Research Papers

Evaluation on the Performance of Photovoltaic–Thermal Hybrid System Using CO2 as a Working Fluid

[+] Author and Article Information
Chayadit Pumaneratkul

Energy Conversion Research Center,
Department of Mechanical Engineering,
Doshisha University,
Tatara, Kyotanabe-shi,
Kyoto Prefecture 610-0321, Japan
e-mail: eup3502@mail4.doshisha.ac.jp

Haruhiko Yamasaki

Energy Conversion Research Center,
Department of Mechanical Engineering,
Doshisha University,
Tatara, Kyotanabe-shi,
Kyoto Prefecture 610-0321, Japan
e-mail: hyamasak@mail.doshisha.ac.jp

Hiroshi Yamaguchi

Energy Conversion Research Center,
Department of Mechanical Engineering,
Doshisha University,
Tatara, Kyotanabe-shi,
Kyoto Prefecture 610-0321, Japan
e-mail: hyamaguc@mail.doshisha.ac.jp

Yuhiro Iwamoto

Department of Electrical and Mechanical
Nagoya Institute of Technology,
Gokiso-cho, Showa-ku, Nagoya-shi,
Aichi Prefecture 466-8555, Japan
e-mail: iwamoto.yuhiro@nitech.ac.jp

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 July 26, 2017; final manuscript received March 5, 2018; published online April 9, 2018. Assoc. Editor: Geoffrey T. Klise.

J. Sol. Energy Eng 140(4), 041011 (Apr 09, 2018) (7 pages) Paper No: SOL-17-1311; doi: 10.1115/1.4039657 History: Received July 26, 2017; Revised March 05, 2018

In this study, the CO2-based photovoltaic–thermal hybrid system has been investigated with an objective to increase the power generation efficiency in photovoltaic solar panel and to improve the performance of supercritical CO2 solar Rankine cycle system (SRCS). From a previous study, an improvement of 2% of power generation efficiency was confirmed via experimental investigation. In this study, the temperature distribution on the CO2-based photovoltaic–thermal hybrid system has been numerically and experimentally investigated and confirmed with referenced experimental results. Particularly, in this study, the one-dimensional (1D) calculation of CO2 flow in the cooling tube and three-dimensional (3D) calculation of temperature distribution on the surface of the photovoltaic solar panel are conducted. The typical summer and winter weather conditions are used as the calculation references to investigate the effect of temperature distribution of the photovoltaic solar panel. The results show that the trend of temperature distribution from calculation was confirmed with the experimental data both in summer and winter conditions. Furthermore, in summer condition, the CO2 temperature was increased to a maximum of 28 °C.

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Fig. 1

Schematic of total system

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Fig. 2

Detailed view of CO2-based photovoltaic–thermal hybrid system and sections

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Fig. 3

Schematic of experimental apparatus

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Fig. 4

Numerical domain of temperature distribution: (a) panel surface and (b) flow passage model of cooling tube

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Fig. 5

3D calculation domain: (a) plate surface and (b) cooling tube arrangement

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Fig. 6

Calculation results of temperature in the cooling tube in winter and summer weather conditions

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Fig. 7

CO2 temperature at the inlet and outlet points of CO2-based photovoltaic–thermal hybrid system in winter and summer weather conditions

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Fig. 8

Experimental results of temperature distribution in (a) winter and (b) summer

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Fig. 9

Analytical results of temperature distribution of photovoltaic solar panel surface in (a) winter and (b) summer




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