Which one of the following methods can be adopted to obtain isothermal compression in an air compressor?

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ESE Mechanical 2016 Paper 1: Official Paper
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  1. Increasing the weight of the compressor
  2. Interstage heating
  3. Atmospheric cooling
  4. Providing appropriate dimensions to the cylinder.

Answer (Detailed Solution Below)

Option 4 : Providing appropriate dimensions to the cylinder.
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Detailed Solution

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Explanation:

Isothermal compression in the air compressor requires minimum compression work.

F1 S.S Madhu 28.12.19 D14

The isothermal work is achieved by the intercooling between the stages of compression.

For isothermal compression, heat needs to be removed from the air during compression. This heat removal is done by either intercooler or increase in the surface area of the cylinder by choosing the appropriate dimensions i.e high dimension or fins.

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