Performance improvement of PV/T solar collectors with natural air flow operation

Tonui, J.K.; Tripanagnostopoulos, Y.

doi:10.1016/j.solener.2007.06.004

Cited by 254 publications

(79 citation statements)

References 28 publications

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“…Since the first hybrid collector being studied, variety of studies about the PV/T system has been carried out throughout the world. The studied mostly focusing on the air and water based as the medium to the heat transfer [4][5][6][7][8] . Amongst the PV/T solar collectors that being studied, the most popular is the air type solar collector with photovoltaic module, even though it is most popular, this type of collector has less in usage compared to the water collectors [9] .…”

Section: Introductionmentioning

confidence: 99%

Hybrid Photovoltaic Thermal (PV/T) Air and Water Based Solar Collectors Suitable for Building Integrated Applications

Ibrahim¹,

Jin

Daghigh

et al. 2009

American J. of Environmental Sciences

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Problem statement: Experiments have been conducted to investigate the effect of mass flow rates on the electrical, thermal and combined of photovoltaic thermal efficiencies of the hybrid collectors. Approach: Two photovoltaic thermal solar collectors were designed and fabricated. The first collector, known as spiral flow absorber collector, designed to generate hot water and electricity. The second collector, known as single pass rectangular tunnel absorber collector designed to generate hot air and electricity. Both absorber collectors were fixed underneath the flat plate single glazing sheet of polycrystalline silicon PV module. Water was used as a heat transfer medium in spiral flow absorber collector and air for the Single pass rectangular tunnel absorber collector respectively. Results: The experiment results showed that the single flow absorber collector generates combined PV/T efficiency of 64%, electrical efficiency of 11% and power maximum achieved at 25.35 W. Moreover, Single pass rectangular tunnel absorber collector generated combined PV/T efficiency of 55%, electrical efficiency of 10% and maximum power of 22.45 W. Conclusion/Recommendations: The best mass flow rate achieved for spiral flow absorber collector is 0.011 kg sec −1 at surface temperature of 55% and 0.0754 kg sec −1 at surface temperature of 39°C for single pass rectangular collector absorber. It was recommended for PV/T system to further improve its efficiency by optimizing the contact surfaces between the solar panel (photovoltaic module) and the tubes underneath and also recommended to use other type of photovoltaic cell such as amorphous silicon cell that posses the black mat surfaces property that will improve it thermal absorption.

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Section: Introductionmentioning

confidence: 99%

Hybrid Photovoltaic Thermal (PV/T) Air and Water Based Solar Collectors Suitable for Building Integrated Applications

Ibrahim¹,

Jin

Daghigh

et al. 2009

American J. of Environmental Sciences

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“…Authors' approaches to PV/T systems vary, but these systems are usually investigated in 2 main categories, as water-hybrid and air-hybrid collectors. Some of these studies have been performed using water [1][2][3][4][5][6][7][8][9][10][11][12][13] and dual (water and air) heat exchangers [14,15].…”

Section: Literature Review and Project Approachmentioning

confidence: 99%

Modeling and performance optimization of photovoltaic and thermal collector hybrid system

Engin¹,

Çolak²

2016

Turk J Elec Eng & Comp Sci

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Abstract:In this paper, the hybrid photovoltaic/thermal collector (PV/T) system's electrical and thermal efficiency was examined by stating a mathematical model and developing a prototype of the system. To enhance the electrical efficiency, the cell temperature of the PV module was decreased with cooling and the heated fluid could be used for low heating applications. For this purpose, a PV/T system was modeled and constructed using a thermal collector placed beneath the photovoltaic panel where the excess heat and solar radiation through the transparent PV module was the input of the thermal collector. A transparent solar module was used in order to improve the total efficiency of the hybrid PV/T system by means of increasing the radiant solar energy reaching the absorber plate of the collector. The absorber plate was coated with titanium dioxide as the absorption level of the coating was higher than 95%, which increases the thermal output by 10%. We note that using TINOX coating for the absorber plate and transparent solar module had the advantage of increasing the thermal yield of the hybrid system. The influences of the dynamic parameters on the system performance, wind speed and water flow rate, were examined on a daily basis and it was observed that the wind speed had a minor effect on the performance and that forced circulation improved the thermal efficiency. The PV/T hybrid system was compared with the separate PV module and thermal collector efficiencies and the results are presented. With these improvements, the efficiency of the single cover, water type PV/T hybrid system is increased to the maximum reported value in literature.

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“…Dubey and Tiwari [3], Wolf [4], Tiwari et al [5], Tonui and Tripanagnostopoulos [6], Bhargava et al [7] have presented the main concept of photovoltaic thermal (PV/T) with the use of water or/and air as the coolant and analyzed that hybrid system. Ibrahim et al [8], Hegazy [9] have investigated the building-integrated photovoltaic (BIPV) of a wider PV module for various applications.…”

Section: Introductionmentioning

confidence: 99%

Study on electrical power output of floating photovoltaic and conventional photovoltaic

Azmi

Othman

Ruslan

et al. 2013

AIP Conference Proceedings

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Abstract. In this paper, several attempt were made to investigate the best electrical performance of a floating photovoltaic (FPV). In photovoltaic (PV) system, the electrical efficiency of the system decreases rapidly as the PV module temperature increases. Therefore, in order to achieve higher electrical efficiency, the PV module have to be cooled by removing the heat in some way. This paper presents study on a conventional photovoltaic (PV) module and floating photovoltaic (FPV) system. The objective of the study is to compare the performance of conventional PV module and FPV. At FPV, an absorber comprises of aluminum flat-box housing was attached to the back of the PV module to absorb heat. Water is used to cool the PV module by passing it under the bottom surface of the module. The system was tested under simulated solar intensity of 417 W/m 2 , 667 W/m 2 and 834 W/m 2 . Current (I) -voltage (V) curves and power (P) -voltage (V) curves of the results were analyzed. The study found that the FPV has higher efficiency and total power gain than the conventional PV module. The average PV temperature in a FPV might be lower than that for a conventional PV module, thereby increasing its electrical power output. The simplicity of the system structure and aluminum as the chosen material enabled it to reduce the installation costs for a larger scale. Applicable as heat sink, this FPV system is convenient to place on lakes, ponds or rivers.

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Performance improvement of PV/T solar collectors with natural air flow operation

Cited by 254 publications

References 28 publications

Hybrid Photovoltaic Thermal (PV/T) Air and Water Based Solar Collectors Suitable for Building Integrated Applications

Hybrid Photovoltaic Thermal (PV/T) Air and Water Based Solar Collectors Suitable for Building Integrated Applications

Modeling and performance optimization of photovoltaic and thermal collector hybrid system

Study on electrical power output of floating photovoltaic and conventional photovoltaic

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