Determination of Heat Transfer Cooling Rates in an Mixing Vessel Using Kanthal Heating Element
|International Journal of Engineering Trends and Technology (IJETT)||
|© 2012 by IJETT Journal|
|Year of Publication : 2012|
|Authors : Ashok Reddy K ,Bhagvanth Rao M , Ram Reddy P|
Ashok Reddy K ,Bhagvanth Rao M , Ram Reddy P. " Determination of Heat Transfer Cooling Rates in an Mixing Vessel Using Kanthal Heating Element". International Journal of Engineering Trends and Technology (IJETT). V3(2):193-200 Mar-Apr 2012. ISSN:2231-5381. www.ijettjournal.org. published by seventh sense research group
A mathematical model is developed to analyze the heating rates and compare the relation with experimental results obtained in our present study . Low shear rate concentration of sodium carboxymethal cellulose fluids with two different coil lengths 2.362m and 2.82m, diameter of the helical coil equal to 156mm, d i =4.0mm and d o =6.4mm were used to correlate overall heat transfer coefficients in an agitated vessel with four blade paddle impeller. The model is derived by using velocity flow field and energy equations in cylindrical coordinate for straight tube and later extended to helical coil. The new design relation for obtaining the individual heat transfer coefficient in terms of flow behavior index is equal to Nu=[(280n 3 + 296n 2 + 88n +8)/(31n 3 + 43n 2 + 13n +1)].
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