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Open AccessArticle

Mathematical Modeling and Performance Analysis of a New Hybrid Solar Dryer of Lemon Slices for Controlling Drying Temperature

1
School of Energy and Power Engineering, Shandong University, Jinan 250061, China
2
Suzhou Institute, Shandong University, Suzhou 215028, China
*
Author to whom correspondence should be addressed.
Energies 2020, 13(2), 350; https://doi.org/10.3390/en13020350
Received: 9 December 2019 / Revised: 3 January 2020 / Accepted: 9 January 2020 / Published: 10 January 2020
(This article belongs to the Section Sustainable Energy)
A new hybrid solar dryer was designed and constructed in this study, which consisted of a flat-plate solar collector with dual-function (DF-FPSC), drying chamber with glass, fan etc. The DF-FPSC was firstly applied in drying agricultural products. The innovative application of hybrid solar dryer can control the drying chamber air temperature within a suitable range by different operation strategies. Drying experiments for lemon slices in the hybrid solar dryer were conducted by comparing open sun drying (OSD). Eight mathematical models of drying characteristics were employed to select the most suitable model for describing the drying curves of lemon slices. Furthermore, energy, exergy economic and environment (4E) analysis were also adopted to analyze the drying process of lemon slices. The results show that under the same experimental condition, the drying capability of the hybrid solar dryer was stronger than that of OSD. Meanwhile, it was found that the Two term and Wang and Singh models were the most suitable for fitting the lemon slices’ drying characteristics inside the hybrid solar dryer. The drying chamber air temperature can be controlled under about 60 °C during the process of lemon slices’ drying. The experimental results show the feasibility and validity of the proposed hybrid solar dryer. View Full-Text
Keywords: mathematical modeling; hybrid solar dryer; solar collector; lemon slices; performance analysis mathematical modeling; hybrid solar dryer; solar collector; lemon slices; performance analysis
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MDPI and ACS Style

Hao, W.; Liu, S.; Mi, B.; Lai, Y. Mathematical Modeling and Performance Analysis of a New Hybrid Solar Dryer of Lemon Slices for Controlling Drying Temperature. Energies 2020, 13, 350.

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