Investigating the kinetics at low temperature heat pump drying and conventional drying of osmotic dehydrated blueberries

The possibilities for low-temperature heat pump and conventional drying of blueberries during preliminary osmotic dehydration was studied. A full factor experiment of type 22+3 was performed. The kinetics of the process during variation of the main mode parameters: inlet temperature and thickness of...

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Bibliographic Details
Main Authors: Hristo Hristov, Svetoslav Aleksandrov, Todorka Petrova, Milena Ruskova, Velitchka Gotcheva, Penov Nikolay
Format: article
Language:EN
FR
Published: EDP Sciences 2021
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Online Access:https://doaj.org/article/db4890d0e9524221b5bf36f53b6b467a
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Summary:The possibilities for low-temperature heat pump and conventional drying of blueberries during preliminary osmotic dehydration was studied. A full factor experiment of type 22+3 was performed. The kinetics of the process during variation of the main mode parameters: inlet temperature and thickness of the drying layer (load on the scaffolding) was studied. The curves of the drying process U = f (τ) and the curves of the drying speed dU / dτ = f (U) were constructed. The influence of the regime parameters on the drying time was established. Regression models of the drying coefficient during the second period of drying were presented.