Researching building equation of natural convection air flow velocity in 5 x 6 m2 (3,5 tons/batch) tobacco dryer chamber
Main Article Content
Abstract
Researching-building equation of natural convection air flow velocity in 5 X 6 m2
(3,5 tons) tobacco dryer chambers.
One of the factors influencing in the quality of dried tobacco in handicraft tobacco
dryer is velocity of air flow through the layer of leaf tobacco. Based on theory, the
equation is pointed out and based on experiments, coefficients are confirmed. Finally,
the equation is completed so that it is used for the 5 x 6 m2 (3,5 tons) tobacco dryer.
Mass of air entering the dryer chamber influences greatly on escaping humidity
and quality of leaf tobacco. They depend on surface of inlet and outlet, resistance of
tobacco leaves in the tobacco dryer chamber, and the difference of temperature inside
and outside dryer chamber.
Therefore, an equation of velocity of the natural convection air flow through the
leaf tobacco layer is established for designing dryer.
(3,5 tons) tobacco dryer chambers.
One of the factors influencing in the quality of dried tobacco in handicraft tobacco
dryer is velocity of air flow through the layer of leaf tobacco. Based on theory, the
equation is pointed out and based on experiments, coefficients are confirmed. Finally,
the equation is completed so that it is used for the 5 x 6 m2 (3,5 tons) tobacco dryer.
Mass of air entering the dryer chamber influences greatly on escaping humidity
and quality of leaf tobacco. They depend on surface of inlet and outlet, resistance of
tobacco leaves in the tobacco dryer chamber, and the difference of temperature inside
and outside dryer chamber.
Therefore, an equation of velocity of the natural convection air flow through the
leaf tobacco layer is established for designing dryer.
References
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2. Tran Van Phu, Calculating and designing of drying system, Education Publisher, Hanoi, 2001. 300p.
3. Hoang Dinh Tin, Industrial heat, National University HCM City Publisher, HCM 2001, 400p.
4. Hoang Dinh Tin, Basic heat transfer, National University HCM City Publisher, HCM, 2002, 200p.
5. Anthony F.Mills, Basic heat and mass transfer, IRWIN, Chicago - USA , 1995, 700p.
6. B.ph. Drozdop, Ventilating and warming, Publishing House of Moscow University,300p.
7. Nguyen Hay, Experimental research on heat supplying system with two burning chambers for tabacco leaf dryer in South Vietnam, Journal of Agricutural Sciences and Technology, NongLam University, HCM City, Agricultural publisher, N0.4, 2003, pp 106-109.