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A platform for research: civil engineering, architecture and urbanism
Experimental and numerical study of the airflow and thermal characteristic of non-uniform transpired solar collector
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.
Experimental and numerical study of the airflow and thermal characteristic of non-uniform transpired solar collector
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.
Experimental and numerical study of the airflow and thermal characteristic of non-uniform transpired solar collector
Build. Simul.
Wang, Dengjia (author) / Gao, Meng (author) / Gao, Qian (author) / Liu, Yanfeng (author) / Liu, Yuan (author) / Liu, Jiaping (author)
Building Simulation ; 13 ; 1305-1319
2020-12-01
15 pages
Article (Journal)
Electronic Resource
English
non-uniform transpired solar collector , airflow and thermal characteristics , experiment , numerical simulation Engineering , Building Construction and Design , Engineering Thermodynamics, Heat and Mass Transfer , Atmospheric Protection/Air Quality Control/Air Pollution , Monitoring/Environmental Analysis
Hybrid transpired solar collector updraft tower
| British Library Online Contents | 2018
Hybrid transpired solar collector updraft tower
| British Library Online Contents | 2018
Hybrid transpired solar collector updraft tower
| British Library Online Contents | 2018
Hybrid transpired solar collector updraft tower
| British Library Online Contents | 2018
Hybrid transpired solar collector updraft tower
| British Library Online Contents | 2018