Mohd Hafizzudin Asli Sabah (2021) Effect of wire mesh on solar chimney performance in a solar PV cooling setup. Universiti Malaysia Sabah. (Unpublished)
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Abstract
The performance of the solar photovoltaic (PV) panel is greatly affected by the rise in operating temperature. Plus, due to the fact that solar panel can only harness a limited amount of energy from the irradiation of the sun, the excessive solar radiation will only contribute to heat up the solar panel which in turn causes the drop of efficiency of the solar panel. Besides, it was determined that cold inflow phenomenon occurred at the chimney’s outlet which affect the natural convection of the chimney. Hence, this study aims to provide a passive cooling mechanism of solar PV that consist of three different types of setups. It can be classified as (i) control prototype, (ii) prototype mounted with a chimney, and (iii) prototype mounted with a chimney with a wire mesh attached inside of it. Specifically, it investigates the effect of chimney and wire mesh on the performance of solar PV in terms of temperature and electrical efficiency. Furthermore, temperature distribution on the wire mesh will also be investigated to see the existence of the cold inflow. Thus, the data between a prototype that mounted with and without a wire mesh will be compared. To test the hypothesis that chimney leads to an increased electrical performance of the solar PV and wire mesh can prevent the occurrence of cold inflow which will affect the solar PV performance, an experimental investigation was carried out in the Faculty of Engineering, Universiti Malaysia Sabah. The results showed a significant effect in increasing the efficiency of solar PV while decreasing the panel temperature with the prototypes that have a chimney and wire mesh on it. However, due to unforeseen circumstance, the solar panel used in Prototype (ii) is faulty and malfunction making the comparison for the solar panel efficiency cannot be done. Fortunately, the data for the existence of cold inflow at the chimney’s outlet can still be compared between Prototype (ii) which has only a chimney with Prototype (iii), a chimney setup that equipped with a wire mesh. The results show that with the used of chimney the electrical efficiency of solar PV increased up to 15%, while the temperature was able to decrease to 15.23%. The used of wire mesh was also determined manage to minimize the effect of cold inflow or reverse flow at the exit of the the chimney by comparing the mass flow rate and air temperature between Prototype (ii) and Prototype (iii). It was found that cold inflow effect the solar chimney performance as the solar panel temperature in Prototype (ii) is higher than Prototype (iii). Hence, the best solar PV cooling setup is Prototype (iii) which has stainless-steel wire mesh installed inside of it.
| Item Type: | Academic Exercise |
|---|---|
| Keyword: | Solar photovoltaic , Wire mesh , Solar chimney |
| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK1-9971 Electrical engineering. Electronics. Nuclear engineering > TK1001-1841 Production of electric energy or power. Powerplants. Central stations |
| Department: | FACULTY > Faculty of Engineering |
| Depositing User: | DG MASNIAH AHMAD - |
| Date Deposited: | 11 Oct 2022 11:53 |
| Last Modified: | 11 Oct 2022 11:53 |
| URI: | https://eprints.ums.edu.my/id/eprint/34306 |
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