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Research Papers

Design Considerations of Photovoltaic/Thermal Air Systems: Energetic and Exergetic Approaches

[+] Author and Article Information
M. Gholampour

Department of Mechanical Engineering,
Faculty of Engineering,
Shahid Bahonar University,
Kerman 76169-133, Iran;
Energy and Environmental Engineering
Research Center,
Shahid Bahonar University of Kerman,
Kerman 76169-133, Iran

M. Ameri

Department of Mechanical Engineering,
Faculty of Engineering,
Shahid Bahonar University,
Kerman 76169-133, Iran;
Energy and Environmental Engineering
Research Center,
Shahid Bahonar University of Kerman,
Kerman 76169-133, Iran
e-mail: ameri_mm@mail.uk.ac.ir

1Corresponding author.

Contributed by the Solar Energy Division of ASME for publication in the JOURNAL OF SOLAR ENERGY ENGINEERING: INCLUDING WIND ENERGY AND BUILDING ENERGY CONSERVATION. Manuscript received November 13, 2013; final manuscript received November 5, 2014; published online December 23, 2014. Assoc. Editor: Werner Platzer.

J. Sol. Energy Eng 137(3), 031005 (Jun 01, 2015) (11 pages) Paper No: SOL-13-1337; doi: 10.1115/1.4029107 History: Received November 13, 2013; Revised November 05, 2014; Online December 23, 2014

Photovoltaic/thermal (PV/T) is an integrated panel simultaneously producing combined heat and electricity. In order to examine the effect of the dimensional, operational, and environmental parameters, energetic and exergetic analyses of solar PV/T air collector systems are investigated. A theoretical model has been developed and the differential equations of energy are numerically solved. To confirm the reliability and accuracy of the present solution, first, comparison studies are performed with the available data in the literature, where good agreement between the obtained values and those existing in the literature was achieved. Then by using the validated model, the effects of the presence of glass cover, packing factor, channel depth, mass flow rate, solar irradiance, collector length, and the fin’s parameters on the performance of the systems have been studied. The results show that exergy analysis is necessary for making better design decisions.

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Figures

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Fig. 1

Schematic cross-sectional view of PV/T air collectors (a) without fins and (b) with fins

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Fig. 2

Schematic of the studied PV/T air system with heat transfer coefficients

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Fig. 3

The data flow of proposed method

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Fig. 4

PV temperature, thermal, and electrical efficiency versus channel depth

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Fig. 5

Tpv versus channel depth at different packing factors

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Fig. 6

(a) ηth, (b) ηpv, (c) ηel, (d) η, (e) ηII-th, and (f) ηII versus channel depth at different packing factor

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Fig. 13

(η, ηII) versus channel depth at different fin number

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Fig. 12

(η, ηII) versus channel depth at different ratio number

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Fig. 11

(a) η and (b) ηII versus channel depth at different solar irradiances

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Fig. 10

(a) η and (b) ηII versus channel depth at different collector lengths

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Fig. 9

FP versus channel depth at different collector lengths

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Fig. 8

(a) ηth, (b) ηpv, (c) ηel, (d) η, (e) ηII-th, and (f) ηII versus channel depth at different mass flow rates

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Fig. 7

FP versus channel depth at different mass flow rates

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