Improving photovoltaics efficiency by water cooling: Modelling and experimental approach

Schiro, Fabio; Benato, Alberto; Stoppato, Anna; Destro, Nicola

doi:10.1016/j.energy.2017.04.164

Cited by 98 publications

(36 citation statements)

References 25 publications

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“…In addition to maintain the cell surface temperature, this method reduces the reflection of incident solar radiation. 7 In Schiro et al, 8 the authors examined different water spreading mechanism over PV panel until they achieved an acceptable uniform film. Cooling both sides of PV panel by a water spray application was experimentally investigated in Nižetić et al, 9 and it was possible to increase the electric power output.…”

Section: Introductionmentioning

confidence: 99%

Simulation of a novel hybrid solar photovoltaic/wind system to maintain the cell surface temperature and to generate electricity

2017

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Summary A hybrid solar photovoltaic/wind system is proposed and investigated theoretically. The hybrid system is based on attaching a converging inclined duct beneath the photovoltaic (PV) panels and directed upward after the end of the panels. A wind turbine is attached at the exit of the converging duct. The converging duct will capture wind currents that at its inlet and enhances these current by buoyancy effect created by the rejected heat from the panels. The mixed convection air flow is used in cooling the PV panels and in generating electricity by driving the wind turbine at the duct exit. A mathematical model is proposed to describe the system hydrodynamic and thermal behavior. In addition to the mixed convection case, the pure free convection case, when there is no wind speed, has been tested. The design of the wind duct capturing system is not included in this study, which should be carefully manufactured to eliminate the reversed flow. The simulation results show that the integration of both systems not only enhances the performance of PV cell due to the effective cooling but also generates more electric power from the inserted turbine. At low wind speeds, it is found that the ducting system helps more in cooling the panels rather than driving the wind turbine. At these low wind speeds, the buoyancy effect may have a significant effect. However, at high wind speeds, the ducting system acts in both cooling the panels and driving the turbine, and at these high speeds, the buoyancy effect is insignificant.

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Section: Introductionmentioning

confidence: 99%

Simulation of a novel hybrid solar photovoltaic/wind system to maintain the cell surface temperature and to generate electricity

2017

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“…For further details on commercially available cooling techniques and innovative ways of cooling PVs, refer to [46][47][48][49][50][51].…”

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confidence: 99%

An Experimental Investigation of a Novel Low-Cost Photovoltaic Panel Active Cooling System

Benato

Stoppato

2019

Energies

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Renewable energy sources are the most useful way to generate clean energy and guide the transition toward green power generation and a low-carbon economy. Among renewables, the best alternative to electricity generation from fossil fuels is solar energy because it is the most abundant and does not release pollutants during conversion processes. Despite the photovoltaic (PV) module ability to produce electricity in an eco-friendly way, PV cells are extremely sensitive to temperature increments. This can result in efficiency drop of 0.25%/ ∘ C to 0.5%/ ∘ C. To overcome this issue, manufacturers and researchers are devoted to the improvement of PV cell efficiency by decreasing operating temperature. For this purpose, the authors have developed a low-cost and high-performance PV cooling system that can drastically reduce module operating temperature. In the present work, the authors present a set of experimental measurements devoted to selecting the PV cooling arrangement that guarantees the best compromise of water-film uniformity, module temperature reduction, water-consumption minimization, and module power production maximization. Results show that a cooling system equipped with 3 nozzles characterized by a spraying angle of 90 ∘ , working with an inlet pressure of 1.5 bar, and which remains active for 30 s and is switched off for 120 s, can reduce module temperature by 28 ∘ C and improve the module efficiency by about 14%. In addition, cost per single module of the cooling system is only 15 €.

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“…Sedangkan pelepasan panas pada multi header lebih tinggi 19% jika dibandingkan dengan header tunggal. Schiro et al [7] mengembangkan sebuah model steady-state sebuah sistem penyemprotan air untuk mendinginkan panel surya dan melakukan pengujian eksperimental. Mereka penggunakan sebuah panel surya kapasitas 220 W berukuran 1,6 m 2 , satu pipa distribusi dengan 7 buah nosel dan sistem pemompaan air dengan tangki.…”

Section: A State Of the Artunclassified

Pengaruh Penggunaan Pendingin Air Terhadap Output Panel Surya Pada Sistem Tertutup

Widiantara¹,

Bali²,

Sugiartha³

2019

MATRIX

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Energi surya adalah sebuah sumber energi yang tidak terbatas ketersediaannya, ramah lingkungan dan di Indonesia persediannya sangat melimpah. Radiasi matahari di Indonesia rata-rata 4,8 kWh per meter persegi/hari tetapi kapasitas terpasang pada saat ini adalah 16,02 MW dan pemerintah menargetkan menjadi 6,4 GW tahun 2025. Salah satu kendala dalam penerapan pembangkit listrik tenaga surya (PLTS) adalah rendahnya efisiensi dari panel surya serta kendala dalam penyimpanannya agar dapat dipergunakan pada malam hari. Pancaran energi matahari tidak seluruhnya diubah menjadi energi dimana terdapat pula energi panas. Melihat efektifitas panel surya bekerja pada suhu 25 derajat Celcius maka timbul keinginan untuk memanfaatkan panas lebih yang dihasilkan dengan mendinginkan panel surya dengan menyemprotkan air pada bagian bawah permukaannya. Hasil pengujian di dalam ruangan menunjukkan bahwa rancangan berjalan dengan baik dan diperoleh peningkatan daya luaran panel sebesar 4 W pada intensitas cahaya lampu 1000 W per meter persegi sedangkan pada intensitas cahaya yang lebih kecil yaitu 600 W per meter persegi, menunjukkan penurunan daya luaran panel sebesar 1 W. Melihat hasil tersebut penggunaan pendingin pada panel surya belum efektif karena terdapat penggunaan daya listrik untuk menghidupkan sistem pendingin sebelum panel surya mulai digunakan untuk mencapai suhu permukaan panel surya sebesar 25 derajat Celcius.

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Improving photovoltaics efficiency by water cooling: Modelling and experimental approach

Cited by 98 publications

References 25 publications

Simulation of a novel hybrid solar photovoltaic/wind system to maintain the cell surface temperature and to generate electricity

Simulation of a novel hybrid solar photovoltaic/wind system to maintain the cell surface temperature and to generate electricity

An Experimental Investigation of a Novel Low-Cost Photovoltaic Panel Active Cooling System

Pengaruh Penggunaan Pendingin Air Terhadap Output Panel Surya Pada Sistem Tertutup

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