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MARCH 2011 (published: 01.03.2011)
Number 1(11)
Home > Issue > Improving of the efficiency of heat transfer in the drying process of phospholipid emulsion of sunflower oil in the rotary-film apparatus
Altaiuly S.
The article deals with improving of the efficiency of heat transfer in the drying process of phospholipid emulsion of sunflower oil in the rotary-film apparatus. Presented by the analysis of heat transfer in a rotary-film apparatus with rigid rotor blades. Heat transfer depends largely on hydrodynamic characteristics of the design rotor blades (dp), the angular velocity of the rotor blades ω, the specific heat flux q, the linear density of irrigation Г and thermal properties of liquids. It is determined that the increase in the rate of rotation of the rotor blades of the rotary-film apparatus leads to an increase in the intensity of heat transfer and evaporation of moisture from the film of the product only to a certain limit. This is caused on the one hand by increasing of the viscosity, leading to an increasing in film thickness and improving its thermal resistance, and on the other hand an increasing in hydrodynamic resistance of the resulting vapor layer above the surface of the film and prevents the vapor phase moisture from both the film and from the heating zone product.
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Keywords: heat transfer, the drying process, phospholipid emulsions, rotary-film apparatus
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
UDC 665.37: 66. 047.2
Improving of the efficiency of heat transfer in the drying process of phospholipid emulsion of sunflower oil in the rotary-film apparatus
The article deals with improving of the efficiency of heat transfer in the drying process of phospholipid emulsion of sunflower oil in the rotary-film apparatus. Presented by the analysis of heat transfer in a rotary-film apparatus with rigid rotor blades. Heat transfer depends largely on hydrodynamic characteristics of the design rotor blades (dp), the angular velocity of the rotor blades ω, the specific heat flux q, the linear density of irrigation Г and thermal properties of liquids. It is determined that the increase in the rate of rotation of the rotor blades of the rotary-film apparatus leads to an increase in the intensity of heat transfer and evaporation of moisture from the film of the product only to a certain limit. This is caused on the one hand by increasing of the viscosity, leading to an increasing in film thickness and improving its thermal resistance, and on the other hand an increasing in hydrodynamic resistance of the resulting vapor layer above the surface of the film and prevents the vapor phase moisture from both the film and from the heating zone product.
Read the full article
Keywords: heat transfer, the drying process, phospholipid emulsions, rotary-film apparatus
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License