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Experimental Studies of the Influence of Microencapsulated Phase Change Material on Thermal Parameters of a Flat Liquid Solar Collector

Author

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  • Krzysztof Dutkowski

    (Faculty of Mechanical Engineering, Koszalin University of Technology, Raclawicka 15-17 Street, 75-620 Koszalin, Poland)

  • Marcin Kruzel

    (Faculty of Mechanical Engineering, Koszalin University of Technology, Raclawicka 15-17 Street, 75-620 Koszalin, Poland)

  • Tadeusz Bohdal

    (Faculty of Mechanical Engineering, Koszalin University of Technology, Raclawicka 15-17 Street, 75-620 Koszalin, Poland)

Abstract

The article presents the results of preliminary research aimed at determining the possibility of using microencapsulated phase change material (mPCM) slurries as a working fluid in installations with a flat liquid solar collector. In the tests, the following were used as the working fluid: water (reference liquid) and 10% wt. and 20% wt. of an aqueous solution of the product under the trade name MICRONAL ® 5428 X. As the product contained 43% mPCM, the mass fraction of mPCM in the working liquid was 4.3% and 8.6%, respectively. The research was carried out in laboratory conditions in the range of irradiance I = 250–950 W/m 2 . Each of the three working fluids flowed through the collector in the amount of 20 kg/h, 40 kg/h, and 80 kg/h. The working fluid was supplied to the collector with a constant temperature T in = 20 ± 0.5 °C. It was found that the temperature of the working fluid at the collector outlet increases with the increase in the radiation intensity, but the temperature achieved depended on the type of working fluid. The greater the share of mPCM in the working liquid, the lower the temperature of the liquid leaving the solar collector. It was found that the type of working fluid does not influence the achieved thermal power of the collector. The negative influence of mPCM on the operation of the solar collector was not noticed; the positive aspect of using mPCM in the solar installation should be emphasized—the reduced temperature of the medium allows the reduction in heat losses to the environment from the installation, especially in a low-temperature environment.

Suggested Citation

  • Krzysztof Dutkowski & Marcin Kruzel & Tadeusz Bohdal, 2021. "Experimental Studies of the Influence of Microencapsulated Phase Change Material on Thermal Parameters of a Flat Liquid Solar Collector," Energies, MDPI, vol. 14(16), pages 1-15, August.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:16:p:5135-:d:617912
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    References listed on IDEAS

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    1. Ran, Fengming & Chen, Yunkang & Cong, Rongshuai & Fang, Guiyin, 2020. "Flow and heat transfer characteristics of microencapsulated phase change slurry in thermal energy systems: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 134(C).
    2. Liangliang Sun & Nan Xiang & Yanping Yuan & Xiaoling Cao, 2019. "Experimental Investigation on Performance Comparison of Solar Water Heating-Phase Change Material System and Solar Water Heating System," Energies, MDPI, vol. 12(12), pages 1-16, June.
    3. Krzysztof Dutkowski & Marcin Kruzel & Bartosz Zajączkowski, 2020. "Determining the Heat of Fusion and Specific Heat of Microencapsulated Phase Change Material Slurry by Thermal Delay Method," Energies, MDPI, vol. 14(1), pages 1-14, December.
    4. Wang, Zhangyuan & Qiu, Feng & Yang, Wansheng & Zhao, Xudong, 2015. "Applications of solar water heating system with phase change material," Renewable and Sustainable Energy Reviews, Elsevier, vol. 52(C), pages 645-652.
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    8. Wenbo Fang & Saffa Riffat & Yupeng Wu, 2017. "Experimental investigation of evacuated heat pipe solar collector efficiency using phase-change fluid," International Journal of Low-Carbon Technologies, Oxford University Press, vol. 12(4), pages 392-399.
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    Cited by:

    1. Krzysztof Dutkowski & Marcin Kruzel & Jacek Fiuk & Krzysztof Rokosz & Iwona Michalska-Pożoga & Marcin Szczepanek, 2023. "Experimental Studies on the Influence of Spatial Orientation of a Passive Air Solar Collector on Its Efficiency," Energies, MDPI, vol. 16(10), pages 1-13, May.
    2. Marcin Kruzel & Tadeusz Bohdal & Krzysztof Dutkowski & Mykola Radchenko, 2022. "The Effect of Microencapsulated PCM Slurry Coolant on the Efficiency of a Shell and Tube Heat Exchanger," Energies, MDPI, vol. 15(14), pages 1-11, July.

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