Engineering, 05.05.2020 04:59 uc22912
3. You’ve developed a cold air standard Brayton cycle with a heat input from combustion of 5.0 x 106 Btu/h. Air enters the turbine at 2800°R and exits at 520°R, and the cycle has a compressor-pressure ratio of 12. If the specific heat is evaluated at 520°R, and the turbine and compressor both have isentropic efficiencies of 95%, what is the net power developed by the cycle, in hp?
Answers: 2
Engineering, 04.07.2019 18:10
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Engineering, 04.07.2019 18:10
Thermal stresses are developed in a metal when its a) initial temperature is changed b) final temperature is changed c) density is changed d) thermal deformation is prevented e) expansion is prevented f) contraction is prevented
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Engineering, 04.07.2019 18:10
Apipe with an outside diameter of 15 cm is exposed to an ambient air and surrounding temperature of -20°c. the pipe has an outer surface temperature of 65°c and an emissivity of 0.85. if the rate of heat loss from the pipe surface is 0.95 kw per meter of length, the external convective heat transfer coefficient (h) is: (a) 12.5 w/m"k (b) 18.6 w/mk (c) 23.7 w/mk (d) 27.9 w/mk (e) 33.5 w/mk
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Engineering, 04.07.2019 18:10
Which of the following components of a pid controlled accumulates the error over time and responds to system error after the error has been accumulated? a)- proportional b)- derivative c)- integral d)- on/off.
Answers: 2
3. You’ve developed a cold air standard Brayton cycle with a heat input from combustion of 5.0 x 106...
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