| Issue |
E3S Web Conf.
Volume 327, 2021
26th Scientific Conference on Power Engineering and Power Machines (PEPM’2021)
|
|
|---|---|---|
| Article Number | 01015 | |
| Number of page(s) | 6 | |
| Section | Thermal Equipment, Heat and Mass Transfer Processes | |
| DOI | https://doi.org/10.1051/e3sconf/202132701015 | |
| Published online | 22 November 2021 | |
Investigating the kinetics at low temperature heat pump drying and conventional drying of osmotic dehydrated blueberries
1 Department of Machines and apparatuses for food industry1, University of food technologies, Plovdiv, Bulgaria
2 Institute of food preservation and quality, Plovdiv, Bulgaria
3 Department of Biotechnology, University of food technologies, Plovdiv, Bulgaria
4 Department of Food preservation and refrigeration technology, University of food technologies, Plovdiv, Bulgaria
* corresponding author: h_geo@mail.bg
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.
© The Authors, published by EDP Sciences, 2021
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