subject
Engineering, 13.10.2020 03:01 delaneyjane2035

The wall can be modelled as a 1-D steady-state system. The conductivity of the wall K(T)= ko+ α(T-To), where k0 = 0.62 W/m-K is the conductivity at room temperature, T0 = 300 K is a reference temperature, and a = 0.0012 W/m-K^2 . The outer surface of the wall experiences only convection with a gas a Tg, out = 300 K and hout = 25 W/m^2 K. The inner surface experiences both convection and radiation. Radiation takes place with a flame at Tflame = 1900 K and the emissivity of the wall is ε = 0.5. Convection takes place with gases at Tg. in = 800 K and hin = 65 W/m²K. The thickness of the wall is L = 8 cm. Required:
a. Start with the proper form of the heat conduction equation and simplify it to obtain the governing equation for this problem.
b. Indicate the boundary conditions.
c. Solve the differential equation in terms of the variables in the statement. After applying the boundary conditions, you will obtain a system of six equations with six variables. You can easily solve this system of equations using EES
d. Plot the temperature profile using EES or Matlab. Explain why the temperature profile is not linear.
e. What is the heat flux through the wall (analytical expression and numerical value)?

ansver
Answers: 2

Other questions on the subject: Engineering

image
Engineering, 03.07.2019 15:10, EmilySerna
Heat is added to a piston-cylinder device filled with 2 kg of air to raise its temperature 400 c from an initial temperature of t1 27 cand pressure of pi 1 mpa. the process is isobaric process. find a)-the final pressure p2 b)-the heat transfer to the air.
Answers: 1
image
Engineering, 04.07.2019 18:10, aliopqwas
Condition monitoring is a major component of. (clo4) a)- predictive maintenance. b)-preventive maintenance c)-proactive maintenance d)-reactive maintenance.
Answers: 1
image
Engineering, 04.07.2019 18:20, krojas015
Asolid cylinder is concentric with a straight pipe. the cylinder is 0.5 m long and has an outside diameter of 8 cm. the pipe has an inside diameter of 8.5 cm. the annulus between the cylinder ad the pipe contains stationary oil. the oil has a specific gravity of 0.92 and a kinematic viscosity of 5.57 x 10-4 m2/s. most nearly, what is the force needed to move the cylinder along the pipe at a constant velocity of 1 m/s?
Answers: 3
image
Engineering, 04.07.2019 19:10, jennymares
Abarometer contains mercury with a density of 13600 kg/m3. atmospheric conditions are 95.8 kpa and 20 °c at 20 °c, the vapor pressure of the mercury is 0.000173 kpa. the column of mercury will rise to a height of most nearly. select one: a)- 0.38 m b)- 0.82 m c)- 0.48 m d)- 0.72 m
Answers: 1
You know the right answer?
The wall can be modelled as a 1-D steady-state system. The conductivity of the wall K(T)= ko+ α(T-To...

Questions in other subjects:

Konu
Geography, 16.10.2020 05:01
Konu
Chemistry, 16.10.2020 05:01
Konu
Social Studies, 16.10.2020 05:01