Engineering, 24.03.2020 21:30 curiouscadencee
A pumped storage facility uses a 6.6 kV, 60 Hz, 4200 kVA, 3360 kW, 10 pole, three-phase synchronous machine, with a synchronous reactance of 1.13 pu. Assume a cylindrical rotor. The hydro turbine is rated 3500 kW. All losses are neglected. 1. Hydro generator capabilities (a) Compute the hydro turbine speed to obtain a 60 Hz output; the range of the power factor of the generator; the rated line current. Compute the value of synchronous reactance in ohm. (b) Draw the per-phase equivalent circuit. Assume Y-connected generator windings. Present and explain the functions of the hydro turbine and generator controls.
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Engineering, 04.07.2019 18:10
The thermal expansion or contraction of a given metal is a function of the f a)-density b)-initial temperature c)- temperature difference d)- linear coefficient of thermal expansion e)- final temperature f)- original length
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Engineering, 04.07.2019 18:10
Assuming compressible flow of air and that the measurements are done at flagstaff a pitot static tube that gives the difference of total and static pressure measures 0.35 m of mercury. what is the velocity of air? assume the temperature to be 300k. (submit your excel or matlab calculation sheet)
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Engineering, 04.07.2019 18:10
What are the two (02) benefits, which may result from a successful implementation of preventive maintenance (pm) program in an organization? (clo3)a)- lean manufacturing b)-overlapping responsibilities c)-the planner is not qualified d)-accurate contractor information e)-reduction in equipment redundancies f)-accurate stores information
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Engineering, 04.07.2019 19:10
Air inially occupying a volume of 1 m2 at 100 kpa, 27 c undergoes three internally reversible processes in series. process 1-2 compression to 500 kpa during which pv constant process 2-3 adiabatic expanslon to 100 kpa process 3-1: constant-pressure expansion to 100 kpa (a) calculate the change of entropy for each of the three processes. (b) calculate the heat and work involved in each process. (c) is this cycle a power cycle or refrigeration cycle?
Answers: 3
A pumped storage facility uses a 6.6 kV, 60 Hz, 4200 kVA, 3360 kW, 10 pole, three-phase synchronous...
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