Assessment of condensation and thermal control in a photovoltaic panel by PV/T and ground heat exchanger

Reda, Mayameen N.; Spinnler, M.; Al-Kayiem, Hussain H.; Sattelmayer, Thomas

doi:10.1016/j.solener.2021.05.004

Cited by 14 publications

(13 citation statements)

References 28 publications

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“…In other words, if the panel temperature increases, the panel power decreases. Many studies [13][14][15][16][17] and postgraduate theses [18][19][20] have been carried out both to examine the negative effects of temperature on panel efficiency and to eliminate these negative effects. The variation of panel power depending on temperature is given in Eq.-2 and Eq.-3 [21].…”

Section: Methodsmentioning

confidence: 99%

Power Generation Variation Analysis Of Solar Panels Coated With TiO2

Öztürk

DENER

2022

Türk Doğa Ve Fen Dergisi

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Solar energy, which is an inexhaustible, clean and easily accessible energy source, can be converted into electrical energy with the help of photovoltaic (PV) panels. Environmental factors such as dust and dirt cause pollution of PV panels and decrease the efficiency of energy conversion. One of the methods used to reduce the negative effect of dirt on panel efficiency is to coat the surface of the panels with photocatalytic materials. Oxygen and nanoparticles are formed on photocatalytic surfaces with the help of ultraviolet rays in sunlight. These particles form a chemical reaction between the coating and the surface, breaking down and destroying the dirt on the surface. In this study, the effect of titanium dioxide (TiO2) as a photocatalytic material on the efficiency of solar panels was investigated. Experimental studies were carried out in Bingöl city using two 285 W polycrystalline solar panels. One of the panel surfaces is coated with TiO2 and no treatment has been applied to the surface of the other panel. When the measured data were analyzed, it was seen that while the powers of the two panels were almost the same at the beginning, with the contamination of the panels, the power obtained from the TiO2 coated panel was up to 19% higher. In addition, it was observed that the excess power produced as a result of cleaning the PV panels after rainy days decreased again.

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Section: Methodsmentioning

confidence: 99%

Power Generation Variation Analysis Of Solar Panels Coated With TiO2

Öztürk

DENER

2022

Türk Doğa Ve Fen Dergisi

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“…where T C -PV temperature °C; S -Solar radiation, W⁄m 2 . The temperature is taken from the average surface temperature of the upper surface and the temperature of the lower surface to calculate the temperature of the solar cell (T C ) [19][20][21]:…”

Section: The Theorymentioning

confidence: 99%

“…photovoltaic cell is a device that converts light energy into electrical energy through the photovoltaic effect [1]. Photovoltaic cells are made of materials, such as silicon, that have the ability to absorb photons from sunlight and release electrons, creating a flow of electricity [2]. These cells are connected to a solar panel to generate more power, and multiple panels can be connected to form a solar array for large-scale electricity generation.…”

Section: Introductionmentioning

confidence: 99%

Increasing the Efficiency of the Solar Cell by Using a Heat Exchanger Technique

Al-Maliki,

Abdali,

Issa

et al. 2023

Vestnik IzhGTU imeni M.T. Kalashnikova

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One of the problems that arise when generating renewable energy (using solar cells) in the world and in Iraq especially is high outside temperatures. Because of the properties of crystalline silicon used in the manufacture of solar cells, the electrical performance of solar panels is greatly affected by the operating temperature of silicon solar cells, which leads to a decrease in the energy generated by these cells increasing their temperature. In addition, to control this decrease in energy, the solar panels were cooled using a heat exchanger that uses water as a coolant. The heat exchanger technique can potentially increase the efficiency of a solar cell by using the waste heat generated during the photovoltaic process. This heat can be captured and used for pre-heating a water that is then passed through a heat exchanger, which transfers the heat to the outside. This can improve the overall efficiency of the solar cell. In this research, a copper heat exchanger has been used for cooling a solar cell and studying the effect of this cooling method on the temperature and efficiency of the PV. We used a source of light and warmth. With a halogen lamp, the results showed an accelerating manner, as the temperature of the solar cell increased, the open-circuit voltage decreased, but when using the heat exchanger, the temperature of the cell rose slowly, so the open-circuit voltage decreased slower compared to the first case during the same period, and this leads to the PV working with a higher efficiency under the same conditions.

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“…The cross-connected geometry of the buried nanochannels (height = 728 nm) offer a potential solution for a high rate of wicking, while the micropores (diameter = 2.1 μm) provided at each intersection host the sites for evaporating menisci. ,, Hence, the finding of the heat flux removal attained in such a porous nanochannels device is utilized as a technique of thermal management, and the numerical investigation of PV cooling employing an energy balance model is reported here. Finally, in the current state of the literature where the majority of the research in PV panel cooling is accomplished using a single-phase coolant, − by integration of a novel porous nanochannel on the back face of a commercial PV panel, we induce multiphase cooling accompanied with a large extent of heat transfer through phase change. We project an enhanced performance of the PV panel by such integration as compared to the typically reported values in the literature: the reduction in the temperature of the PV panel is in the range of 3–20 °C ,,, and the enhancement in the PV electrical power output is by 2–12%. ,− …”

Section: Introductionmentioning

confidence: 99%

“…Finally, in the current state of the literature where the majority of the research in PV panel cooling is accomplished using a single-phase coolant, − by integration of a novel porous nanochannel on the back face of a commercial PV panel, we induce multiphase cooling accompanied with a large extent of heat transfer through phase change. We project an enhanced performance of the PV panel by such integration as compared to the typically reported values in the literature: the reduction in the temperature of the PV panel is in the range of 3–20 °C ,,, and the enhancement in the PV electrical power output is by 2–12%. ,− …”

Section: Introductionmentioning

confidence: 99%

Thermal Management of Photovoltaics Using Porous Nanochannels

2022

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The photoelectric conversion efficiency of a solar cell is dependent on its temperature. When solar radiation is incident on a photovoltaic (PV) panel, a large portion of it is absorbed by the underlying material, which increases its internal energy, leading to the generation of heat. An overheated PV panel results in a decline in its performance, which calls for an efficient cooling mechanism that can offer an optimum output of electrical power. In the present numerical work, thermal management with a porous nanochannels device capable of dissipating a high heat flux is employed to regulate the temperature of a commercial PV panel by integrating the device on the back face of the panel. The spatial and temporal variation of the PV surface temperature is obtained by solving the energy balance equation numerically. By evaluating the steady-state PV surface temperature with and without thermal management, the extent of cooling and the resulting enhancement of the electrical power output are studied in detail. The nanochannels device is found to reduce the PV surface temperature significantly with an average cooling of 31.5 °C. Additionally, the enhancement of the electrical power output by ∼33% and the reduction in the response time to 1/8th highlight the potential of using porous nanochannels as a thermal management device. Furthermore, the numerical method is used to develop a universal curve that can predict the extent of PV cooling for any generic thermal management device.

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Assessment of condensation and thermal control in a photovoltaic panel by PV/T and ground heat exchanger

Cited by 14 publications

References 28 publications

Power Generation Variation Analysis Of Solar Panels Coated With TiO2

Power Generation Variation Analysis Of Solar Panels Coated With TiO2

Increasing the Efficiency of the Solar Cell by Using a Heat Exchanger Technique

Thermal Management of Photovoltaics Using Porous Nanochannels

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