Influence of porous media on the performance of hybrid PV/Thermal collector

Ahmed, Omer K.; Mohammed, Zala Aziz

doi:10.1016/j.renene.2017.05.061

Cited by 87 publications

(34 citation statements)

References 15 publications

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“…The coverage ratio of PV glazing is defined as: e = A pv / A glass (1) where A pv is the area of PV cells, and A glass is the area of PV glazing. Jiang et al [28] concluded that with the increase of coverage ratio, the thermal efficiency Recent Advances in Photovoltaic-Trombe Wall System: A Review DOI: http://dx.doi.org /10.5772/intechopen.90618 and room temperature of the PV-TW decreased, but the electrical power and the total efficiency of PV/TW increased.…”

Section: Effect Of the Coverage Ratiomentioning

confidence: 99%

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Recent Advances in Photovoltaic-Trombe Wall System: A Review

Ahmed¹

2021

Renewable Energy - Technologies and Applications

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Management of energy consumption for building's air conditioning is a vital issue for resource saving and environmental protection. The use of solar energy to generate electricity by solar cells is essential nowadays. However, the disadvantage of solar panels is the elevated temperature in work, especially in the hot sunny climate that leads to efficiency decline. Also, there is a problem with heating during the night and cloudy days. For the last 20 years, there has been a rapid development in the field of integrated solar technologies. A hybrid PV/Trombe wall (PV/ TW) system suggested being an efficient and durable conversion system of solar energy. The design of the PV/TW system considered one of the focusing areas of the present research to make it more economically feasible. The idea of building the photovoltaic-Trombe wall has appeared as one of the green technologies. Several published works at that time are included for integrating PV/TW system. This chapter devoted to reviewing the theoretical and practical studies conducted on this system for developing and improving electrical and thermal performance.

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Section: Effect Of the Coverage Ratiomentioning

confidence: 99%

“…Today mankind is facing the problem of severe shortage of power supply as a result of current consumption rate and low conventional energy reserves [1,2]. Increased human activity has led to increased energy consumption and reduced conventional fuel reserves to dangerous levels, leading to the high price of world oil [3].…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in Photovoltaic-Trombe Wall System: A Review

Ahmed¹

2021

Renewable Energy - Technologies and Applications

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“…In addition, using fins will enhance the overall efficiency of the PVT system. Moreover, Ahmed and Mohammed investigated experimentally the influence of porous media on the efficiency of the PVT system. It was found that the hybrid solar collector with porous media is more thermally efficient than the one with no porous media.…”

Section: Introductionmentioning

confidence: 99%

Performance of a hybrid photovoltaic/thermal system utilizing water‐Al ₂ O ₃ nanofluid and fins

Hader

Al‐Kouz

2018

Int J Energy Res

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Summary Innovative hybrid solar panels combining photovoltaic cells along with an efficient heat exchanger with attached fins to the parallel plates and water‐Al2O3 nanofluid as a working fluid is presented in this work. Twenty‐seven fins at the upper wall and 27 fins at the lower wall in labyrinth arrangement are used in simulations with fin lengths of 0, ¼, ½, and ¾ of the flow path height. Moreover, nanosolid particles dispersed in the base fluid range as 0 ≤ ϕ ≤ 0.2. In addition, Reynolds number Re at the inlet was varied such that 10 < Re < 80. Numerical finite element analysis using COMSOL software is utilized to investigate flow and thermal characteristics as well the overall efficiency of the hybrid system. Results show that as the Reynolds number, the length of the fin, and the volume fraction of the nanosolid particles increase, the overall efficiency increases. Moreover, increasing nanoparticle volume fraction and the fin length was found to increase the friction coefficient.

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“…The use of solar energy to generate electricity is one of the most important applications at the present time as these cells convert solar energy into a constant current [1]. However, the disadvantage of these cells is the high temperature during work, especially in hot sunny climates as in the Middle East which is characterized by a hot climate for most days of the year.…”

Section: Introductionmentioning

confidence: 99%

The combined effect of nanofluid and reflective mirrors on the performance of PV/thermal solar collector

Khalil¹,

Mohammed²

2018

Therm sci

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A photovoltaic/thermal solar collector is a system which is capable of producing both electricity and thermal energy. However, this technology still needs more studies. In this paper, a mathematical model was presented to study the performance of a photovoltaic/thermal collector by using the upper and lower reflectors with the presence of glass cover. Water and nanofluids (AL 2 O 3-H 2 O) were used as cooling medium. A computer program was proposed to calculate the amount of solar radiation reflected on the reflected mirrors and then absorbed by the hybrid collector and study the effect of nanofluid on the performance of the system. Solar radiation absorbed by the collector can be increased using the upper and lower reflectors to 1138 W/m 2 while it can reach 950 W/m 2 with the upper reflector and 746 W/m 2 with the lower reflector. It was noticed that when using reflective mirrors, the outlet water temperature increased by 21.7%. Meanwhile, the outlet water temperature increased by 0.44% when nanofluid was used as a cooling medium. The average of daily thermal efficiency as a result of using two reflectors without nanofluid was 62.1%, while the thermal efficiency was 59.735% without using any reflector, meaning a positive effect of using reflectors on the thermal efficiency. The electrical efficiency reduced with the existence of the reflective mirrors, whereas the daily average of the total electrical efficiency without the reflective mirror and using the nanofluid was (14.6%), while with a reflective mirror and using nanofluid, the daily average was (13.67%).

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Influence of porous media on the performance of hybrid PV/Thermal collector

Cited by 87 publications

References 15 publications

Recent Advances in Photovoltaic-Trombe Wall System: A Review

Recent Advances in Photovoltaic-Trombe Wall System: A Review

Performance of a hybrid photovoltaic/thermal system utilizing water‐Al ₂ O ₃ nanofluid and fins

The combined effect of nanofluid and reflective mirrors on the performance of PV/thermal solar collector

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Influence of porous media on the performance of hybrid PV/Thermal collector

Cited by 87 publications

References 15 publications

Recent Advances in Photovoltaic-Trombe Wall System: A Review

Recent Advances in Photovoltaic-Trombe Wall System: A Review

Performance of a hybrid photovoltaic/thermal system utilizing water‐Al 2 O 3 nanofluid and fins

The combined effect of nanofluid and reflective mirrors on the performance of PV/thermal solar collector

Contact Info

Product

Resources

About

Performance of a hybrid photovoltaic/thermal system utilizing water‐Al ₂ O ₃ nanofluid and fins