An experimental work on the performance of solar cell cooled by flat heat pipe
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An experimental work on the performance of solar cell cooled by flat heat pipe Aly M. A. Soliman1,2 · Hamdy Hassan1,3 Received: 13 July 2019 / Accepted: 20 July 2020 © Akadémiai Kiadó, Budapest, Hungary 2020
Abstract This paper introduces an experimental study for concentrating solar cell performance cooled by using flat heat pipe. The cell represents the heat pipe evaporator, and the heat pipe condenser is cooled by using a rectangular finned heat sink. This study is investigated at various heat pipe condenser and adiabatic regions lengths and concentration ratios of the radiation intensity incident on the cell, and for forced and free convection airflow cooling through the finned heat sink. The required radiation energy supplied to the cell is provided by solar simulator. The findings illustrate that cell efficiency and output power increase with increasing the heat pipe condenser and decrease its adiabatic regions’ lengths. However, cell efficiency reduces with rising the incident radiation intensity. The heat pipe temperature increases with radiation intensity, but its maximum temperature difference does not change greatly with variation solar intensity. Cooling the cell by heat pipe increases its output power by 24.3% compared to free convection without utilizing heat pipe at incident energy 500 W m−2. Using forced convection with double condenser length increases the cell output power by about 9.1% compared to one heat sink for free convection at falling radiation intensity 3000 W m−2. Keywords Solar cell · Flat heat pipe · Heat sink · Performance · Cooling
Introduction One of the greatest important sustainable energy resources is the solar energy which could be utilized in various applications as solar cell, solar heating, solar cooling, heating, and power systems [1]. The cell system is able to alter the energy from solar to electrical by means of photovoltaic system. In solar cells, only twenty percent of the falling solar energy is altered to electricity, nevertheless, greater than fifty percent is transmitted to excess energy as heat. The cell temperature rising is a result of the reduction of both cell efficiency and cell power. Furthermore, the extra heat in diverse positions in the cell can influence the cell silicon layer and yields a small lifetime of the cell system. Consequently, both * Hamdy Hassan [email protected]; [email protected] 1
Energy Resources Engineering, Egypt-Japan University of Science and Technology (E-JUST), Alexandria, Egypt
2
Mechanical Engineering Department, Shoubra, Faculty of Engineering, Benha University, Cairo, Egypt
3
Mechanical Engineering Department, Faculty of Engineering, Assiut University, Assiut, Egypt
uniformity and cell temperature must be adjusted by utilizing an appropriate cooling system. The system of cooling could be categorized into active and passive systems based on the inlet power utilized in the system of cooling. Passive cooling systems don’t need inlet power, however, they have low cooling performance whereas active syste
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