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The condenser of a steam power plant consists of AISI 302 stainless steel tubes (k s = 15 W/m · K) each of outer and inner diameters Do = 30 mm and Di = 26 mm
The condenser of a steam power plant consists of a square (in-line) array of 625 tubes, each of 25-mm diameters;
The evaporator section of a heat pump is installed in a large tank of water, which is used as a heat source during the winter
The directional total emissivity of nonmetallic materials may be approximated as e?, = en, cos ?, where en, is the normal emissivity.
The addition of aluminum fins has been suggested to increase the rate of heat dissipation from one side of an electronic device 1 m wide and 1 m tall.
The air conditioning system in a new Chevrolet Van for use in desert climates is to be sized. The system is to maintain an interior temperature of 20°C
The air inside a chamber at T8,i = 50°C is heated convectively with h; = 20 W/m2 · K by a 200-mm-thick wall having a thermal conductivity of 4 W/m ·K
The average free convection coefficient for the exterior surfaces of a long, horizontal rectangular duct exposed to a quiescent fluid can be estimated
The base plate of an iron has a thickness of L = 7 mm and is made from an aluminum alloy (p = 2800 kg/m3 ·c = 900 J/kg · K, k = 180 W/m · K, e = 0.80)
The chief engineer at a university that is constructing a large number of new student dormitories decides to install a counter flow concentric tube
The components of a vertical circuit board, 150 mm on a side, dissipate 5 W. The back surface is well insulated and the front surface is exposed to quiescent
The 50-mm peephole of a large furnace operating at 450°C is covered with a material having t = 0.8 and p = 0 for irradiation originating from the furnace
The 4-m by 4-m horizontal roof of an uninsulated aluminum melting furnace is comprised of a 0.08-m-thick fireclay brick refractory covered by a 5-mm-thick steel
The compartment heater of an automobile exchanges heat between warm radiator fluid and cooler outside air, the flow rate of water is large compared to the air
The Clean Air Act prohibited the production of chlorofluorocarbons (CFCs) in the United States as of 1996.
The air passage for cooling a gas turbine vane can be approximated as a tube of 3-mm diameter and 75-mm length.
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