Solutions for Physical Metallurgy Principles, 5th Edition by Abbaschian (All Chapters included)
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Course
Systems Engineering
Institution
Systems Engineering
Complete Solutions Manual for Combustion Engineering 3rd Edition by Kenneth Bryden; Kenneth W. Ragland; Song-Charng Kong ; ISBN13: 9781138065383....There is no solution for chapter 1...chapter 1: Introduction to Combustion Engineering
chapter 2: Fuels
chapter 3: Thermodynamics of Combustion
chap...
chapter 13: Detonation of Liquid and Gaseous Mixtures
chapter 14: Solid Fuel Combustion Mechanisms
chapter 15: Fixed Bed Combustion
chapter 16: Suspension Burning
chapter 17: Fluidized Bed Combustion
, 2-1
Chapter 2. Fuels
1. In the United States electricity is sold using the SI units of kilowatt (kW) or megawatt (MW), and fuel
for power generation stations is generally purchased using English units, e.g., British thermal unit (Btu),
gallon (gal), and ton (T). An industrial power plant has an average annual load of 100 MW (electrical).
If the overall thermal efficiency is 33% (based on HHV), what is the annual cost of fuel if the plant is
fired with (a) natural gas, (b) No. 2 fuel oil, and (c) bituminous coal? Use the data from Tables 2.2, 2.7,
and 2.13. Assume the cost of natural gas is $5/million Btu, the cost of No. 2 fuel oil is $3/gal, and the
cost of bituminous coal is $60/ton (1 ton = 2000 lbm).
Given: 100 MW electrical average annual output
η = 0.33
Fuel cost = $5/MBtu (natural gas)
Fuel cost = $3/gal (No. 2 fuel oil)
Fuel cost = $60/ton (bituminous coal)
Find: Annual fuel costs
Solution:
100 MW 8760 hr
Eelec = × = 876,000 MWh yr
1 yr
876,000 MWh elec MWh f 3412 MBtu
Qin = × × = 9.06 × 10 6 MBtu yr
yr 0.33 MWh elec MWh f
Natural gas
9.06 × 10 6 MBtu $5
Annual cost ng = ×
yr MBtu
Annual cost ng = $45.3 × 10 6 yr ⇐ (a)
, 2-2
No. 2 Fuel Oil
HHVNo2 = 45.4 MJ kg (Table 2.7)
ρNo2 = 0.865 (Table 2.7)
45, 400 kJ 1 Btu lb m MBtu ( 0.865 )10 3 kg 1 lb m ft 3 0.1337 ft 3
HHVNo2 = × × 6 × × ×
kg 2.324 kJ kg 10 Btu m3 16.02 kg m 3 gal
HHVNo2 = 0.1410 MBtu gal
$3 gal
Fuel cost No2 = × = $21.30 MBtu
gal 0.1410 MBtu
$60 ton lb m 10 6 Btu
Fuel cost coal = × × × = $2.14 MBtu
ton 2000 lb m 14,000 Btu MBtu
9.06 × 10 6 MBtu $2.14
Annual cost = ×
yr gal
Annual cost = $19.4 × 10 6 yr ⇐ (c)
Summary
Fuel Fuel cost Annual cost
Natural Gas $5.00/MBtu $45.3 million/yr
No. 2 Fuel Oil $21.30/MBtu $193 million/yr
Bituminous Coal $2.14/MBtu $19.4 million/yr
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