Condensation (phase transition)

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The four major phases of matter.

Condensation is a process in which the vapor phase of a substance is changed into the liquid phase by removing and transferring heat from the vapor to a cooling medium.[1][2] For the process to take place, the vapor must be saturated and the heat of vaporization must be removed from the vapor.[3]

The condensation of vapors, like the boiling of liquids, plays a very significant role in a great many commercial and industrial processes.


[edit] Types of condensation

There are several types of condensation:

[edit] Applications

For more information, see: Continuous distillation, Vapor-compression refrigeration, and Surface condenser.

Distillation: Condensation is an important component of all distillation processes in large scale industrial distillation systems such as those in chemical plants, petroleum refineries, petrochemical plants, natural gas processing and alcohol distilleries. It is an equally important component of the small scale distillation equipment used in chemical laboratories.

Refrigeration: The condensation process is also an important integral part of almost all residential, commercial and industrial refrigeration systems.

Electric power plants: Most thermal power plants have large condensers, known as surface condensers, to condense the exhaust steam from their steam turbines.

[edit] Sublimation and deposition

Although condensation is sometimes defined so as to include the vapor phase of a substance being changed into the solid phase, that process is more correctly referred to as deposition . The opposite process, namely changing from a solid phase into a vapor phase, is referred to as sublimation. Neither deposition or sublimation are discussed in this article.

[edit] References

  1. Eduardo Cao (2009). Heat Transfer in Process Engineering, 1st Edition. McGraw-Hill. ISBN 0-07-162408-2. 
  2. G.S. Sawhney (2008). Heat and Mass Transfer. I.K. International Publishing House. ISBN 81-906942-7-8. 
  3. For a saturated liquid to boil, the heat of vaporization must be absorbed into the liquid. For a saturated vapor to condense, the latent heat of vaporization must be released from the vapor. When released by a condensing vapor, the heat of vaporization is sometimes referred to as the heat of condensation.
  4. 4.0 4.1 Satish G. Kandlikar. Masahiro Shoji and V.K. Dhir (Editors) (1999). Handbook of Phase Change: Boiling and Condensation, 1st Edition. CRC Press. ISBN 1-56032-634-4. 
  5. Donald R. Pitts and Leighton E. Sissom (1998). Schaum's Outline of Theory and Problems of Heat Transfer, 2nd Edition. McGraw-Hill. ISBN 0-07-050207-2. 
  6. Robert G. Fleagle and Joost A. Businger (1980). An Introduction to Atmospheric Physics, 2nd Edition. Academic Press. ISBN 0-12-260355-9. 
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