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Experimental Investigation on the Thermal Performance of Pulsating Heat Pipe Heat Exchangers

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Listed:
  • Kai-Shing Yang

    (Department of Refrigeration, Air Conditioning and Energy Engineering, National Chin-Yi University of Technology, Taichung 41170, Taiwan)

  • Ming-Yean Jiang

    (Department of Mechanical Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 80778, Taiwan)

  • Chih-Yung Tseng

    (Green Energy and Environment Research Laboratories, Industrial Technology Research Institute, Hsinchu 31040, Taiwan)

  • Shih-Kuo Wu

    (Green Energy and Environment Research Laboratories, Industrial Technology Research Institute, Hsinchu 31040, Taiwan)

  • Jin-Cherng Shyu

    (Department of Mechanical Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 80778, Taiwan)

Abstract

In this study, the vertically-oriented pulsating heat pipe (PHP) heat exchangers charged with either water or HFE-7000 in a filling ratio of 35% or 50% were fabricated to exchange the thermal energy between two air streams in a parallel-flow arrangement. Both the effectiveness of the heat exchangers and the thermal resistance of PHP with a size of 132 × 44 × 200 mm, at a specific evaporator temperature ranging from 55 to 100 °C and a specific airflow velocity ranging from 0.5 to 2.0 m/s were estimated. The results show that the heat pipe charged with HFE-7000 in either filling ratio is likely to function as an interconnected array of thermosiphon under all tested conditions because of the unfavorable tube inner diameter, whereas the water-charged PHP possibly creates the pulsating movement of the liquid and vapor slugs once the evaporator temperature is high enough, especially in a filling ratio of 50%. The degradation in the thermal performance of the HFE-7000-charged PHP heat exchanger resulted from the non-condensable gas in the tube became diminished as the evaporator temperature was increased. By examining the effectiveness of the present heat exchangers, it is suggested that water is a suitable working fluid while employing the PHP heat exchanger at an evaporator temperature higher than 70 °C. On the other hand, HFE-7000 is applicable to the PHP used at an evaporator temperature lower than 70 °C.

Suggested Citation

  • Kai-Shing Yang & Ming-Yean Jiang & Chih-Yung Tseng & Shih-Kuo Wu & Jin-Cherng Shyu, 2020. "Experimental Investigation on the Thermal Performance of Pulsating Heat Pipe Heat Exchangers," Energies, MDPI, vol. 13(1), pages 1-15, January.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:1:p:269-:d:305487
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    References listed on IDEAS

    as
    1. Kai-Shing Yang & Jian-Sin Wang & Shih-Kuo Wu & Chih-Yung Tseng & Jin-Cherng Shyu, 2017. "Performance Evaluation of a Desiccant Dehumidifier with a Heat Recovery Unit," Energies, MDPI, vol. 10(12), pages 1-12, December.
    2. Lian Zhang & Yu Feng Zhang, 2016. "Research on Heat Recovery Technology for Reducing the Energy Consumption of Dedicated Ventilation Systems: An Application to the Operating Model of a Laboratory," Energies, MDPI, vol. 9(1), pages 1-20, January.
    3. Chih-Yung Tseng & Ho-Meng Wu & Shwin-Chung Wong & Kai-Shing Yang & Chi-Chuan Wang, 2018. "A Novel Thermal Module with 3-D Configuration Pulsating Heat Pipe for High-Flux Applications," Energies, MDPI, vol. 11(12), pages 1-12, December.
    4. Lian Zhang & Yu-Feng Zhang, 2014. "Research on Energy Saving Potential for Dedicated Ventilation Systems Based on Heat Recovery Technology," Energies, MDPI, vol. 7(7), pages 1-20, July.
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    1. Grzegorz Górecki & Marcin Łęcki & Artur Norbert Gutkowski & Dariusz Andrzejewski & Bartosz Warwas & Michał Kowalczyk & Artur Romaniak, 2021. "Experimental and Numerical Study of Heat Pipe Heat Exchanger with Individually Finned Heat Pipes," Energies, MDPI, vol. 14(17), pages 1-26, August.
    2. Luca Cattani & Matteo Malavasi & Fabio Bozzoli & Valerio D’Alessandro & Luca Giammichele, 2023. "Experimental Analysis of an Innovative Electrical Battery Thermal Management System," Energies, MDPI, vol. 16(13), pages 1-17, June.
    3. Pawel Znaczko & Emilian Szczepanski & Kazimierz Kaminski & Norbert Chamier-Gliszczynski & Jacek Kukulski, 2021. "Experimental Diagnosis of the Heat Pipe Solar Collector Malfunction. A Case Study," Energies, MDPI, vol. 14(11), pages 1-19, May.

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