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Environment-Controlled Thin-Layer-Drying Of Cut-Roselle: Drying-Experiments, Effects Of Drying-Settings, Drying-Models

Author

Listed:
  • I.E. Saeed

    (Department of Mech. & Manufacturing Eng., Faculty of Eng. & Built Environ., National University of Malaysia, 43600 Bangi)

  • Zulkhairi Zainol Abidin

    (Department of Mech. & Manufacturing Eng., Faculty of Eng. & Built Environ., National University of Malaysia, 43600 Bangi)

Abstract

This research investigated how the drying-conditions affect drying-performance of Cut-Roselle (Hibiscus_sabdariffa L.). The experiments are conducted using Constant-Temperature-Humidity-Chamber, where varied temperatures (35,45,55,65°C) and relative humidity levels (30,35,40,45,50%) are tested. The drying process for Cut-Roselle primarily occurred during the falling-rate-period. Notably, the drying-air temperature significantly, influenced the drying-kinetics, with higher temperatures (ranging from 35 to 65°C) resulted in shorter drying-times. Relative-humidity had a lesser-impact compared to the temperature. Extended drying-periods and increased equilibrium moisture levels are observed under conditions of elevated relative-humidity and reduced temperatures. An evaluation of various thin-layer drying-models is conducted to determine the most accurate model for the drying-characteristics. The Modified-Page II model demonstrated exceptional fit quality, with R2=0.99949. It effectively described the dehydration-behavior of Cut-Roselle within the range of the experimental drying-parameters.

Suggested Citation

  • I.E. Saeed & Zulkhairi Zainol Abidin, 2024. "Environment-Controlled Thin-Layer-Drying Of Cut-Roselle: Drying-Experiments, Effects Of Drying-Settings, Drying-Models," Acta Mechanica Malaysia (AMM), Zibeline International Publishing, vol. 7(1), pages 49-59, July.
    • Handle: RePEc:zib:zbnamm:v:7:y:2024:i:1:p:49-59
    DOI: 10.26480/amm.01.2024.49.59
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    References listed on IDEAS

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    1. Atalay, Halil, 2019. "Performance analysis of a solar dryer integrated with the packed bed thermal energy storage (TES) system," Energy, Elsevier, vol. 172(C), pages 1037-1052.
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