A 50 mm internal diameter horizontal steel pipe carrying steam is covered by a 50 mm...

A 50 mm internal diameter horizontal steel pipe carrying steam is covered by a 50 mm thick layer of a ceramic insulation material and is tightly wrapped with a 0.5 mm thick layer of clean aluminum foil. The wall thickness of the steel pipe is 3.9 mm. The entire pipe is surrounded by air at 20°C. The emissivity of the aluminum foil can be taken as 0.05. Determine the steady-state temperature of the outside surface of the aluminum foil if the temperature of the inner surface of the steel tube is 122°C. The thermal conductivity values are: for steel: 45 W/(m.K), for the insulation: 0.07 W/(m.K); for aluminum foil: 167 W/(m.K). {Hint: you have to account for both convective and radiation heat loss to the surroundings.}

Expert Solution

queen_honey_blossom answered 6 months ago

The steel pipe (100 mm outer diameter) is covered with two layers of insulation. The 40...

The steel pipe (100 mm outer diameter) is covered with two layers of insulation. The 40 mm thick inner layer has a thermal conductivity of 0.07 W / (mK). Outer layer, 20 mm thick has a thermal conductivity of 0.15 W / (m K). The pipe is used to drain 500 kPa pressurized steam. The temperature on the outer insulation surface is 24 ° C. If the pipe is 8 m long, determine the following: (assuming that the conduction heat...

) A 50 mm-diameter propeller was installed in a 150 mm-diameter water pipe and the propeller...

) A 50 mm-diameter propeller was installed in a 150 mm-diameter water pipe and the propeller speed was measured for a range of water discharge in the pipe. The water had a density and dynamic viscosity of 1000 kg/m3 and 0.00112 Ns/m2 respectively. The measured results were as follows: Q (litres/s): 12 28 45 63 95 120 160 180 N (rps): 5 10 15 20 30 40 60 80 Plot the dependence of propeller coefficient against propeller Reynolds number. A...

(c) A 50 mm-diameter propeller was installed in a 150 mm-diameter water pipe and the propeller...

(c) A 50 mm-diameter propeller was installed in a 150 mm-diameter water pipe and the propeller speed was measured for a range of water discharge in the pipe. The water had a density and dynamic viscosity of 1000 kg/m3 and 0.00112 Ns/m2 respectively. The measured results were as follows: Q (litres/s): 12 28 45 63 95 120 160 180 N (rps): 5 10 15 20 30 40 60 80 Plot the dependence of propeller coefficient against propeller Reynolds number. A...

Air flows in a pipe with a diameter, D=50 mm. The inlet conditions are: M1 =...

Air flows in a pipe with a diameter, D=50 mm. The inlet conditions are: M1 = 3; total pressure, P01 = 1000 kPa absolute; and temperature, T1 = 550 K. The friction coefficient is, f = 0.004. The exit Mach number decreases with the length of the pipe. Plot the following while the exit Mach number to be changed from 2.5 to 0.99 with decrements of ?M=0.01: a) L, length of the pipe that is going to give the desired...

Consider a pipe (diameter of 50 mm) with air flowing through it. The inlet conditions are:...

Consider a pipe (diameter of 50 mm) with air flowing through it. The inlet conditions are: Mach 3; total pressure = 1000 kPa and 550 K. The friction coefficient (f) is 0.004. The exit Mach number decreases with the length of the pipe. Assume adiabatic, steady flow. Write a short Matlab code and plot the following, while the exit Mach number changes from 2.5 to 0.99 with increments of ?M=0.01. Find the length of the pipe that is going to...

Steam enters a horizontal 15-cm-diameter pipe as a saturated vapor at 5 bar with a velocity...

Steam enters a horizontal 15-cm-diameter pipe as a saturated vapor at 5 bar with a velocity of 10 m/s and exits at 4.5 bar with a quality of 95%. Heat transfer from the pipe to the surroundings at 300K takes place at an average outer surface temperature of 400 K. For operation at steady state, determine (a) the velocity at the exit, in m/s. (b) the rate of heat transfer from the pipe, in kW. (c) the rate of entropy...

A horizontal tapering pipe bend of 45 degree, has inlet diameter of 600 mm and outlet...

A horizontal tapering pipe bend of 45 degree, has inlet diameter of 600 mm and outlet diameter of 300 mm. The pressure at its inlet end is 150 KPa and discharge through the bend is 0.5 m3/s. Determine the magnitude of the force exerted by the water on the bend.

The advertised diameter of steel rods manufactured by a certain company is 50 mm. During a...

The advertised diameter of steel rods manufactured by a certain company is 50 mm. During a routine check, five rods are selected randomly from a large lot and their diameters are measured yielding the following values: 50.16, 50.27, 50.13, 50.22, 50.32. The diameter can be assumed to be at least approximately normally distributed. At a 5% significance level, does the evidence suggest that the diameter of rods manufactured by the company is not 50 mm? Report also a p-value.

1200 cm3/sec of water at 420 K is pumped in a 40 mm internal diameter pipe...

1200 cm3/sec of water at 420 K is pumped in a 40 mm internal diameter pipe through a length of 150 m in a horizontal direction and up through a vertical length of 10 m . In the pipe there is a control valve which may be taken as equivalent to 200 pipe diameters and other pipe fittings equivalent to 60 pipe diameter. Also in the line there is a heat exchanger across which there is a loss in head...

Problem 3 (36 Pts) The steel pipe is 0.5 m long and has an internal diameter...

Problem 3 (36 Pts) The steel pipe is 0.5 m long and has an internal diameter of 60 mm and an external diameter of 80 mm. The Young’s modulus E is 200 GPa and the Poisson ratio ν is 0.32. The pipe experiences a twisting moment of 8 kNm and a bending moment of 3.5 kNm. 4p a) Sketch roughly how the angle of rotation and vertical displacement change as a function of distance from the free end of the...

Question