2. Electric power is to be generated in a hydroelectric power plant that receives water at a rate of 70 m/s from an elevation of 65 m using a turbine-generator with an efficiency of 85 percent. When frictional losses in piping are disregarded, the electric power output of this plant is (a)3.9 MW (b) 38 MW (c) 45 MW (d) 53 MW (e) 65 MW

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Q2
1. Drive the relation
mt Vavg - mg Vg
- vg
Vfg =
mf
2. Electric power is to be generated in a hydroelectric power plant that receives
water at a rate of 70 m'/s from an elevation of 65 m using a turbine-generator with
an efficiency of 85 percent. When frictional losses in piping are disregarded, the
electric power output of this plant is
(a)3.9 MW (b) 38 MW (c) 45 MW
(d) 53 MW
(e) 65 MW
3. What is the difference between the classical and the statistical approaches to
thermodynamics?
4. Make a control volume around the turbine in the steam power plant in Fig. 1.1
and list the flows of mass and energy located there.
Flue gas
Steam
Generator
Turbine
unup
Coal
Silo
Chimney
Power
grid
Gas
Ash
purifier
Coal
grinder
1
separator
Gypsum
Pump
District
heating
Heat
Fly
ash
exchanger
Slag
Air
Figure 1.1 Schematic diagram of a steam power plant
Transcribed Image Text:Q2 1. Drive the relation mt Vavg - mg Vg - vg Vfg = mf 2. Electric power is to be generated in a hydroelectric power plant that receives water at a rate of 70 m'/s from an elevation of 65 m using a turbine-generator with an efficiency of 85 percent. When frictional losses in piping are disregarded, the electric power output of this plant is (a)3.9 MW (b) 38 MW (c) 45 MW (d) 53 MW (e) 65 MW 3. What is the difference between the classical and the statistical approaches to thermodynamics? 4. Make a control volume around the turbine in the steam power plant in Fig. 1.1 and list the flows of mass and energy located there. Flue gas Steam Generator Turbine unup Coal Silo Chimney Power grid Gas Ash purifier Coal grinder 1 separator Gypsum Pump District heating Heat Fly ash exchanger Slag Air Figure 1.1 Schematic diagram of a steam power plant
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