| Summary: | 碩士 === 淡江大學 === 機械工程學系 === 87 === The purpose of this thesis is to find the relation among control parameters within the furnace for heating sesame, and to study the influence of control parameters on the temperature field and heat transfer.
The experimental result is to use the line heat source method and the apparatus-Thermolink to measure the sesame conductivity. The conductivity of sesame within tempertaure range from 20℃~40℃ is
K=0.065+0.0037T
In addition, applying the model of furnace simulation and dynamic similarity theory to predict the relationship among control parameters within the prototype is
Fp=10.5922+1.3573Gsp-0.0198(Gsp^2)
-5.48NpRpLp^(-1/2)+0.5[(NpRp)^2]/Lp
Where Fp is the fill rate of sesame, Gsp is the feed rate of sesame, Rp is the radius, Np is the rotation speed, and Lp is the length of the prototype of furnace.
The numerical analysis is to use the finite element analysis software-ANSYS to study the influence of control parameters on the temperature field. The larger the length of the furnace can increase the maximum temperature and the average temperature. The larger the radius of the furnace also can increase the maximum temperature and the average temperature, but can decrease the minimum temperature then make the larger range of highest and lowest temperatures. The larger the fill rate of sesame can decrease the maximum temperature, but makes a little increase on the average temperature. The larger the rotation angle can decrease the maximum temperature、minimum temperature and average temperature, and have larger descending rangeability. The radial temperature gradients among bed、wall and air of the furnace will decrease, and reduces the gradients of temperature in the furnace, while the rotation angle increases.
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