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Experimental Performance of a Thermoelectric Heat-Pump Drying System for Drying Herbs

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Abstract

In this study we investigated thermoelectric (TE) heat-pump drying of laurel clock vine leaves, and the effect of drying-air temperature on the characteristics of the leaves. The TE drying system comprised four TE modules each with its own rectangular fin heat sink. The hot side of each TE module was fixed to its own heat sink; the cold sides were fixed to heat-pipe heat sinks and a drying chamber. The drying time depended on drying-air temperature. The heating capacity and coefficient of performance (COP) increased as the current supplied to the TE modules was increased. Calculated COP for the entire TE heat-pump drying system were 1.28 and 0.81 for drying-air temperatures of 50 and 40°C, respectively.

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Acknowledgements

This study was supported by a Research Chair Grant from the National Science and Technology Development Agency (NSTDA), Thailand. Experimental help by Mr Preeda Chairongsri, Mr Suntisuk Phujongkul, and Mr Suwit Lomgsaunjik is highly appreciated.

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Authors and Affiliations

  1. Post-Harvest and Agricultural Machinery Engineering Research Unit, Faculty of Engineering, Mahasarakham University, Khamriang, Kantarawichai, 44150, Mahasarakham, Thailand

    K. Wongsim & J. Jamradloedluk

  2. Energy Technology Division, School of Energy, Environment and Materials, King Mongkut’s University of Technology Thonburi, 126 Pracha Uthit Rd., Bang Mod, Thung Khru, Bangkok, 10140, Thailand

    C. Lertsatitthanakorn & S. Soponronnarit

  3. Research Unit of Process and Product Development of Functional Foods, Department of Food Technology and Nutrition, Faculty of Technology, Mahasarakham University, Khamriang, Kantarawichai, 44150, Mahasarakham, Thailand

    S. Siriamornpun

  4. Mechanical Engineering Department, Faculty of Engineering, Burapha University, 169 Long-Hard Bangsaen Road, Saensuk, Muang, 20131, Chonburi, Thailand

    M. Rungsiyopas

Authors
  1. K. Wongsim
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  2. J. Jamradloedluk
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  3. C. Lertsatitthanakorn
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  4. S. Siriamornpun
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  5. M. Rungsiyopas
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  6. S. Soponronnarit
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Correspondence to C. Lertsatitthanakorn.

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Wongsim, K., Jamradloedluk, J., Lertsatitthanakorn, C. et al. Experimental Performance of a Thermoelectric Heat-Pump Drying System for Drying Herbs. J. Electron. Mater. 44, 2142–2145 (2015). https://doi.org/10.1007/s11664-015-3709-5

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  • DOI: https://doi.org/10.1007/s11664-015-3709-5

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