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Energy – exergy analysis and mathematical modeling of cassava starch drying using a hybrid solar dryer

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Department of Chemical Engineering, Faculty of Engineering, Jl. Prof.Soedarto, SH-Tembalang,, Diponegoro University, Semarang, 50271, Indonesia

School of Postgraduate Studies, Jl. Imam Bardjo, SH-Tembalang,, Diponegoro University, Semarang, 50241, Indonesia

Abstract

In this study, we aimed to energetically and exergetically evaluate the usage of a hybrid solar dryer system for cassava drying via a series of drying experiments. The experiments were performed beginning at . A.M. (hereafter, in local time) until the moisture content of cassava starch became constant at a value less than % on a wet basis at drying temperatures of °C to °C and drying times of – min. The results demonstrated that the highest overall dryer energetic efficiency was . %, which was achieved at a drying temperature at °C, and that the maximum energetic efficiency of % was recorded at . A.M. The exergy flows fluctuated during the drying process and were dependent on the solar radiation and drying conditions; however, the exergetic efficiency of the dryer was . %–

. %. Comparison of the fitting models denoted that the Page model was the most suitable model for describing the experimental drying performances. The calculated effective diffusivity constant (D ) and the activation energy (E ) during the drying process from °C to °C were ·× m /s and . kJ/mole, respectively. © , © The Author(s). This open access article is distributed under a Creative Commons Attribution (CC-BY) . license.

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cassava starch energy exergy hybrid solar dryer mathematical modeling

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This work was supported by research grants provided by the Ministry of Research, Technology, and Higher Education of Indonesia for funding this research.

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Open Access Cogent Engineering

Volume 7, Issue 1, 1 January 2020, Article number 1771819

Suherman, S.â  Susanto, E.E.â  Zardani, A.W.â  Dewi, N.H.R.â  Hadiyanto, H.â,b  

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Thin-Layer Drying | High Temperature Air | Solar Dryers

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ISSN: 23311916 Source Type: Journal Original language: English

DOI: 10.1080/23311916.2020.1771819 Document Type: Article

Publisher: Cogent OA

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knowledge transfer to industry, applying the results of his work to help multinational companies and SMEs to generate wealth and create and safeguard jobs. In 2003 he was awarded an OBE for his services to Engineering.

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