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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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