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Estimate the power (W/m2) required to maintain a brass plate at ?Te = 15°C while boiling saturated water at 1 atm.
Estimate the nucleate pool boiling heat transfer coefficient for water boiling at atmospheric pressure on the outer surface of a platinum-plated
Derive the nodal finite-difference equations for the following configurations.
Describe and compare the modes of heat loss through the single-pane and double-pane window assemblies shown in the sketch below.
Determine the rate of heat loss in Btu/h from the wall of a building in a 10-mph wind blowing parallel to its surface
Determine the temperature at the four nodes shown in the figure. Assume steady conditions and two-dimensional heat conduction
Develop a reasonable layout of nodes and control volumes for the geometry shown in the sketch below. Provide a scale drawing showing the problem
Develop the control volume difference equation for one-dimensional steady conduction in a fin with variable cross-sectional area A(x) and perimeter P(x).
After a long period of operation, all the water is evaporated from the plate and its surface is dry (case B)
Determine the fraction of the total, hemispherical emissive power that leaves a diffuse surface in the directions p/4
Dry air at 35°C and a velocity of 15 m/s flows over a long cylinder of 20-mm diameter, the cylinder is covered with a thin porous coating saturated with water
Consider two long vertical plates maintained at uniform temperatures Ts,1 > Ts,2. The plates are open at their ends and are separated by the distance 2L.
Consider the two-dimensional grid (?x = ?y) representing steady-state conditions with no internal volumetric generation for a system with thermal conductivity
Consider two large (infinite) parallel planes that are diffuse-gray with temperatures and emissivities of T1, e1 and T2, e2.
Consider two-dimensional, steady-state conduction in a square cross section with prescribed surface temperatures
Consider weather conditions for which the prevailing wind blows past the penthouse tower on a tall building. The tower length in the wind direction is 10m
Copper-coated, epoxy-fi1led fiberglass circuit boards are treated by heating a stack of them under high pressure as shown in the sketch.
Copper spheres of 20-mm diameter are quenched by being dropped into a tank of water that is maintained at 280 K.
Consider the radial diffusion of a gaseous species (A) through the wall of a plastic tube (B), and allow for chemical reactions that provide for the depletion
Consider the directionally selective surface having the directional emissivity as shown. Assuming that the surface is isotropic in the F direction
Consider the following fluids, each with a velocity of V = 5 m/s and a temperature of Try; = 20°C, in cross flow over a 10-mm diameter cylinder maintained
Consider flow in a circular tube within the test section length (between 1 and 2) a constant heat flux q"s is maintained.
Derive an expression for the midpoint temperature T2 in terms of the thermal and geometric parameters of the system.
Consider a thin electrical heater attached to a plate and backed by insulation. Initially, the heater and plate are at the temperature of the ambient air, T8.
Consider a thermal storage system in which the phase change material (paraffin) is housed in a large container whose bottom, horizontal surface is maintained