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A cylindrical storage tank for the collector in Problem 2 is located in the basement of the dwelling it serves. If the basement temperature is 16°C and the storage tank is 70°C, what is the heat-loss rate from the tank? The tank is a cylinder with diameter equal to its height; it is insulated with a 15-cm-thick fiberglass batt.
Problem 2
A packed bed storage system consists of a bed of crushed rock. The average diameter of the particles is 35 mm, and the sphericity was determined to be 0.75. Air is used as the heat-transfer fluid and flows through the system with a superficial bed velocity of 0.90 m/s. Calculate the pressure drop per unit length, assuming the air density is 1.15 kg/m3 and the air viscosity is 1.903 × 10-5 kg/m·s. How does this compare to the pressure drop when the particle diameter is 50 mm?
while an oil well is being drilled at a depth of 6000 ft it is observed that the top of the 8-in.-diameter steel drill
A pipeline is to be built of this steel and to minimize the wall thickness of the pipe, the stress in the walls should be as high as possible without either fracture or yielding. Inspection techniques ensure that there are no cracks longer than 2 ..
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Find the values of z0 and θ0 if w = 0 corresponds to z = ∞.
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