Part of a laboratory experiment consists of a long ¾-in.-OD copper tube embedded in the center of a square insulator (asbestos with k = 0.087Btu/h·ft-°F) with 3-in. sides. The purpose of the pipe is to deliver hot water at 30 psia to the system, but the system requires that the water must not be boiling. The energy loss per foot of pipe is measured to be 35 Btu/h- ft, and the outside surface temperature of the asbestos is 150°F. Assuming the water and the tube are at the same temperature, does the water boil?

Part of a laboratory experiment consists of a long ¾-in.-OD copper tube embedded in the center of a square insulator (asbestos with k = 0.087Btu/h·ft-°F) with 3-in. sides. The purpose of the pipe is to deliver hot water at 30 psia to the system, but the system requires that the water must not be boiling. The energy loss per foot of pipe is measured to be 35 Btu/h- ft, and the outside surface temperature of the asbestos is 150°F. Assuming the water and the tube are at the same temperature, does the water boil?

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

See similar textbooks

Similar questions

Harry up plz
Find the heat transfer rate of water that enters a tube with a flow rate of 0.015 kg/s and an inlet temperature of 20°C. The tube, which has a length of 6 m and a diameter of 15 mm, has a surface temperature of 30°C. (Use the thermodynamic properties of water at 300 K)
Select the letter of the correct statement. Write the answer with calculations, drawing, rules or explanation 2-) A scientist suggests the following correlation be used for square tubes in a liquid cross-flow situation (Nu = 0.102 Re0.675 Ppl/3). Water (k = 0.61 W/m.K, Pr= 6) flows across a 1-cmsquare tube with a Reynolds number of 10,000. The convection heat transfer coefficient is:(A-) 5.7 kW/m?.K(B-) 8.3 kW/m?.K(C- ) 11.2 kW/m?.K(D-) 18.1 kW/m?.K.
Based on the picture above, make a schematic and determine the average temperature difference over the entire length of the tube (ATLM). (value 25)
A circular tube (internal diameter=8 mm, length=20 m) subjected to a uniform heat flux of 30000 W/m2 on its surface. Water (ρ=1000 kg/m3, k=0.6 W/mK, ν=8x10-7 m2/s, cp=4.2 kJ/kg0C, Pr=6) enters the tube at 15 oC with a velocity of 1.1 m/s and leaves at 50 0C. Surface temperature of the tube at the inlet is
Liquid mercury is flowing at 0.9kg/s through a 5-cm diameter tube with inlet and outlet mean temperatures of 100°C and 200°C, respectively. The tube surface temperature is maintained constant at 250°C. Determine the tube length using the Dittus-Boelter equation, in m. ______ m
A long 3-mm diameter rod of steel (ρ = 7840 kg/m3, c = 460 J/kgK, k = 43 W/mK)has a uniform initial temperature of 650C. The rod is then suddenly immersed in alarge container of 25C water. The hot rod causes the water immediately surroundingthe rod to boil, giving rise to a heat transfer coefficient of 5600 W/m2K. The boilingstops when the rod reaches a temperature of 100C, at which time the heat transfercoefficient becomes 750 W/m2K. Find the time period during which boiling occursand the total time required for the rod to reach a temperature of 40C. Use acharacteristic length for this problem.
A liquid is heated from 20 to 70 oC as it flows at 0.025 kg/s through a steel tube of 10 mm and 12m long. A uniform heat flux is maintained on the tube surface. Using the following liquid properties ρ = 1000 kg/m3, Cp = 4100 J/kg.K, k = 0.45 W/m.K, Pr = 10, μ = 2x10-3 kg/s.m. Calculate the average heat flux on the tube. Calculate the heat transfer coefficient at end of tube Calculate the surface temperature at exit and the heat transfer coefficient for first 1m of pipe?
Liquid sodium is to be heated from 500 K to 600 K by passing it at a flow rate of 5.0 kg/s through a 5-cm-ID tube whose surface is maintained at 620 K. What length of tube is required?
An oil has 0.62 inch steel tube, through which flows an oil. The properties of oil are as follows; μ = 0.034 lbs/ft-sec, μb = 0.044 lbs/ft-sec, μw = 0.004 lbs/ft-sec, and specific gravity at 60°F is 0.899. The oil neters at a temperature of t1 = 60°F and flows with an average velocity of 4 ft/sec. The inside surface area is 0.1613 ft2 per foot length, and the inside sectional area is 0.3019 in2. The length of one pass of the tube is 10 feet. Considering steam at 215°F surround the tubes. Assume that the inside surface temperature of the pipe is 210°F and a bulk temperature of 72°F. If the specific heat of oil is 0.5 btu/lbs-°F and its conductivity k = 0.08 Btu-ft/hr-°F-ft2, what is the temperature at the end of 10 feet pass. Answer: t = 61.18 °F Show the complete solution.
Determine the expected Fanning friction factor for water at 28 degrees Celsius flowing through a smooth tube whose ID is 15mm, at a velocity of 0.45 m/s