Experimental study of active phase change cooling technique based on porous media for photovoltaic thermal management and efficiency enhancement

Wang, Yiping; Gao, Yuanzhi; Huang, Qunwu; Hu, Guohao; Zhou, Liqun

doi:10.1016/j.enconman.2019.111990

Cited by 28 publications

(5 citation statements)

References 36 publications

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“…where V m and I m are the maximum power voltage and maximum power current, respectively. The power of the cooling fans and the net power (P net ) obtained from the PV panels are calculated using the formulas below (Gholampour et al, 2014;Wang et al, 2019):…”

Section: Power Analysismentioning

confidence: 99%

“…Considering the use of DC fans in the system, the effective efficiency or overall efficiency of the PV panel system is expressed as: (Gholampour et al, 2014;Shmroukh, 2019;Wang et al, 2019).…”

Section: Energy and Exergy Analysismentioning

confidence: 99%

“…where T s is the temperature of sun which is taken as 5777 K. The exergy output and exergy power of the photovoltaic systems can be expressed as follows Wang et al, 2019)…”

Section: Energy and Exergy Analysismentioning

confidence: 99%

“…The source of renewable energy systems is the sun and radiation from the sun can be converted into electricity and thermal energy using photovoltaic (PV) panels and thermal collectors. The efficiency of solar thermal systems is between 40% and 60% while the efficiency of PV panels varies between 10% and 20% (Bashir et al, 2018;Wang et al, 2019). As in every system, it is desirable for PV panels to work efficiently.…”

Section: Introductionmentioning

confidence: 99%

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Energy, Exergy and Sustainability Indicators of Photovoltaic Panel Cooling under Forced Convection

BAYRAK

2022

Erzincan Üniversitesi Fen Bilimleri Enstitüsü Dergisi

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Photovoltaic (PV) panels generate some of their energy as waste heat while converting solar radiation into electricity. This heat in photovoltaic panels adversely affects the output parameters of the panels. For this reason, there are many studies on cooling of PV panels in the literature. In this experimental study, waste heat was removed by placing DC fans with different numbers and different consumption power on 80 W monocrystalline panels. According to the results obtained from the experiments, while the net power of the reference panel was 62.42W, the net power of the E4 system (with 4 fans and the consumption power of the fans was 10W) was measured as 64.1W. The highest exergy efficiency and sustainability index values among all systems were also obtained from the E4 system.

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Section: Power Analysismentioning

confidence: 99%

Section: Energy and Exergy Analysismentioning

confidence: 99%

“…where T s is the temperature of sun which is taken as 5777 K. The exergy output and exergy power of the photovoltaic systems can be expressed as follows Wang et al, 2019)…”

Section: Energy and Exergy Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Energy, Exergy and Sustainability Indicators of Photovoltaic Panel Cooling under Forced Convection

BAYRAK

2022

Erzincan Üniversitesi Fen Bilimleri Enstitüsü Dergisi

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“…In a numerical study, Mousavi et al (2018) revealed that a PV-T system with a phase-change material (PCM) and a copper foam can reach as high as 83% thermal efficiency. Wang et al (2019) adopted porous media for cooling a PV system and obtained an increase in the electrical efficiency of 19% with a uniform temperature distribution with a maximum temperature difference of 5°C. For a PV-Trombe wall hybris system, Ahmed et al (2019) used a porous medium to check the possibility of heat transfer augmentation and found an increase of 13% and 4% in the electrical and thermal efficiencies, respectively.…”

Section: Introductionmentioning

confidence: 99%

On the forced convective flow inside thermal collectors enhanced by porous media: from macro to micro-channels

Dehghan

Nesaz

Pourrajabian

et al. 2021

HFF

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Purpose Aiming at finding the velocity distribution profile and other flow characteristic parameters such as the Poiseuille (Po) number, this study aims to focus on the three-dimensional forced convective flow inside rectangular ducts filled with porous media commonly used in air-based solar thermal collectors to enhance the thermal performance. The most general model for the fluid flow (i.e. the non-linear Darcy–Brinkman–Forchheimer partial differential equation subjected to slip and no-slip boundary conditions) is considered. Design/methodology/approach The general governing equations are solved analytically based on the perturbation technique and the results are validated against numerical simulation study based on a finite-difference solution over a non-uniform but structured grid. Findings The analytical velocity distribution profile based on exponential functions for the above-mentioned general case is obtained, and accordingly, expressions for the Po are introduced. It is found that the velocity distribution tends to be uniform by increasing the aspect ratio of the duct. Moreover, a criterion for considering/neglecting the nonlinear drag term in the momentum equation (i.e. the Forchheimer term) is proposed. According to the sensitivity analysis, results show that the nonlinear drag term effects on the Nusselt number are important only in porous media with high Darcy numbers. Originality/value A general analytic solution for three-dimensional forced convection flows through rectangular ducts filled with porous media for the general model of Darcy–Brinkman–Forchheimer and the general boundary condition including both no-slip and slip-flow regimes is obtained. An analytic expression to calculate Po number is obtained which can be practical for engineering estimations and a basis for validation of numerical simulations. A criterion for considering/neglecting the nonlinear drag term in the momentum equation is also introduced.

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Impact on the Performance of Solar Photovoltaic System with the Innovative Cooling Techniques

Beemkumar

Kumar²,

Dhass

et al. 2021

Green Energy and Technology

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Experimental study of active phase change cooling technique based on porous media for photovoltaic thermal management and efficiency enhancement

Cited by 28 publications

References 36 publications

Energy, Exergy and Sustainability Indicators of Photovoltaic Panel Cooling under Forced Convection

Energy, Exergy and Sustainability Indicators of Photovoltaic Panel Cooling under Forced Convection

On the forced convective flow inside thermal collectors enhanced by porous media: from macro to micro-channels

Impact on the Performance of Solar Photovoltaic System with the Innovative Cooling Techniques

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