsevier Science Ltd. All rights reserved.

引用

页码：183 / 193

页数：11

共 13 条

[1]

Agrawal P.C., 1989, SOL WIND TECHNOL, V6, P557, DOI [10.1016/0741-983X(89)90091-X, DOI 10.1016/0741-983X(89)90091-X]

[2]

Fardeheb F., 1987, P BIENN C INT SOL EN, P3198

[3] SOLAR HEATING AND NIGHT RADIATION COOLING BY A ROOF RADIATION TRAP [J].

GIVONI, B .

ENERGY AND BUILDINGS, 1977, 1 (02) :141-145

[4]

Givoni B., 1982, PASSIVE SOLAR J, V1, P131

[5]

GIVONI B, 1979, P 1 INT S NONC EN 27, P6

[6]

HARRISON AW, 1978, SOL ENERGY, V26, P185

[7]

HAY HR, 1969, ASHRAE J, V75, P177

[8]

HIRUNLABH J, 1997, P 1 AR MECH C 1 3 JU, P469

[9]

KHEDARI J, 1999, IN PRESS ENERGY BUIL

[10]

KREITH F, 1978, PRINCIPLES SOLAR ENG, P509

← 1 2 →