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     Research Journal of Applied Sciences, Engineering and Technology


The Multi-objective Optimization by the Restricted Area Method to Determine the Technological Mode of Cold Drying Process of Carrot Product

1Vu Duc Phuong and 2Nguyen Tan Dzung
1Faculty of Heat-Refrigeration Engineering, Industrial University of HCM City, No. 12-Nguyen Van Bao Street, 4 Ward, Go Vap District
2Department of Food Technology, Faculty of Chemical and Food Technology, HCMC University of Technology and Education, No. 01-Vo Van Ngan Street, Thu Duc District, HCM City, Viet Nam
Research Journal of Applied Sciences, Engineering and Technology  2016  1:64-74
http://dx.doi.org/10.19026/rjaset.13.2891  |  © The Author(s) 2016
Received: December ‎30, ‎2015  |  Accepted: April ‎22, ‎2016  |  Published: July 05, 2016

Abstract

Finding the technological mode of cold drying process of carrot product was the major aim of this study. The experiments were carried out according to experimental plannings. Results obtained were to build the multi-objective optimization problem to describe relationships between objective functions with technological factors (temperature of moisture condensation, temperature of cold drying chamber, velocity air (or drying agents) and time of cold drying) of cold drying process of carrot product. By the Restricted Area Method (RAM), solving the multi-objective optimization problem was found out the technological mode of the cold drying process of carrot product as follows: temperature of moisture condensation was $Z_1^{opt} = 15.62°C$, temperature of cold drying chamber was $Z_2^{opt} = 35.79°C$, velocity air (or drying agents) was $Z_3^{opt} = 11.74m/s$ and the time of cold drying process was $Z_4^{opt} = 16.05h$. Corresponding to these optimal factors, the objective functions reached the minimum value in terms of the final product, including the energy consumption of $y_{1P}^R = 1.62kWh/kg$, the residual water content of $y_{2P}^R = 4.52%$, the anti-rehydration capacity of $y_{3P}^R = 6.43%$ (Correspondingly IR = 93.57%) and the loss of total β-caroten inside carrotof $y_{4P}^R =4.45%$.

Keywords:

Carrot cold drying, dried carrot, multi-objective optimization problem for cold drying process of carrot, optimization the cold drying process , optimization the cold drying process of carrot,


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Competing interests

The authors have no competing interests.

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This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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ISSN (Online):  2040-7467
ISSN (Print):   2040-7459
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