The thermal conductivity of an insulating material used over a hot pipe varies as k =...

The thermal conductivity of an insulating material used over a hot pipe varies as k = 0.0545 (1
+ 28.4 × 10–4 T) where T is in °C and k is in W/mK. This insulation is used for a thickness of
12 cm over a pipe of diameter 0.6 m. The pipe surface is at 300°C and the outside insulation
temperature is 60°C. Determine the heat flow for a length of 5 m. Also find the mid layer
temperature.

Solutions

Expert Solution

samet mamat answered 11 months ago

Next > < Previous

Related Solutions

A new material has a measured thermal conductivity k of 200 BTU-in/hr-ft2 -°F. Is this material...

A new material has a measured thermal conductivity k of 200 BTU-in/hr-ft2 -°F. Is this material a thermal insulator or a conductor? Calculate the R and U values for a block of this material that is 3 inches thick. Now sandwich this block of material between two sheets of R-0.8 fiberboard. What is the new effective U value?

a solid material that has thermal conductivity K in kilowatts per meter-kelvin and temperature given at...

a solid material that has thermal conductivity K in kilowatts per meter-kelvin and temperature given at each point by w(x, y, z) has heat flow given by the vector field F = ?K?wand rate of heat flow across a surface S within the solid given by?K ?? ??S ?w dS. Find the rate of heat flow out of a sphere of radius 1 meter inside a large cube of copper (K=400kilowatts/m-k) with temperature function given by w(x, y, z)=20?5(x2+y2+z2)?C

In a slab of material 0.25 m thick and having a thermal conductivity of 45 W/mK,...

In a slab of material 0.25 m thick and having a thermal conductivity of 45 W/mK, the temperature °C at x under steady state is given by T = 100 + 200x – 400x2 when x is measured from one face in m. Determine the heat flow at x = 0, x = 0.125 and x = 0.25 m and also the temperatures and temperature gradients at these planes. If the difference in heat flow at these sections is due...

Suppose we have a rod of material of conductivity K = 1 and situated on the...

Suppose we have a rod of material of conductivity K = 1 and situated on the x-axis, for 0 ≤ x ≤ 1. Suppose further that the rod is laterally insulated, but has a known internal heat source f(x). The left and right ends of the rod are held at 0 ◦C (degrees Celsius). With n = 5 Solve the linear system in Jupyter using Gauss-Jordan Elimination. See the notes on the first problem of this set for hints on...

3. A stainless steel sphere of thermal conductivity 16 W/m · K with a diameter of...

3. A stainless steel sphere of thermal conductivity 16 W/m · K with a diameter of 4 cm is exposed to a convective environment of 15 W/m2 · K, 20?C. Heat is generated uniformly in the sphere at a rate of 1.0 MW/m3 . Determine the steady-state temperature of the sphere at its center and its surface. Also determine the heat flux at a radius of 1.5 cm.

A cylindrical resistor with radius K and length L is made from a material with conductivity...

A cylindrical resistor with radius K and length L is made from a material with conductivity ?. The potential difference between the circular ends is V. What is the current that flows from one end to the other? What is the resistance? Show that the resistance you found is R = ?L/A, where ? is the resistivity of the material, and A is the cross-sectional area of the cylinder. (Hint: The electric field is constant throughout the resistor, but its...

Consider a large plate of thickness 50 mm and thermal conductivity of k= 69 W/m.C in...

Consider a large plate of thickness 50 mm and thermal conductivity of k= 69 W/m.C in which heat is generated uniformly at a constant rate of 600 kW/m3. One side of the plate is insulated while the other side is subjected to convection to the environment at 30oC with a heat transfer coefficient of h= 94 W/m^2.C. considering six equal spaced nodes with a nodal spacing of 10 mm: (a) obtain the Finite Difference formulation of this problem, (b) determine...

types of plastic pipe that can be used for hot and cold water distribution: 1. 2....

types of plastic pipe that can be used for hot and cold water distribution: 1. 2. 3. List 3 types of plastic pipe used for sanitary drainage and vent piping: 1. 2. Black iron steel pipe is used for carrying ____________________ or ____________________. The cast iron pipes no-hub pipes are used for below ground or above ground?_________________ Type _____ copper pipe is the most commonly used in residential water lines. What color is the copper pipe, most commonly used in...

In a study of the thermal inertial properties of aerated concrete used as building material, average...

In a study of the thermal inertial properties of aerated concrete used as building material, average interior temperatures were investigated. These temperatures are known to have an approximately normal distribution. The claim is the average interior temperature is 22.5 degrees. A consumer advocate believes this temperature is in fact less than 22.5 degreess. To this end, he collects a sample of 15 measurements and finds the average temperature of the sample to be 20.9 degrees with standard deviation of 3.5...

Give an example for each physical, mechanical, electrical and thermal properties of material, identify practical application if it were to be used in an engineering context.

Subjects