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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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