Energy Transfers by Convection by Benallou Abdelhanine;

Author:Benallou, Abdelhanine; [Benallou, Abdelhanine]
Language: eng
Format: epub
Publisher: John Wiley & Sons, Incorporated
Published: 2019-01-07T00:00:00+00:00

We thus take v* = 63.766 m/s; corresponding to a flow rate, F = 2.02 m3/sec.

b) Calculation from the analytical expression:

where and α = 1.62 × 10-6 m2 s-1, hence: v* = 63.766 m/s.

6) Calculating the limit value of the flux transferred

The flux boundary value is obtained when θs = θs* and F = πri2v*.

Hence: .

NUMERICAL APPLICATION.–

ri =3.18 × 10-3 m

v* = 63.766 m/s

ρ = 860 kg/m3

Cp = 100.5 J/kg°C

θe = 25°C

θs* = 111°C

ϕ= 15,014 W

EXERCISE 14. Heating a vegetable oil in a rectangular pipe

To heat a vegetable oil, we pass it through the rectangular pipe represented in the figure below.

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