Engineering, 25.10.2019 20:43 Bri0929
A2-mm-diameter electrical wire is insulated by a 2-mm-thick rubberized sheath (k = 0.13 w/m k), and the wire/sheath interface is characterized by a thermal contact resistance of r"t, c= 3x10-4 m2 k/w. the convection heat transfer coefficient at the outer surface of the sheath is 10 w/m2 k, and the temperature of the ambient air is 20o c. if the temperature of the insulation may not exceed 50o c, what is the maximum allowable electrical power that may be dissipated per unit length of the conductor? what is the critical radius of the insulation?
Answers: 3
Engineering, 04.07.2019 18:10
The temperature of air decreases as it is compressed by an adiabatic compressor. a)- true b)- false
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Engineering, 04.07.2019 18:10
Give heat transfer applications for the following, (i) gas turbines (propulsion) ) gas turbines (power generation). (iii) steam turbines. (iv) combined heat and power (chp). (v) automotive engines
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Engineering, 04.07.2019 18:20
Most leaks in reciprocating air compressors can be detected and minimized by: (clo4) a)-detecting leakage areas using ultrasonic acoustic detector. b)-tightening joints and connections c)-replacing faulty equipment d)-all of the given options
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Engineering, 04.07.2019 18:20
Derive the correction factor formula for conical nozzle i=-(1+ cosa) and calculate the nozzle angle correction factor for a nozzle whose divergence hal-fangle is 13 (hint: assume that all the mass flow originates at the apex of the cone.
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A2-mm-diameter electrical wire is insulated by a 2-mm-thick rubberized sheath (k = 0.13 w/m k), and...
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