Hot fluid "C,= 2562 J/kg.k, Pr 51.3, µ = 5.22E-3 Pa.s,k 0.260 W/m.K" flows at 0.9 kg/min inside a 3-mm diameter, thin- walled tube. The tube is coiled and %3D submerged in a water bath maintained at 23°C. The fluid experiences a temperature drop of 65°C and leaves the tube at 35°C. What is the required length of the tube "m"? Neglect heat transfer · enhancement associated with the coiling. Assume fully developed flow, if turbulent flow use Dittus, Boelter equation: Nu = 0.023 Re Pr %3D

Hot fluid "C,= 2562 J/kg.k, Pr 51.3, µ = 5.22E-3 Pa.s,k 0.260 W/m.K" flows at 0.9 kg/min inside a 3-mm diameter, thin- walled tube. The tube is coiled and %3D submerged in a water bath maintained at 23°C. The fluid experiences a temperature drop of 65°C and leaves the tube at 35°C. What is the required length of the tube "m"? Neglect heat transfer · enhancement associated with the coiling. Assume fully developed flow, if turbulent flow use Dittus, Boelter equation: Nu = 0.023 Re Pr %3D

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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2. Supplementary Problem Dry and saturated steam at 6 Mpa abs. enters a 40 m length of 11.5 cm O.D. steel pipe at a flow rate of 0.12 kg/s. The pipe is covered with 5 cm thick asbestos insulation ( k = 0.022 W/m-K). The pipe is located in a tunnel with stagnant air temperature of 27°C. The unit outside convective coefficient is 10 W/m2-K. Neglecting steam film and pipe wall resistances, determine the mass of steam. A. 4.86 kg/hr B. 3.86 kg/hr C. 5.86 kg/hr D. 6.86 kg/hr Slitann The temperature of the outer surface of the pipe is equal to that of the steam since the resistance of metal pipe and vapor are negligible. Vapor temperature, t, = t2 = tat @ 6 Mpa = 275°C. RT = R2 + Ro %3D