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Chilled water enters a thin shelled 4 cm diameter, 200 m long pipe at 7 deg. Celsius at a rate of 0.98 kg/sec and leaves at 8 deg. Celsius. The pipe is exposed to an ambient air at 30 deg. Celsius with a heat transfer coefficient of 9 W/m^2*K. If the pipe is to be insulated with glass wool insulation (k=0.05 W/m*K) in order to decrease the temperature rise of water to 0.25 deg. Celsius, determine the required thickness of insulation.
the electric heating systems used in many houses consist of a simple duct with electrical resistance wires. air is
an air standard brayton closed cycle receives air at 1 atm and 298 k. the upper temperature and pressure limits are 5
the critical heat flux of water at 1 atm is qmax 1258.7 kwm which occurs at ?t 30c. boiling enters the transition
air undergoes a polytropic expansion process in a piston-cylinder assembly from 75 psia and 300 f to 15 psia. employing
steam exits a turbine with a mass flow rate of 2x105 kgh at a pressure of 0.008 mpa quality of 94 and velocity of 70
Given that the nominal diameter (per print) is 15.00mm +/-0.10mm, what can be said about the expected defect rate?
the man picks up a 52-ft chain and holds it just high enough so it is completely off the ground. the chain has points
an elastic exercise band is grasped and then is stretched. knowing that the tension in portion de of the band is 70
a centrifugal pump weighing 600 n and operationg at 1000 rpm is mounted on six springs of stiffness 6000 nm each. find
what is the percent change in viscosity per degree celsius for a vg-32 mineral turbine oil at 10c? at 120c? what are
geothermal steam is planned as an energy source for power generation. the steam enters and adiabatic exchanger at 2
the coefficient of restitution is 0.9 between the two 60-mm-diameter billiard balls a and b. ball a is moving in the
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