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Research Papers

Research on the Performance of Flat-Box Photovoltaic/Thermal Collector With Cooling Channels

[+] Author and Article Information
Zhang Heng

School of Energy, Power and
Mechanical Engineering,
North China Electric Power University,
Beijing 102206, China
e-mail: zhangchongheng@hotmail.com

Liu Haowen

School of Energy, Power and
Mechanical Engineering,
North China Electric Power University,
Beijing 102206, China
e-mail: liu_haowen@hotmail.com

Chen Haiping

School of Energy, Power and
Mechanical Engineering,
North China Electric Power University,
Beijing 102206, China
e-mail: hdchenhaiping@163.com

Guo Xinxin

School of Energy, Power and
Mechanical Engineering,
North China Electric Power University,
Beijing 102206, China
e-mail: 694651307@qq.com

Liang Kai

School of Energy, Power and
Mechanical Engineering,
North China Electric Power University,
Beijing 102206, China
e-mail: 906352487@qq.com

Yao Pengbo

School of Energy, Power and
Mechanical Engineering,
North China Electric Power University,
Beijing 102206, China
e-mail: 455195587@qq.com

1Corresponding authors.

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 24, 2017; final manuscript received November 9, 2017; published online December 22, 2017. Assoc. Editor: M. Keith Sharp.

J. Sol. Energy Eng 140(2), 021002 (Dec 22, 2017) (10 pages) Paper No: SOL-17-1306; doi: 10.1115/1.4038621 History: Received July 24, 2017; Revised November 09, 2017

Photovoltaic/thermal (PV/T) collector is a novel collector which incorporates photovoltaic power generation and low-temperature heat utilization of solar energy. In this paper, a three-dimensional (3D) physical model of flat-box PV/T collector is established in the cfd software. The effects of different tube heights, flow rates, inlet temperature, wind speed, and ambient temperature were tested. By analyzing and comparing the simulated and experimental results, the relative errors of the thermal efficiency between the simulated and experimental values are smaller than those of the electric efficiency. According to the experiment, when the water flow is 210 L/h, the average outlet temperature is 37.598 °C, and the thermal and electric efficiencies are 52.524% and 10.064%, respectively.

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References

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Figures

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Fig. 1

The structure diagram of the PV/T collector and cooling channels

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Fig. 2

Structure diagram of the experimental setup: (a) experimental setup of the flat-box PV/T collector with cooling channels and (b) control interface of the flat-box PV/T collector with cooling channels

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Fig. 3

Schematic figure for heat transfers between different layers

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Fig. 9

Temperature of outlet water and cells with varying inlet temperatures

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Fig. 10

Thermal, electric, and primary energy saving efficiencies of collectors with varying inlet temperatures

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Fig. 4

Gambit model of the PV/T collectors

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Fig. 5

Gird independence analysis

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Fig. 6

The variation in temperature of upper surface and outlet water with tube heights

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Fig. 7

Temperature of outlet water and cells with varying inlet flows

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Fig. 8

Thermal, electrical, and primary energy saving efficiencies of collectors with varying inlet flows

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Fig. 11

Temperature of outlet water and cells with varying wind speeds

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Fig. 12

Thermal, electric, and primary energy saving efficiencies with varying wind speeds

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Fig. 13

Temperature of outlet water and cells with varying ambient temperatures

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Fig. 14

Thermal, electrical, and primary energy saving efficiencies with varying ambient temperatures

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Fig. 15

Comparison of cells' temperature under different inlet flows

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Fig. 16

Comparison of thermal/electrical efficiency under different inlet flows

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