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Performance Evaluation of a Desiccant Dehumidifier with a Heat Recovery Unit

Author

Listed:
  • Kai-Shing Yang

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

  • Jian-Sin Wang

    (Department of Mechanical Engineering, National Kaohsiung University of Applied Sciences, Kaohsiung 80778, Taiwan)

  • Shih-Kuo Wu

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

  • Chih-Yung Tseng

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

  • Jin-Cherng Shyu

    (Department of Mechanical Engineering, National Kaohsiung University of Applied Sciences, Kaohsiung 80778, Taiwan)

Abstract

In order to effectively increase the drying rate and reduce the energy consumption, a dryer which reduces the air humidity at the dryer inlet using desiccant and regenerates the desiccant by recovering waste heat using a heat pipe heat exchanger was developed in this study. Both the adsorption rate and desorption rate of the dryer were measured at several ambient temperatures ranging from 15 °C to 35 °C, relative humidity levels of air ranging from 20% to 85%, and airflow rates ranging from 30 m 3 /h to 150 m 3 /h. The results showed that the adsorption rate in an environment of high relative humidity of air was 4.89 times higher than that of low relative humidity of air at 15 °C. Moreover, the difference in adsorption rate between two given relative humidity of air increased as the ambient temperature decreased. The specific energy consumption estimated with both energy consumption during desorption and the desorption rate indicated that the energy consumption was 8.27 kJ/g H 2 O without using recovered heat, while the energy consumption was 4.77 kJ/g H 2 O using recovered heat at 130 °C.

Suggested Citation

  • 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.
  • Handle: RePEc:gam:jeners:v:10:y:2017:i:12:p:2006-:d:121142
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    References listed on IDEAS

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    Cited by:

    1. Elena Belyanovskaya & Miroslav Rimár & Roman D. Lytovchenko & Miroslav Variny & Kostyantyn M. Sukhyy & Oleksandr O. Yeromin & Mikhailo P. Sykhyy & Elena M. Prokopenko & Irina V. Sukha & Mikhailo V. Gu, 2020. "Performance of an Adsorptive Heat-Moisture Regenerator Based on Silica Gel–Sodium Sulphate," Sustainability, MDPI, vol. 12(14), pages 1-15, July.
    2. 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.
    3. Jingang Yang & Yaohua Zhao & Aoxue Chen & Zhenhua Quan, 2019. "Thermal Performance of a Low-Temperature Heat Exchanger Using a Micro Heat Pipe Array," Energies, MDPI, vol. 12(4), pages 1-16, February.

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