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The Effect of Microencapsulated PCM Slurry Coolant on the Efficiency of a Shell and Tube Heat Exchanger

Author

Listed:
  • Marcin Kruzel

    (Department of Power Engineering, Faculty of Mechanical Engineering, Koszalin University of Technology, Sniadeckich Street 2, 75-453 Koszalin, Poland)

  • Tadeusz Bohdal

    (Department of Power Engineering, Faculty of Mechanical Engineering, Koszalin University of Technology, Sniadeckich Street 2, 75-453 Koszalin, Poland)

  • Krzysztof Dutkowski

    (Department of Power Engineering, Faculty of Mechanical Engineering, Koszalin University of Technology, Sniadeckich Street 2, 75-453 Koszalin, Poland)

  • Mykola Radchenko

    (Department of Conditioning and Refrigerating, Admiral Makarov National University of Shipbuilding, Heroes of Ukraine Avenue 9, 54025 Mykolayiv, Ukraine)

Abstract

This paper describes the results of experimental studies on heat transfer in a shell and tube heat exchanger during the phase changes of the HFE 7000 refrigerant. The studies were performed using a mixture of water and a microencapsulated phase change material as a coolant. HFE 7000 refrigerant condenses on the external surface of the copper tube, while a mixture of water and phase change materials flows through the channels as coolant. Currently, there is a lack of research describing cooling using phase change materials in heat exchangers. There are a number of publications describing the heat exchange in heat exchangers during phase changes under air or water cooling. Therefore, the research hypothesis was adopted that the use of mixed water and microencapsulated material as a heat transfer fluid would increase the heat capacity and contribute to the enhancement of the heat exchange in the heat exchanger. This will enable an increase in the total heat transfer coefficient and the heat efficiency of the exchanger. Experimental studies describe the process of heat transfer intensification in the above conditions by using the phase transformation of the cooling medium melting. The test results were compared with the results of an experiment in which pure water was used as the reference liquid. The research was carried out in a wide range of refrigerant and coolant parameters: ṁ r = 0.0014–0.0015 kg·s −1 , ṁ c = 0.014–0.016 kg·s −1 , refrigerant saturation temperature Ts = 55–60 °C, coolant temperature at the inlet Tc in = 20–32 °C, and heat flux density q = 7000–7450 W·m −1 . The obtained results confirmed the research hypothesis. There was an average of a 13% increase in the coolant heat transfer coefficient, and the peak increase in αc was over 24%. The average value of the heat transfer coefficient k increased by 5%, and the highest increases in the value of k were noted at T in = 27 °C and amounted to 9% in relation to the reference liquid.

Suggested Citation

  • 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.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:14:p:5142-:d:863584
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    References listed on IDEAS

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    1. Zeng, Ruolang & Wang, Xin & Chen, Binjiao & Zhang, Yinping & Niu, Jianlei & Wang, Xichun & Di, Hongfa, 2009. "Heat transfer characteristics of microencapsulated phase change material slurry in laminar flow under constant heat flux," Applied Energy, Elsevier, vol. 86(12), pages 2661-2670, December.
    2. 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).
    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. 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.
    5. Yang, Liu & Liu, Shuli & Zheng, Hongfei, 2019. "A comprehensive review of hydrodynamic mechanisms and heat transfer characteristics for microencapsulated phase change slurry (MPCS) in circular tube," Renewable and Sustainable Energy Reviews, Elsevier, vol. 114(C), pages 1-1.
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    Cited by:

    1. Andrii Radchenko & Mykola Radchenko & Hanna Koshlak & Roman Radchenko & Serhiy Forduy, 2022. "Enhancing the Efficiency of Integrated Energy Systems by the Redistribution of Heat Based on Monitoring Data," Energies, MDPI, vol. 15(22), pages 1-18, November.
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    4. Mykola Radchenko & Andrii Radchenko & Eugeniy Trushliakov & Hanna Koshlak & Roman Radchenko, 2023. "Advanced Method of Variable Refrigerant Flow (VRF) Systems Designing to Forecast Onsite Operation—Part 2: Phenomenological Simulation to Recoup Refrigeration Energy," Energies, MDPI, vol. 16(4), pages 1-17, February.
    5. Zongming Yang & Volodymyr Korobko & Mykola Radchenko & Roman Radchenko, 2022. "Improving Thermoacoustic Low-Temperature Heat Recovery Systems," Sustainability, MDPI, vol. 14(19), pages 1-16, September.
    6. Mykola Radchenko & Andrii Radchenko & Eugeniy Trushliakov & Anatoliy Pavlenko & Roman Radchenko, 2023. "Advanced Method of Variable Refrigerant Flow (VRF) System Design to Forecast on Site Operation—Part 3: Optimal Solutions to Minimize Sizes," Energies, MDPI, vol. 16(5), pages 1-18, March.

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