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KMID : 1007520230320070969
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Food Science and Biotechnology
2023 Volume.32 No. 7 p.969 ~ p.977
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Drying performance and energy consumption of Camellia oleifera seeds under microwave-vacuum drying
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Dongyan Zhang
Dan Huang
Xiyang Zhang
Hangyi Zhao
Guiliang Gong
Xiaohong Tang
Lijun Li
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Abstract
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Microwave-vacuum drying performance and energy consumption of Camellia oleifera seeds were studied in this paper. The effects of microwave power, vacuum pressure and loading quantity were evaluated and discussed. Orthogonal experiments were also conducted to optimize the drying process. A new drying model based on the weibull distribution model was developed. Results showed that the microwave-vacuum drying process was dominated by internal water diffusion and surface water evaporation. As the microwave power and vacuum pressure increased and the loading quantity decreased, the drying time and energy consumption both decreased. However, too low or too high microwave power would increase the energy consumption. The optimal microwave-vacuum drying conditions were found to be a loading quantity of 150 g, a microwave power of 350 W and a vacuum pressure of 0.09 MPa. The developed drying model and the calculated scale and shape parameter were all consistent with experimental results.
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KEYWORD
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Drying performance, Energy consumption, Camellia oleifera seeds, Microwave-vacuum drying, Drying model
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