Cooling concentrator photovoltaic systems using various configurations of phase-change material heat sinks

Emam, Mohamed; Ahmed, Mahmoud

doi:10.1016/j.enconman.2017.12.077

Cited by 148 publications

(24 citation statements)

References 42 publications

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“…The rectangular enclosure is the most common container of thermal energy storage devices. For instance, the rectangular heatsink was used for PV [7,8], the rectangular collector device was used for solar power [9], and PCM filled in the rectangular containers integrated into the building constructs was used to store or release the thermal energy [10,11]. Due to the low heat conductivity of PCMs especially for nonmetallic PCM, many researchers presented useful technologies to improve the melting rate when the PCMs were melting in the rectangular cavities.…”

Section: Introductionmentioning

confidence: 99%

On the Melting Process of the Phase Change Material in Horizontal Rectangular Enclosures

2019

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Phase change material (PCM) is one of the most important ways to store and manage energy. The melting process of PCM in a rectangular enclosure with the different aspect ratio is frequently related to some thermal energy storage devices. In this work, the melting of PCM in the horizontal rectangular enclosures heated from the different sides and the influence of aspect ratio of the rectangle are carefully studied. The enthalpy porosity technique and the finite volume method (FVM) are used to simulate the melting process numerically. The results show that the melting process of PCM can be dominated by conduction or natural convection due to the different heated sides. The melting of PCM in the enclosure heated from the bottom side is firstly affected by conduction and then mostly influenced by convection. In addition, the aspect ratio of the rectangular enclosure is found to play an important role in the melting process. Finally, a series of fitting correlations of the liquid fraction, Nusselt number and the energy storage are presented with the influence of aspect ratios in order to provide the reference for designing the rectangular container of PCM. This study is helpful for the selection of an appropriate aspect ratio and heating method to achieve the desired energy storage performance of encapsulated PCM.

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Section: Introductionmentioning

confidence: 99%

On the Melting Process of the Phase Change Material in Horizontal Rectangular Enclosures

2019

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“…This resulted in an overall efficiency improvement of 15% compared to water cooling. A simulation study was conducted by Emam et al [21] to study the effect of various configurations of PCM like single cavity, three and five parallel cavity and three series cavity, on the average temperature and local temperature of the PV cell. The results reported that the five parallel cavity achieved the lowest temperature with 57 0 C over a time of 150 min.…”

Section: Heat Dissipation/cooling Methodsmentioning

confidence: 99%

“…Under concentrated light, the power output of the PV cells increase, due to the increase of solar radiation. But this is accompanied with increase in temperature, which leads to a decrease in efficiency of the PV cells as represented in the Eq.9 [21]:…”

Section: Photovoltaic Cellsmentioning

confidence: 99%

Concentrated photovoltaic thermal systems: A component-by-component view on the developments in the design, heat transfer medium and applications

George

Pandey

Rahim

et al. 2019

Energy Conversion and Management

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Concentrated Photovoltaic (CPV) is an attractive alternative to fossil fuels due to its ability to reduce the PV cell area and increase the energy outputs using low cost optics. This review paper, details the recent experimental and simulation studies conducted in the field related to CPV in the past few years. The paper details the general expressions used for experimental works, followed by sections detailing the studies conducted on the optics, photovoltaics, heat dissipation and integration application. Different designs proposed by the researchers has also been briefly described. The findings shows the potential for CPV and CPV/T systems is promising with overall efficiencies greater than 60%.

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“…'liquid-vapour interface in heat pipes' and solid 'liquid interface'. They are frequently placed in a container, firmly attached to the rear side of the panel [13][14][15][16][17]. For PCMs (phase change materials), the commonly used material is paraffin wax (RT) with different melting points, depending on various atmospheric temperatures.…”

Section: Introductionmentioning

confidence: 99%

Experimental study for thermal regulation of photovoltaic panels using saturated zeolite with water

2019

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This paper presents a novel experimental work for cooling photovoltaic panels using water saturated zeolite/activated alumina. Different system configurations, with 4 different zeolite thicknesses, were tested indoor. Moreover, the zeolite was tested with different added components (fins and metal mesh/particles) for enhancing the system performance. Three different radiations intensities were set for a period of 6 hours and the results were compared with the uncooled system. The experimental results showed a significant solar panels temperature reduction of approximately 14.9°C and 9 °C for radiation intensities of 600 and 1000 W/m 2 respectively. The expected electrical efficiency, according to this temperature reduction, was calculated and an average enhancement of 10% and 7% at radiation of 600 and 1000 W/m 2 intensity respectively was estimated.

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Cooling concentrator photovoltaic systems using various configurations of phase-change material heat sinks

Cited by 148 publications

References 42 publications

On the Melting Process of the Phase Change Material in Horizontal Rectangular Enclosures

On the Melting Process of the Phase Change Material in Horizontal Rectangular Enclosures

Concentrated photovoltaic thermal systems: A component-by-component view on the developments in the design, heat transfer medium and applications

Experimental study for thermal regulation of photovoltaic panels using saturated zeolite with water

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