Determine the mean heat-transfer coefficient and the quantity of heat transferred in water flowing in a horizontal tube 3 mm in diameter (d) and 2 m long (l), if ω = 0.3 m/sec; tf = 60 deg C and tω = 20 deg C. Constants: @ tf = 60oC, λf = 0.567 kcal/m-hr-oC; νf = 0.478 x 10-6 m2/sec β = 5.11 x 10-4 1/oC and Prf = 2.98. @ tω = 20oC, Pr? = 7.02

Determine the mean heat-transfer coefficient and the quantity of heat transferred in water flowing in a horizontal tube 3 mm in diameter (d) and 2 m long (l), if ω = 0.3 m/sec; tf = 60 deg C and tω = 20 deg C. Constants: @ tf = 60oC, λf = 0.567 kcal/m-hr-oC; νf = 0.478 x 10-6 m2/sec β = 5.11 x 10-4 1/oC and Prf = 2.98. @ tω = 20oC, Pr? = 7.02

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.

Chapter6: Forced Convection Over Exterior Surfaces

Section: Chapter Questions

Problem 6.45P

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Question

Determine the mean heat-transfer coefficient and the quantity of heat transferred in water flowing in a horizontal tube 3 mm in diameter (d) and 2 m long (l), if ω = 0.3 m/sec; t_f = 60 deg C and t_ω= 20 deg C.

Constants:

@ t_f = 60^oC,

λ_f = 0.567 kcal/m-hr-^oC; ν_f = 0.478 x 10^-6 m²/sec

β = 5.11 x 10^-4 1/^oC and Pr_f = 2.98.

@ t_ω = 20^oC,

Pr_?= 7.02

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