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
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
Power System Analysis and Design (MindTap Course List)
6th Edition
ISBN:9781305632134
Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Chapter3: Power Transformers
Section: Chapter Questions
Problem 3.7MCQ: Consider Figure 3.5. Match the following, those on the left to those on the right. (i) Im (a)...
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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]](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fdb79d796-dfaa-4aa3-add7-2f3231e29a1f%2Fb69ab0f8-a08d-41b9-a91b-ef28cfc042df%2Fxdkmzu_processed.jpeg&w=3840&q=75)
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]](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fdb79d796-dfaa-4aa3-add7-2f3231e29a1f%2Fb69ab0f8-a08d-41b9-a91b-ef28cfc042df%2Fx7cn9o_processed.jpeg&w=3840&q=75)
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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