Q3/In 2001, the United States produced 51 percent of its electricity in the amount of 1.878* 1012 kWh from coalfired power plants. Taking the average thermal efficiency to be 34percent, determine the amount of thermal energy rejected by the coal-fired power plants inthe United States that year.Q4 / A coal-burning steam power plant produces a net power of 300 MW with an overallthermal efficiency of 32 percent. The actual gravimetric air-fuel ratio in the furnace iscalculated to be 12 kg air/kg fuel. The heating value of the coal is 28,000 kJ/kg. Determine(a) the amount of coal consumed during a 24-hour period and (b) the rate of air flowingthrough the furnace.

Given : Wnet = 1.878x1012 kwh efficiency η = 34%

Q3/In 2001, the United States produced 51 percent of its electricity in the amount of 1.878 * 1012 kWh from coalfired power plants. Taking the average thermal efficiency to be 34 percent, determine the amount of thermal energy rejected by the coal-fired power plants in the United States that year.

Q3/In 2001, the United States produced 51 percent of its electricity in the amount of 1.878 * 1012 kWh from coalfired power plants. Taking the average thermal efficiency to be 34 percent, determine the amount of thermal energy rejected by the coal-fired power plants in the United States that year.

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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Concept explainers

Electrical Power Generation

In an electric power generator, one type of energy is converted into electrical energy. Power-generating systems are simply a combination of potential or stored energy that is converted to provide kinetic energy, which, in turn, generates electrical energy for use in engines, lighting, heating, and other benefits of modern life.

Question

Q3/In 2001, the United States produced 51 percent of its electricity in the amount of 1.878
* 1012 kWh from coalfired power plants. Taking the average thermal efficiency to be 34
percent, determine the amount of thermal energy rejected by the coal-fired power plants in
the United States that year.
Q4 / A coal-burning steam power plant produces a net power of 300 MW with an overall
thermal efficiency of 32 percent. The actual gravimetric air-fuel ratio in the furnace is
calculated to be 12 kg air/kg fuel. The heating value of the coal is 28,000 kJ/kg. Determine
(a) the amount of coal consumed during a 24-hour period and (b) the rate of air flowing
through the furnace.

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