A turbine is required to generate 6-MW of electricity to serve its coverage area. If it has an efficiency of 75%, at what level (in m) must water at the source reservoir be maintained? Assume that the total losses in the transmission between the two reservoirs is 100 m. The flow through the penstock is 40 cms.

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ISBN:9781305387102
Author:Kreith, Frank; Manglik, Raj M.
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Chapter10: Heat Exchangers
Section: Chapter Questions
Problem 10.19P
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A turbine is required to generate 6-MW of electricity to serve its coverage area. If it has an
efficiency of 75%, at what level (in m) must water at the source reservoir be maintained?
Assume that the total losses in the transmission between the two reservoirs is 100 m. The
flow through the penstock is 40 cms.
a.171.47
El.?
b.180.39
c.130.39
D.121.47
El. 50 m
El. 10 m
A 50-mm diameter nozzle is attached to a 300-mm diameter pipe by flange bolts as shown.
Assume that the headloss throughout the nozzle is 10 meters. The fluid exits the nozzle as
a free jet. The fluid flowing in the pipe is water with specific weight of 9810 N/m³.
300 mm
pipe
Determine the discharge if
the pressure at the base
(point A) is 500 kPa.
50 mm
nozzle
a.1.623 cms
B
A
flange bolts
b.0.062 cms
c.0.056 cms
d.2.020 cms
What will be the total tension
on the bolts if the pressure at the base (point A) is 500 kPa?
a.33,432 N
b.33,807 N
c.37,253 N
d.36,878 N
Transcribed Image Text:A turbine is required to generate 6-MW of electricity to serve its coverage area. If it has an efficiency of 75%, at what level (in m) must water at the source reservoir be maintained? Assume that the total losses in the transmission between the two reservoirs is 100 m. The flow through the penstock is 40 cms. a.171.47 El.? b.180.39 c.130.39 D.121.47 El. 50 m El. 10 m A 50-mm diameter nozzle is attached to a 300-mm diameter pipe by flange bolts as shown. Assume that the headloss throughout the nozzle is 10 meters. The fluid exits the nozzle as a free jet. The fluid flowing in the pipe is water with specific weight of 9810 N/m³. 300 mm pipe Determine the discharge if the pressure at the base (point A) is 500 kPa. 50 mm nozzle a.1.623 cms B A flange bolts b.0.062 cms c.0.056 cms d.2.020 cms What will be the total tension on the bolts if the pressure at the base (point A) is 500 kPa? a.33,432 N b.33,807 N c.37,253 N d.36,878 N
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