Experimental and numerical study of the airflow and thermal characteristic of non-uniform transpired solar collector

• 作者: Dengjia Wang Jiaping Liu Meng Gao Qian Gao Yanfeng Liu Yuan Liu
• 来源期刊: 建筑模拟（英文版）
• 年，卷（期）: 2020,（6）
• 所属期刊栏目: BUILDING SYSTEMS AND COMPONENTS
• 页码范围: 1305-1319
• 页数: 15页
• 语种: 英文

摘要

A transpired solar-collector is a device, which is attached to building walls, that uses solar energy to provide preheated fresh outdoor-air before it is drawn into the building through the ventilation system. A transpired collector consists of a heat-collection plate with infiltration holes, an air layer, an air outlet, and other auxiliary components. A transpired solar collector with non-uniform holes is investigated in this paper, and a physical model for it is developed. The model is then simplified to enable effective simulation and subsequently verified by experiments to evaluate the reliability of the simulation results. Furthermore, a multi-factor sensitivity analysis of a transpired solar collector, with respect to airflow and thermal characteristics, is performed using a numerical simulation. In addition, the application of the device is combined with the thermal requirements of the actual building. The results show that the air-layer thickness has the strongest effect on the heat-collection efficiency, which can be increased to 93％ when thickness is 30 mm and height ratio is 0.30. This effect is obvious only in the case of non-uniform perforation. Although a high air-velocity can increase the daily heat-exchange by 595.2 W, the average daily air-supply temperature decreases by 34.2 °C. Even though the temperature-target may not be reached when more fresh air is introduced, the reduction of the fresh air heating-load is substantial.

作者信息

序号	姓名	单位	发文数	被引次数	H指数	G指数
1	Dengjia Wang		1	0	0.0	0.0
2	Meng Gao		1	0	0.0	0.0
3	Qian Gao		1	0	0.0	0.0
4	Yanfeng Liu		1	0	0.0	0.0
5	Yuan Liu		1	0	0.0	0.0
6	Jiaping Liu		1	0	0.0	0.0