Solutions for Combustion Engineering 3rd Edition by Kenneth Bryden (All Chapters included)
5 keer bekeken 0 keer verkocht
Vak
Combustion Engineering 3rd Edition Bryden
Instelling
Combustion Engineering 3rd Edition Bryden
Complete Solutions Manual for Combustion Engineering 3rd Edition by Kenneth Bryden; Kenneth W. Ragland; Song-Charng Kong ; ISBN13: 9781138065383.....(Full Chapters included)...1. Introduction to Combustion Engineering.
2. Fuels.
3. Thermodynamics of Combustion.
4. Chemical Kinetics of Combusti...
Kenneth M. Bryden
Iowa State University
Kenneth W. Ragland
University of Wisconsin – Madison
Song-Charng Kong
Texas Tech University
** Immediate Download
** Swift Response
** All Chapters included
, 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
, 2-3
2. In the United States energy for household heating is generally sold using English units, e.g., therm, gal,
and cord. A house in Wisconsin requires 1200 therms of thermal energy during the heating season.
Calculate the cost of fuel if the furnace uses (a) natural gas with an efficiency of 70%; (b) No. 2 fuel
oil, efficiency 65%; (c) kerosene, efficiency 99.9% (unvented); and (d) wood with l5% moisture with
an efficiency of 50%. Use the data in Tables 2.2, 2.7, and 2.13. The efficiencies are based on the HHV.
Assume the cost of natural gas is $8/MBtu, the cost of No. 2 fuel oil is $3/gal, the cost of kerosene is
$3.50/gal, and the cost of wood is $100/cord. Assume the bulk density of cord wood is 30 lbm/ft3.
Given: Qheat = 1200 therm/yr
Fuel Fuel cost Thermal efficiency
Natural Gas $8.00/MBtu 70%
No. 2 Fuel Oil $3.00/gal 65%
Kerosene $3.50/gal 99.9%
Wood (15% MC as-recd) $100/cord 50%
Find: Annual fuel costs
Solution:
Natural gas
1200 Therm heat Therm in 0.1 MBtu
Qin = × × = 171.4 MBtu yr
yr 0.70 Therm heat Therm in
171.4 MBtu $8
Annual cost ng = ×
yr MBtu
Annual cost ng = $1370 yr ⇐ (a)
Voordelen van het kopen van samenvattingen bij Stuvia op een rij:
Verzekerd van kwaliteit door reviews
Stuvia-klanten hebben meer dan 700.000 samenvattingen beoordeeld. Zo weet je zeker dat je de beste documenten koopt!
Snel en makkelijk kopen
Je betaalt supersnel en eenmalig met iDeal, creditcard of Stuvia-tegoed voor de samenvatting. Zonder lidmaatschap.
Focus op de essentie
Samenvattingen worden geschreven voor en door anderen. Daarom zijn de samenvattingen altijd betrouwbaar en actueel. Zo kom je snel tot de kern!
Veelgestelde vragen
Wat krijg ik als ik dit document koop?
Je krijgt een PDF, die direct beschikbaar is na je aankoop. Het gekochte document is altijd, overal en oneindig toegankelijk via je profiel.
Tevredenheidsgarantie: hoe werkt dat?
Onze tevredenheidsgarantie zorgt ervoor dat je altijd een studiedocument vindt dat goed bij je past. Je vult een formulier in en onze klantenservice regelt de rest.
Van wie koop ik deze samenvatting?
Stuvia is een marktplaats, je koop dit document dus niet van ons, maar van verkoper mizhouubcca. Stuvia faciliteert de betaling aan de verkoper.
Zit ik meteen vast aan een abonnement?
Nee, je koopt alleen deze samenvatting voor €28,81. Je zit daarna nergens aan vast.
