Experimental Estimation of Heat Transfer Coefficients Using Helical Coil in an Agitated Vessel

  ijett-book-cover  International Journal of Engineering Trends and Technology (IJETT)          
  
© 2012 by IJETT Journal
Volume-3 Issue-2                          
Year of Publication : 2012
Authors :  Ashok Reddy K , Bhavanth Rao M ,Ram Reddy P

MLA 

Ashok Reddy K , Bhavanth Rao M ,Ram Reddy P. " Experimental Estimation of Heat Transfer Coefficients Using Helical Coil in an Agitated Vessel". International Journal of Engineering Trends and Technology (IJETT). V3(2):113-122 Mar-Apr 2012. ISSN:2231-5381. www.ijettjournal.org. published by seventh sense research group

Abstract

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 length s 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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Keywords
Helical coil, Heat Transfer Agitated Vessel