Engineering, 14.09.2019 00:30 Shami7457
Steam enters a turbine with an isentropic efficiency of 83.0% at 300. psia, 800, ℉, and exhausts to a condenser at 0.250 psia. the boiler feedwater is heated in a single open-loop regenerator with steam extracted from the turbine at 100. psia. saturated liquid leaves the regenerator at the pressure of the extraction steam. neglecting all pump work, determine the a) percent mass flow of steam extracted from the turbine, b) turbine power output per unit mass flow of steam, c) system thermal efficiency, d) turbine power output per unit mass flow of steam when the regenerator is not in use, e) system thermal efficiency when the regenerator is not in use, and f) percent increase in system thermal efficiency produced by the regenerator
Answers: 1
Engineering, 04.07.2019 18:10
Aloaded platform of total mass 500 kg is supported by a dashpot and by a set of springs of effective stiffness 72 kn/m. it is observed that when the platform is depressed through a distance x = 12.5 cm below its equilibrium position and then released without any initial velocity; it reaches its equilibrium position in the shortest possible time without overshoot. find the position and velocity of the loaded platform 0.10 sec. after its release. if a further load of 400 kg is added to the platform, find, i) the frequency of damped vibrations, and i) the amplitude of vibration after 2 complete oscillations, given that the initial amplitude is 15 cm.
Answers: 1
Engineering, 04.07.2019 18:10
Water at 55c flows across a flat plate whose surface temperature is held constant at 95c. if the temperature gradient at the plate's surface for a given value of x is 18 c/mm, find a) local heat transfer coefficient. b) heat flux
Answers: 3
Engineering, 04.07.2019 19:20
A21-tooth spur pinion mates with a 28-tooth gear. the diametral pitch is 3 teeth/in and the pressure angle is 20°, find the following values: the addendum, dedendum, circular pitch, tooth thickness, and base circle diameters.
Answers: 2
Engineering, 06.07.2019 03:20
Explain in your own word the concept of a solid solution, in alloys, and how it can be created.
Answers: 3
Steam enters a turbine with an isentropic efficiency of 83.0% at 300. psia, 800, ℉, and exhausts to...
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