Optimization of a variable-temperature heat pump drying process of shiitake mushrooms using response surface methodology

L.Z. Zhang, L. Jiang, Z.C. Xu, X.J. Zhang, Y.B. Fan, M. Adnouni and C.B. Zhang

Renewable Energy, 2022, vol. 198, issue C, 1267-1278

Abstract: Quality, energy consumption, and production efficiency are paramount factors for optimizing a shiitake mushroom drying process, which are often mutually restrained. This paper adopts the response surface methodology to optimize a variable-temperature drying process of shiitake mushrooms based on a comprehensive score considering the above three aspects. A mode-switchable heat pump drying system is specially built to implement a variable-temperature drying process including four stages in which drying temperatures are 35 °C, 45 °C, 55 °C, and 65 °C, respectively. It is demonstrated that the drying time at 55 °C is the most important factor affecting the rehydration ratio of dried shiitake mushrooms, and the drying time at 35 °C is the key factor affecting the coefficient of performance of the heat pump. Moreover, according to the comprehensive score, the optimal drying time at 35 °C, 45 °C, 55 °C, and 65 °C are 2.4 h, 3.3 h, 5.6 h, and 2.6 h, respectively. The comprehensive score of the optimal drying process is 0.837 which is 49% higher than that of constant-temperature drying at 65 °C. One striking fact is that a valuable theoretical and experimental guideline is provided for future research on heat pump drying of shiitake mushrooms.

Keywords: Shiitake mushroom; Variable-temperature drying; Heat pump; Response surface methodology (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (6)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:198:y:2022:i:c:p:1267-1278

DOI: 10.1016/j.renene.2022.08.094

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