boiler

1. Boilers
Presented by: WAQAS CH
Objective: To describe and explain the boilers’
functions and the two main types of boilers.

2. What is a boiler?
 A water containing vessel in which water is
heated under pressure
 Transfer heat from afuel source(oil, gas, coal)
into steam
 Thesteam or hot fluid circulatesout of the
boiler for usein variousprocessor heating
appliances.

3. How does a boiler work?
 Closed system: when 100% of thesteam
produced isreturned to bereused.
 Examplesof closed systemsareclosesteam
heating, hot water heating, and “one-pipe”
systems.
 Open system: asystem that doesnot return the
condensate.

5. Fire Tube Boilers
• Thecombustion gasespassinsideboiler
tubes, and heat istransferred to water on the
shell side.

6. Water Tube Boilers
• Boiler water passes
through thetubes
whiletheexhaust
gasesremain in the
shell side, passing
over thetube
surfaces.

7. Conclusion
 Boilersareclassified into firetubeor water
tubeboilersdepending on whether theheat
sourceisinsideor outsidethetubes.
 Thegoal in both casesisto maximizetheheat
transfer between thewater and thehot gases
heating it.

8. References
 Energy Solution Center Inc.
http://www.energysolutionscenter.org/Boiler
Burner/
 Alkan Murray Corp.
http://www.alkenmurray.com/Boilerworks.ht
ml