Question 4 a) There are many methods employed to generate electrical energy. In your words, compare the generation methods that you studied in term of environmental impact, efficiency and the cost of generation. b) A hydroelectric station has a reservoir with water volume of 5 x 106 m3 and a head of 150 m. The density of water is 1kg/m3 and the acceleration of gravity is 9.81 m/s?. i. Calculate the electrical energy available. ii. If the overall efficiency is 80%, determine the generated power to the nearest MW if the water is discharged at a rate of 120m/s. c) The dam catchment area for a hydroelectric station covers an area of 2 square km with water capacity of 5 million cubic meter. Water head for the dam is 50 m. If the turbine and generator efficiencies 85% and 95% respectively, calculate the total electrical energy in kWh that can be generated by the station. If an electrical load of 15000 kW is connected to the station for a duration of 4 hours, determine the drop in water level of the dam. d) A 60 MW thermal station has overall efficiency of 30%. If coal for the station has an energy of 6950 kcal per kg, determine: i. Coal usage per kWh. ii. Coal usage per day for rated electrical output.

Question 4 a) There are many methods employed to generate electrical energy. In your words, compare the generation methods that you studied in term of environmental impact, efficiency and the cost of generation. b) A hydroelectric station has a reservoir with water volume of 5 x 106 m3 and a head of 150 m. The density of water is 1kg/m3 and the acceleration of gravity is 9.81 m/s?. i. Calculate the electrical energy available. ii. If the overall efficiency is 80%, determine the generated power to the nearest MW if the water is discharged at a rate of 120m/s. c) The dam catchment area for a hydroelectric station covers an area of 2 square km with water capacity of 5 million cubic meter. Water head for the dam is 50 m. If the turbine and generator efficiencies 85% and 95% respectively, calculate the total electrical energy in kWh that can be generated by the station. If an electrical load of 15000 kW is connected to the station for a duration of 4 hours, determine the drop in water level of the dam. d) A 60 MW thermal station has overall efficiency of 30%. If coal for the station has an energy of 6950 kcal per kg, determine: i. Coal usage per kWh. ii. Coal usage per day for rated electrical output.

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

Chapter2: Fundamentals

Section: Chapter Questions

Problem 2.31P: Consider two interconnected voltage sources connected by a line of impedance Z=jX, as shown in...

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