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Optimization on drying conditions of a solar electrohydrodynamic drying system based on desirability concept.

Dalvand MJ, Mohtasebi SS, Rafiee S - Food Sci Nutr (2014)

Bottom Line: Electrohydrodynamic (EHD) has been applied for drying of agricultural materials due to several advantages such as energy saving, low cost equipment, low drying temperatures, and superior material quality.The results indicated that increasing the applied voltage from 6 to 15 kV, moisture ratio (MR) decreased, though energy efficiency and energy consumption were increasing.On the other hand, field strength of 5.2 kV cm(-1) was the optimal point in terms of MR.

View Article: PubMed Central - PubMed

Affiliation: Department of Agricultural Machinery Engineering, Faculty of Agricultural Engineering and Technology, University of Tehran Karaj, Iran.

ABSTRACT
The purpose of this article was to present a new drying method for agricultural products. Electrohydrodynamic (EHD) has been applied for drying of agricultural materials due to several advantages such as energy saving, low cost equipment, low drying temperatures, and superior material quality. To evaluate this method, an EHD dryer based on solar (photovoltaic) energy was designed and fabricated. Moreover, the optimum condition for the EHD drying of kiwi fruit was studied by applying the Box-Behnken design of response surface methodology. The desirability function was applied for optimization in case of single objective and multiobjective functions. By using the multiobjective optimization method, maximum desirability value of 0.865 was obtained based on the following: applied voltage of 15 kV, field strength of 5.2 kV cm(-1), without forced air stream, and finally a combination of 17 discharge electrodes (needles). The results indicated that increasing the applied voltage from 6 to 15 kV, moisture ratio (MR) decreased, though energy efficiency and energy consumption were increasing. On the other hand, field strength of 5.2 kV cm(-1) was the optimal point in terms of MR.

No MeSH data available.


A three-dimensional response surface plot illustrating optimal conditions for reciprocal of desirability as a function of (A) applied voltage and field strength, and (B) field strength and air velocity.
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fig07: A three-dimensional response surface plot illustrating optimal conditions for reciprocal of desirability as a function of (A) applied voltage and field strength, and (B) field strength and air velocity.

Mentions: MR, energy efficiency, and energy consumption were chosen as responses. Moreover, due to the influence of EHD drying on reducing energy consumption, the value of 2 for the weight of efficiency and energy consumption was considered (Table1). The three-dimensional response surface and the two-dimensional contour plots are the graphical representations of the regression equation. Both plots are presented in Figures7 and 8.


Optimization on drying conditions of a solar electrohydrodynamic drying system based on desirability concept.

Dalvand MJ, Mohtasebi SS, Rafiee S - Food Sci Nutr (2014)

A three-dimensional response surface plot illustrating optimal conditions for reciprocal of desirability as a function of (A) applied voltage and field strength, and (B) field strength and air velocity.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4256582&req=5

fig07: A three-dimensional response surface plot illustrating optimal conditions for reciprocal of desirability as a function of (A) applied voltage and field strength, and (B) field strength and air velocity.
Mentions: MR, energy efficiency, and energy consumption were chosen as responses. Moreover, due to the influence of EHD drying on reducing energy consumption, the value of 2 for the weight of efficiency and energy consumption was considered (Table1). The three-dimensional response surface and the two-dimensional contour plots are the graphical representations of the regression equation. Both plots are presented in Figures7 and 8.

Bottom Line: Electrohydrodynamic (EHD) has been applied for drying of agricultural materials due to several advantages such as energy saving, low cost equipment, low drying temperatures, and superior material quality.The results indicated that increasing the applied voltage from 6 to 15 kV, moisture ratio (MR) decreased, though energy efficiency and energy consumption were increasing.On the other hand, field strength of 5.2 kV cm(-1) was the optimal point in terms of MR.

View Article: PubMed Central - PubMed

Affiliation: Department of Agricultural Machinery Engineering, Faculty of Agricultural Engineering and Technology, University of Tehran Karaj, Iran.

ABSTRACT
The purpose of this article was to present a new drying method for agricultural products. Electrohydrodynamic (EHD) has been applied for drying of agricultural materials due to several advantages such as energy saving, low cost equipment, low drying temperatures, and superior material quality. To evaluate this method, an EHD dryer based on solar (photovoltaic) energy was designed and fabricated. Moreover, the optimum condition for the EHD drying of kiwi fruit was studied by applying the Box-Behnken design of response surface methodology. The desirability function was applied for optimization in case of single objective and multiobjective functions. By using the multiobjective optimization method, maximum desirability value of 0.865 was obtained based on the following: applied voltage of 15 kV, field strength of 5.2 kV cm(-1), without forced air stream, and finally a combination of 17 discharge electrodes (needles). The results indicated that increasing the applied voltage from 6 to 15 kV, moisture ratio (MR) decreased, though energy efficiency and energy consumption were increasing. On the other hand, field strength of 5.2 kV cm(-1) was the optimal point in terms of MR.

No MeSH data available.