Engineering, 11.12.2019 20:31 payshencec21

(20 points) a gas-driven turbine is used to drive a small synchronous generator. the machine is wye-connected, has 4 poles, and is rated at 13.8 kv (line), 10 mva (three-phase) with a synchronous reactance of 18 ohms (negligible armature resistance). a prime mover provides the source of mechanical power that keeps the shaft speed constant at 1800 rpm. the machine is connected to the utility three-phase feeder which keeps the terminal voltage fixed at 13.8 kv, 60 hz (infinite bus). a) suppose that the generator is initially delivering 5 mva at a power factor of 0.8 lagging. calculate: i. the three-phase real and reactive power delivered to the electrical load,

Answers: 1

Show answers

Another question on Engineering

Engineering, 04.07.2019 18:10

Asingle-geared blanking press has a stroke of 200 mm and a rated capacity of 320 kn. a cam driven ram is assumed to be capable of delivering the full press load at constant force during the last 15 percent of a constant-velocity stroke. the camshaft has an average speed of 90 rev/min and is geared to the flywheel shaft at a 6: 1 ratio. the total work done is to include an allowance of 16 percent for friction a) estimate the maximum energy fluctuation b) find the rim weight for an effective diameter of 1.2 m and a coefficient of speed fluctuation of 0.10

Answers: 1

Answer

Engineering, 04.07.2019 18:10

An air compression refrigeration system is to have an air pressure of 100 psia in the brine tank and an allowable air temperature increase of 60°f for standard vapor compression cycle temperatures of 77 f entering the expansion cylinder and 14 f entering the compression cylinder, calculate the coefficient of performance a. 2.5 b 3.3 c. 4.0 d. 5.0

Answers: 3

Answer

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.

Answers: 3

Answer

Engineering, 04.07.2019 19:10

Which of the following is the most important advantage of a large field of view? a. allows larger areas to be examined b. relieves eyestrain c. minimizes parallax errors. d. increases precision in proportion to the in- crease in field of view

Answers: 2

Answer

You know the right answer?

(20 points) a gas-driven turbine is used to drive a small synchronous generator. the machine is wye-...

Questions