The liquid food is heated in a tubular heat exchanger. The inside pipe wall temperature is 110 °C. The internal diameter of the pipe is 50 mm. The product flows at 0.7 kg/s. If the initial temperature of the product is 7 °C, calculate the convective heat transfer coefficient. The thermal properties of the product are as follows: specific heat = 3.7 kJ / (kg °C), thermal conductivity = 0.6 W / (m °C), product viscosity = 500 x 10-6 Pa s, density = 1000 kg / m³ , product viscosity at 110 °C = 410 x 10-6 Pa s. a. Determine Reynolds number = Answer 35668.7898 . b. Determine the number Prantl = Answer 3.083 . c. Determine Nuselt number = Answer d. Convection coefficient = Answer

The liquid food is heated in a tubular heat exchanger. The inside pipe wall temperature is 110 °C. The internal diameter of the pipe is 50 mm. The product flows at 0.7 kg/s. If the initial temperature of the product is 7 °C, calculate the convective heat transfer coefficient. The thermal properties of the product are as follows: specific heat = 3.7 kJ / (kg °C), thermal conductivity = 0.6 W / (m °C), product viscosity = 500 x 10-6 Pa s, density = 1000 kg / m³ , product viscosity at 110 °C = 410 x 10-6 Pa s. a. Determine Reynolds number = Answer 35668.7898 . b. Determine the number Prantl = Answer 3.083 . c. Determine Nuselt number = Answer d. Convection coefficient = Answer

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter7: Forced Convection Inside Tubes And Ducts

Section: Chapter Questions

Problem 7.33P

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A: Given data

Question

a. Determine Reynolds number = Answer
35668.7898
.

b. Determine the number Prantl = Answer
3.083
.

c. Determine Nuselt number = Answer

d. Convection coefficient = Answer
W/m² °C.

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