1. A hydro-electric station has an average available head of 100 metres and reservoir capacity of 50 million cubic metres. Calculate the total energy in kWh that can be generated, assuming hydraulic efficiency of 85% and electrical efficiency of 90%. [10-423 . 106 kWh]
1. A hydro-electric station has an average available head of 100 metres and reservoir capacity of 50 million cubic metres. Calculate the total energy in kWh that can be generated, assuming hydraulic efficiency of 85% and electrical efficiency of 90%. [10-423 . 106 kWh]
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![TUTORIAL PROBLEMS FOR HYDRO STATION
1. A hydro-electric station has an average available head of 100 metres and reservoir
capacity of 50 million cubic metres. Calculate the total energy in kWh that can be
generated, assuming hydraulic efficiency of 85% and electrical efficiency of 90%.
[10-423 . 106 kWh]
2. Calculate the continuous power that will be available from hydroelectric plant having
an available head of 300 meters, catchment area of 150 sq. km, annual rainfall 1·25 m
and yield factor of 50%. Assume penstock, turbine and generator efficiencies to be
96%, 86% and 97% respectively. If the load factor is 40% what should be the rating
of the generators installed ? [7065 kW, 17662 kW]
3. A hydroelectric plant has a reservoir of area 2 sq. kilometres and of capacity 5 million
cubic meters. The net head of watr at the turbine is 50 m. If the efficiencies of turbine
and generator are 85% and 95% respectively, calculate the total energy in kWh that
can be generated from this station. If a load of 15000KW has been supplied for 4
hours, find the fall in reservoir. [5-5 . 105 kWh ; 27-8 cm]
4. It has been estimated that a minimum run-off of approximately 94 m3/sec will be
available at a hydraulic project with a head of 39 m. Determine the firm capacity and
yearly gross output. [3600 kW, 315-36 . 106 kWh]Hint. Wt. of water flowing/sec =
94 1001000. a f3 kg
5. A hydroelectric power station is supplied from a reservoir having an area of 50 km2
and a head of 50 m. If overall efficiency of the plant is 60%, find the rate at which the
water level will fall when the station is generating 30,000 kW. [7-337 mm/hour]
6. A hydro-electric plant has a catchment are of 120 square km. The available run
off is 50% with annual rainfall of 100 cm. A head of 250 m is available on the
average. Efficiency of the power plant is 70%. Find (i) average power produced (ii)
capacity of the power plant. Assume a load factor of 0.6. [(i) 3266 kW (ii) 5443
kW]](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F78af61a8-958b-4020-91ff-220983e3057e%2Ffc98fa98-2873-4e18-a941-30f5228edb5d%2F6wmraxv_processed.jpeg&w=3840&q=75)
Transcribed Image Text:TUTORIAL PROBLEMS FOR HYDRO STATION
1. A hydro-electric station has an average available head of 100 metres and reservoir
capacity of 50 million cubic metres. Calculate the total energy in kWh that can be
generated, assuming hydraulic efficiency of 85% and electrical efficiency of 90%.
[10-423 . 106 kWh]
2. Calculate the continuous power that will be available from hydroelectric plant having
an available head of 300 meters, catchment area of 150 sq. km, annual rainfall 1·25 m
and yield factor of 50%. Assume penstock, turbine and generator efficiencies to be
96%, 86% and 97% respectively. If the load factor is 40% what should be the rating
of the generators installed ? [7065 kW, 17662 kW]
3. A hydroelectric plant has a reservoir of area 2 sq. kilometres and of capacity 5 million
cubic meters. The net head of watr at the turbine is 50 m. If the efficiencies of turbine
and generator are 85% and 95% respectively, calculate the total energy in kWh that
can be generated from this station. If a load of 15000KW has been supplied for 4
hours, find the fall in reservoir. [5-5 . 105 kWh ; 27-8 cm]
4. It has been estimated that a minimum run-off of approximately 94 m3/sec will be
available at a hydraulic project with a head of 39 m. Determine the firm capacity and
yearly gross output. [3600 kW, 315-36 . 106 kWh]Hint. Wt. of water flowing/sec =
94 1001000. a f3 kg
5. A hydroelectric power station is supplied from a reservoir having an area of 50 km2
and a head of 50 m. If overall efficiency of the plant is 60%, find the rate at which the
water level will fall when the station is generating 30,000 kW. [7-337 mm/hour]
6. A hydro-electric plant has a catchment are of 120 square km. The available run
off is 50% with annual rainfall of 100 cm. A head of 250 m is available on the
average. Efficiency of the power plant is 70%. Find (i) average power produced (ii)
capacity of the power plant. Assume a load factor of 0.6. [(i) 3266 kW (ii) 5443
kW]
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