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The absorber plate and the adjoining cover plate of a flat-plate solar collector are at 70 and 35°C, respectively, and are separated by an air space of 0.05 m
Special coatings are often formed by depositing thin layers of a molten material on a solid substrate
Show in a qualitative manner on T versus t coordinates, the temperatures at the center and at the surface for each sphere as a function of time.
Steady-state temperatures (K) at three nodal points of a long rectangular rod are as shown. The rod experiences a uniform volumetric generation rate of 5 X 107
Steady-state temperatures at selected nodal points of the symmetrical section of a flow channel are known to be T2 = 95.47°C, T3 = 117.3°C
Spheres of 40-mm diameter heated to a uniform temperature of 400°C are suddenly removed from the oven and placed in a forced-air bath operating at 25°C
Solar flux of 900 W/m2 is incident on the top side of a plate whose surface has a solar absorptivity of 0.9 and an emissivity of 0.1.
Suppose that a pipe carrying a hot fluid with an external temperature of Ti and outer radius ri is to be insulated with an insulation material of thermal
Steam having a quality of 98% at a pressure of 1.37 A? 105 N/m2 is flowing at a velocity of 1 m/s through a steel pipe of 2.7 cm OD and 2.1 cm ID
Steel balls 12 mm in diameter are annealed by heating to 1150 K and then slowly cooling to 400 K in an air environment for which T8, = 325 K and h = 20 W/m2 · K
Steam at a temperature of 250°C flows through a steel pipe (AISI 1010) of 60-mm inside diameter and 75-mm outside diameter
Stainless steel (AISI 304) ball bearings, which have uniformly been heated to 850°C, are hardened by quenching them in an oil bath that is maintained at 40°C.
The 150-mm-thick wall of a gas-fired furnace is constructed of fire-day brick (k = 1.5 W/m · K. p = 2600 kg/m · c p = 1000 J/kg · K) and is well insulated
Superheated steam at 575°C is routed from a boiler to the turbine of an electric power plant through steel tubes (k = 35 W/m · K) of 300 mm inner diameter
Steel is sequentially heated and cooled (annealed) to relieve stresses and to make it less brittle.
Steel is carburized in a high-temperature process that depends on the transfer of carbon by diffusion.
Saturated vapor from a chemical process condenses at a slow rate on the inner surface of a vertical, thin-walled cylindrical container of length
Small diameter electrical heating elements dissipating 50 W/m (length normal to the sketch) are used to heat a ceramic plate of thermal conductivity 2 W/m · K.
Saturated ethylene glycol at 1 atm is heated by a horizontal chromium-plated surface which has a diameter of 200 mm and is maintained at 480 K.
Sheet steel emerging from the hot roll section of a steel mill has a temperature of 1200 K, a thickness of d = 3 mm, and the following distribution
Saturated steam at 1 atm condenses on the outer surface of a vertical. 100-mm-diameter pipe 1 m long, having a uniform surface temperature of 94°C
Saturated steam at 0.1 bar condenses with a convection coefficient of 6800 W/m2 · K on the outside of a brass tube having inner and outer diameters
Saturated process steam at 1 atm is condensed in a shell-and-tube heat exchanger (one shell, two tube passes). Cooling water enters the tubes at 15°C
Saturated ethylene glycol vapor at 1 atm is exposed to a vertical plate 300 mm high and 100 mm wide having a uniform temperature of 420 K.
Slug flow is an idealized tube flow condition for which the velocity is assumed to be uniform over the entire tube cross section.