An innovative solution to the overheating problem of PV panels

Abd-Elhady, M.S.; Serag, Z.; Kandil, Hamdy A.

doi:10.1016/j.enconman.2017.12.017

Cited by 62 publications

(31 citation statements)

References 23 publications

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“…An innovative solution related to the passive cooling of free‐standing PV panels was proposed in Abd‐Elhady et al In the previously mentioned study, the main idea was to perforate the PV panel with holes that will ensure more intense air flow from back side to front side and thus enable a reduction in PV panel operating temperature. In Athienitis et al, the integration of air open‐loop PV thermal systems was investigated for the case of high‐rise buildings (ie, building integrated PVs, BIPV).…”

Section: Introductionmentioning

confidence: 99%

Further progress in the research of fin‐based passive cooling technique for the free‐standing silicon photovoltaic panels

et al. 2019

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Summary The paper deals with a passive air‐based cooling technique of photovoltaic (PV) panels in operating conditions. Cooling technique is done by specific type of using aluminium fins, and its main purpose is to increase the electrical efficiency of the PV panel. An increase in electrical efficiency can be achieved because of temperature degradation effect, where the PV panel yields less power at higher operating temperatures (the PV panel's efficiency can drop by up to 0.5%/°C). To confirm a cooling technique, a medium‐sized PV system was used in a 2‐month experiment. The experiment was done in realistic operating conditions, and all working parameters were thoroughly measured. After the analysis of the data, no significant raise in electrical efficiency was recorded throughout the experiment. A numerical approach was conducted, based on gained experimental data. Developed numerical model gave explanations of experimental results and provided an insight in heat flow through the PV cell. Later on, developed numerical model was used to propose new cooling variations of the fin‐based technique and to further examine the overall potential of air based passive cooling techniques. It was shown that cooling effect by up to 5°C is a realistic expectation for this technique in described operating conditions.

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Section: Introductionmentioning

confidence: 99%

Further progress in the research of fin‐based passive cooling technique for the free‐standing silicon photovoltaic panels

et al. 2019

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“…The change of the standard PV panel architecture is an interesting passive cooling approach, since convectional market PV technologies are considered with the proposal of specific modifications that would improve PV panel performance. The modification of existing PV panel architecture was proposed in [38] with the introduction of holes (perforations) on the front side of the PV panel, Fig. 20 of PV panel, [38] The impact of the number of holes was also examined (simulations and experimental results) and the results directed that the number of holes should be optimized (as well as diameter of holes), Fig.…”

Section: Liquid Immersion Methodsmentioning

confidence: 99%

“…The modification of existing PV panel architecture was proposed in [38] with the introduction of holes (perforations) on the front side of the PV panel, Fig. 20 of PV panel, [38] The impact of the number of holes was also examined (simulations and experimental results) and the results directed that the number of holes should be optimized (as well as diameter of holes), Fig. 21.…”

Section: Liquid Immersion Methodsmentioning

confidence: 99%

THERMAL MANAGEMENT OF SILICON PHOTOVOLTAIC PANELS: A REVIEW (In the press)

Nižetić¹

2020

REFFIT

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Photovoltaic (PV) technologies represent a key role in the ongoing energy transition towards the decarbonisation of convectional power systems and to reduce the harmful population impact to environment. Nowadays, the majority of market available photovoltaic PV technologies are silicon based with a usual energy conversion efficiency of less than 20%. The major drawbacks of the widely used silicon PV technologies are related to performance degradation due to aging as well as performance drops that occur during periods of elevated operating temperatures. In order to improve performance, as well as the lifetime of the PV systems, various cooling techniques have been investigated in the last two decades. The main goal of the specific cooling approaches for PV panels is to ensure efficient thermal management, as well as economic suitability. In this review paper, different cooling strategies are categorized, discussed and thoroughly elaborated in order to provide deep insight related to an expected performance improvement and economic viability. The main results of this review indicate that the cooling approaches for PVs can ensure a performance improvement ranging from about 3% up to 30%, depending if passive or active cooling approaches are applied. The main results also indicate that the economic viability as well as environmental suitability of the specific cooling approaches is not sufficiently discussed in the existing research literature.

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“…Many studies have been carried out on the cooling of PV systems to determine which cooling technique is more promising in providing the highest efficiency of the panel [10][11]. Hybrid Photovoltaic/Thermal (PV/T) solar system is one of the most popular methods for cooling the photovoltaic panels nowadays [12][13][14].…”

Section: Cooling Techniquesmentioning

confidence: 99%

Feasibility of Cooling a Photovoltaic Fresnel System by Water Spraying

Shenouda

Abd-Elhady

Kandil

2020

ARFMTS

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The Fresnel system can achieve high electrical energy yield compared to the traditional photovoltaic (PV) panel techniques due to the concentration of solar energy. However, this huge energy might cause overheating of the PV panel. The objective of this research is to mathematically model a linear Fresnel system that is cooled by either spraying the PV panel by tap water or chilled water, in order to determine the maximum possible concentration ratio, which is called the critical concentration ratio. Then, the model is further used to study the effect of cooling on the PV panel in real life operating conditions in two cities; the first one is a hot city which is Cairo, Egypt, and the other one is a cold city which is Stuttgart, Germany. The objective is to find out the Critical concentration ratio (Cr) at which the maximum energy output from the system can occur as a function of the operating conditions. The results of this study show that cooling of the PV panels using chilled water system is not feasible. Therefore, in order to improve the feasibility, a low energy cooling system should be adopted. Such system may include spraying tap water on the PV panels, recollecting the water and cooling it naturally underground and finally spraying it again on the panels. The maximum output energy has increased by approximately 75%, compared to the nocooling case, due to water spraying, which indicates the feasibility of water spraying in Fresnel systems.

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An innovative solution to the overheating problem of PV panels

Cited by 62 publications

References 23 publications

Further progress in the research of fin‐based passive cooling technique for the free‐standing silicon photovoltaic panels

Further progress in the research of fin‐based passive cooling technique for the free‐standing silicon photovoltaic panels

THERMAL MANAGEMENT OF SILICON PHOTOVOLTAIC PANELS: A REVIEW (In the press)

Feasibility of Cooling a Photovoltaic Fresnel System by Water Spraying

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