Question

In: Mechanical Engineering

Material A is generating heat at a rate of 11.25 x 10^3 W/m^3 and is 40cm...

Material A is generating heat at a rate of 11.25 x 10^3 W/m^3 and is 40cm thick and has a thermal conductivity of 10 W/mK. Material B is 50 cm thick with an unknown thermal conductiviy. material C is 30 cm thick and has an unknown thermal conductivity. The structure is cooled by a fluid on both sides at 25 (C) with a heat transfer coefficient of 100 W/m^2K. If your thermocouples measure T1 to be 145 (C) and T2 to be 195 (C), find the thermal conductivites of materials B and C.

Solutions

Expert Solution


Related Solutions

If the moment-generating function of X is M(t) = exp(3 t + 12.5 t2) = e3...
If the moment-generating function of X is M(t) = exp(3 t + 12.5 t2) = e3 t + 12.5 t2. a. Find the mean and the standard deviation of X. Mean = standard deviation = b. Find P(4 < X < 16). Round your answer to 3 decimal places. c. Find P(4 < X2 < 16). Round your answer to 3 decimal places.
calculate the conductive heat flux (W) for the different “feather” materials. Material “A” has a K...
calculate the conductive heat flux (W) for the different “feather” materials. Material “A” has a K of 0.036 W/mK and increases the bird’s x by 2.769 x 10-3 m. Material “B” has a K of 0.17 W/mK and increases the bird’s x by 1.308 x 10-2 m. The bird’s internal temperature is 311.0 K (we are assuming that they are endothermic) and the temperature of the ground is 260.0 K. The distance from the exterior of the bird’s skin to...
Calculate the heat flux (W / m2) through a composite wall made of material A whose...
Calculate the heat flux (W / m2) through a composite wall made of material A whose k = 40 W / m-K and has a thickness of 30 cm, a material B whose k = 0.05 W / m-K and a thickness of 3 cm; and a material C whose k = 0.004 W / m-K, its thickness is 0.5 cm.
Consider a spherical vessel filled with a substance which is generating heat at a uniform rate...
Consider a spherical vessel filled with a substance which is generating heat at a uniform rate of 10^5 W/m^3. The substance has a thermal conductivity of 20 W/mK, and the vessel has a thermal conductivity of 15 W/mK. The inner radius of the container is 0.5m and the outer radius is 0.6 m. The container is surrounded by a fluid with convection coefficient of 1000 W/m^2K and T_inf = 25 Celsius. Determine the temperature distribution T(r) by solving the differential...
Suppose heat is transferred at a rate of 500 W into 1 L of water. The...
Suppose heat is transferred at a rate of 500 W into 1 L of water. The water starts at 20˚C. a) How much heat is required to raise the water temperature to 100 ˚C? How long does this take? b) How much heat is required to boil off half the water? How long does this take? Comment on the value compared to part a. c) Plot temperature vs Q for this heating process. You should only need 3 points for...
Calculate the heat-removal factor for a collector having an overall heat loss coefficient of 10 W/m2...
Calculate the heat-removal factor for a collector having an overall heat loss coefficient of 10 W/m2 K and constructed of copper fins and tubes (k = 390 W/m?K). Tube-to-tube center distance is 12 cm, fin thickness is 0.05 cm, tube diameter is 1.5 cm, and fluid-tube heat transfer coefficient is 1000 W/m2K. The cover transmittance to solar radiation is 0.8 and is independent of direction. The solar absorptance of the absorber plate is 0.9, the collector is 1 m wide...
In laboratory tests, a new construction material was found to conduct heat at a rate of...
In laboratory tests, a new construction material was found to conduct heat at a rate of 10.2 Btu’s per hour per square meter of surface area. The temperature on one side of the wall was held at a constant 5 F while the other side was held at 70 F. The test specimen was 12.0 inches thick. What is the ambient air temperature (F) on the warm side of the wall? Assume there is free convection on the warm side...
Heat is generated uniformly at a rate of 2x105 W/m3 in a wall of thermal conductivity...
Heat is generated uniformly at a rate of 2x105 W/m3 in a wall of thermal conductivity 25W/m K and thickness 60 mm. The wall is exposed to convection on both sides, with a fluid temperature of 30C and h = 50W/m2 K on the left side, a fluid temperature of 15C and h = 12 W/m2 K on the right side. (a) Determine surface temperature on each side of the wall, and (b) the maximum temperature in the wall.
adding 50.0 mL of 1.0 x 10^-3 M Sr(NO3)2 and 50.0 mL of 1.0 x 10^-3...
adding 50.0 mL of 1.0 x 10^-3 M Sr(NO3)2 and 50.0 mL of 1.0 x 10^-3 M Na2CO3wpuld produce how many grams of SrCO3 precipitate? ksp of SrCO3 = 1.1 x 10^-10
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...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT