1. A generating station has an overall efficiency of 15% and 0-75 kg of coal is burnt per kWh by the station. Determine the calorific value of coal in kilocalories per kilogram. [7644 kcal/kg] A 7 AALAI

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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]
Transcribed Image Text: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]
STATION
1. A generating station has an
overall efficiency of 15% and 0-75 kg
of coal is burnt per kWh by the
station. Determine the calorific
value of coal in kilocalories per
kilogram. [7644 kcal/kg]
2. A 75 MW steam power station
uses coal of calorific value of 6400
kcal/kg. Thermal efficiency of the
station is 30% while electrical
efficiency is 80%. Calculate the coal
consumption per hour when the
station is delivering its full output.
[42 tons]
3. A 65,000 kW steam power station
uses coal of calorific value 15,000
kcal per kg. If the coal consumption
kWh is 0-5 kg and the load factor
of the station is 40%, calculate (i) the
overall efficiency (ii) coal
per
consumption per day. [(i) 28.7% (ii)
312 tons]
4. A 60 MW steam power station has
a thermal efficiency of 30%. If the
coal burnt has a calorific value of
6950 kcal/kg, calculate :
(i) the coal consumption per kWh,
(ii)the coal consumption per day.
[(i) 0-413 kg (ii) 238 tons]
Transcribed Image Text:STATION 1. A generating station has an overall efficiency of 15% and 0-75 kg of coal is burnt per kWh by the station. Determine the calorific value of coal in kilocalories per kilogram. [7644 kcal/kg] 2. A 75 MW steam power station uses coal of calorific value of 6400 kcal/kg. Thermal efficiency of the station is 30% while electrical efficiency is 80%. Calculate the coal consumption per hour when the station is delivering its full output. [42 tons] 3. A 65,000 kW steam power station uses coal of calorific value 15,000 kcal per kg. If the coal consumption kWh is 0-5 kg and the load factor of the station is 40%, calculate (i) the overall efficiency (ii) coal per consumption per day. [(i) 28.7% (ii) 312 tons] 4. A 60 MW steam power station has a thermal efficiency of 30%. If the coal burnt has a calorific value of 6950 kcal/kg, calculate : (i) the coal consumption per kWh, (ii)the coal consumption per day. [(i) 0-413 kg (ii) 238 tons]
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