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Boilers. Presented by: Lisa Chang. Objective: To describe and explain the boilers’ functions and the two main types of boilers. What is a boiler?. A water containing vessel in which water is heated under pressure Transfer heat from a fuel source (oil, gas, coal) into steam

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Presentation Transcript
boilers

Boilers

Presented by: Lisa Chang

Objective: To describe and explain the boilers’ functions and the two main types of boilers.

what is a boiler
What is a boiler?
  • A water containing vessel in which water is heated under pressure
  • Transfer heat from a fuel source (oil, gas, coal) into steam
  • The steam or hot fluid circulates out of the boiler for use in various process or heating appliances.
how does a boiler work
How does a boiler work?
  • Closed system: when 100% of the steam produced is returned to be reused.
  • Examples of closed systems are close steam heating, hot water heating, and “one-pipe” systems.
  • Open system: a system that does not return the condensate.
fire tube boilers
Fire Tube Boilers
  • The combustion gases pass inside boiler tubes, and heat is transferred to water on the shell side.
water tube boilers
Water Tube Boilers
  • Boiler water passes through the tubes while the exhaust gases remain in the shell side, passing over the tube surfaces.
conclusion
Conclusion
  • Boilers are classified into fire tube or water tube boilers depending on whether the heat source is inside or outside the tubes.
  • The goal in both cases is to maximize the heat transfer between the water and the hot gases heating it.
references
References
  • Energy Solution Center Inc. http://www.energysolutionscenter.org/BoilerBurner/
  • Alkan Murray Corp. http://www.alkenmurray.com/Boilerworks.html
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