Which one of the following methods can be adopted to obtain isothermal

1.	Which one of the following methods can be adopted to obtain isothermal compression in an air compressor? (a) Increasing the weight of the compressor (b) Interstage heating (c) Atmospheric cooling (d) Providing appropriate dimensions to the cylinder
Answer» (c) Atmospheric cooling In reciprocating engine to achieve high pressure ratio the condition of minimum work is required which is possible in isothermal compression. To do isothermal compression intercooler is installed in between stages of compressor at outside of cylinder since intake is at atmospheric in general (except aircraft and all), so, temperature is at inlet is atmospheric. Since, process is isothermal so, intercooling will be isothermal atmospheric intercooling (the above is for ideal case not for real). By providing appropiate dimension to cylinder we can increase volumetric efficiency not achieve the isothermal cooling.

Which one of the following methods can be adopted to obtain isothermal compression in an air compressor? (a) Increasing the weight of the compressor (b) Interstage heating (c) Atmospheric cooling (d) Providing appropriate dimensions to the cylinder

Answer»

(c) Atmospheric cooling

In reciprocating engine to achieve high pressure ratio the condition of minimum work is required which is possible in isothermal compression. To do isothermal compression intercooler is installed in between stages of compressor at outside of cylinder since intake is at atmospheric in general (except aircraft and all), so, temperature is at inlet is atmospheric. Since, process is isothermal so, intercooling will be isothermal atmospheric intercooling (the above is for ideal case not for real).

By providing appropiate dimension to cylinder we can increase volumetric efficiency not achieve the isothermal cooling.

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