Maurice Tutor

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Category > Management Posted 09 Feb 2018 My Price 5.00

tube wall temperature

Water enters a tube at 27°C with a flow rate of 450 kg/h. The heat transfer from the tube wall to the fluid is given as q’s(W/m) ax, where the coefficient a is 20 W/m2 and x (m) is the axial distance from the tube entrance.

 

(a) Beginning with a properly defined differential control volume in the tube, derive an expression for the temperature distribution Tm(x) of the water.

 

(b) What is the outlet temperature of the water for a heated section 30 m long?

 

(c) Sketch the mean fluid temperature, Tm(x), and the tube wall temperature, Ts(x), as a function of distance along the tube for fully developed and developing flow conditions.

 

(d) What value of a uniform wall heat flux, q”s (instead of q’s = ax), would provide the same fluid outlet temperature as that determined in part (b)? For this type of heating, sketch the temperature distributions requested in part (c).

 

 

 

 


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Maurice Tutor
(5)
Status NEW Posted 09 Feb 2018 10:02 PM My Price 5.00

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