A paddle agitator is used in a tank of 1.95m diameter with heating coils to heat a liquid which is at 300K. The agitator is 0.59 m in diameter rotating at 100rpm. Hot water is used in the heating coil. The wall surface temperature is a constant at 357.2K. The fluid has the following bulk fluid properties: ρ = 961kg/m3   cp = 250 J/Kg.K           k= 0.173 W/m.K         µ= 1.00 Pa.s at 300 K and 0.084 Pa.s at 357.2 K Calculate the heat transfer coefficient given the following expression with the following dimensionless numbers:    = 0.87NRe0.65 NPr 1/3 (µ/ µw)0.4

Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
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QUESTION 2 (lecture slide 29)

A paddle agitator is used in a tank of 1.95m diameter with heating coils to heat a liquid which is at 300K. The agitator is 0.59 m in diameter rotating at 100rpm. Hot water is used in the heating coil. The wall surface temperature is a constant at 357.2K. The fluid has the following bulk fluid properties:

ρ = 961kg/m3   cp = 250 J/Kg.K           k= 0.173 W/m.K        

µ= 1.00 Pa.s at 300 K and 0.084 Pa.s at 357.2 K

Calculate the heat transfer coefficient given the following expression with the following dimensionless numbers:

 

 = 0.87NRe0.65 NPr 1/3 (µ/ µw)0.4

 

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