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An uninsulated steam pipe is used to transport high-temperature steam from one building to another. The pipe is of 0.5-m diameter, has a surface temperature of 150°C, and is exposed to ambient air at -10°C. The air moves in cross flow over the pipe with a velocity of 5 m/s.
(a) What is the heat loss per unit length of pipe?
(b) Consider the effect of insulating the pipe with a rigid urethane foam (k = 0.026 W/m · K). Evaluate and plot the heat loss as a function of the thickness 8 of the insulation layer for 0 8 50 mm.
a pistoncylinder setup contains 0.1 kg of saturated liquid and vapor water at 100 kpa with quality 25. the mass of the
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14. For each of the following F values, indicate whether the F is statistically significant at the specified alpha level:a. F = 4.80, df = 4, 40 α = 0.01b. F = 5.02, df = 3, 60, α = 0.001
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one kilogram of water at 300degc expands against a piston in a cylinder until it reaches ambient pressure 100 kpa at
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the environmental conditions in a room are to be regulated so that the dry bulb temperature will be greater than or
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a steam power plant utilizes the rankine cycle. steam enters the turbine at 50 bar and 500oc respectively. condenser
(a) Find the rate of heat transfer (kW) to the water. (b) Draw a schematic of the system. (c) Determine the air outlet temperature (°C)
before installing the water pipes in a new house an engineer measured the pressure in main water line near the house to
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