Mechanical Engineering - Heat Transfer, Refrigeration and Air Conditioning - Discussion

29. 

For ammonia refrigerating systems, the tubes of a shell and tube condenser are made of

[A]. copper
[B]. aluminium
[C]. steel
[D]. brass

Answer: Option C

Explanation:

No answer description available for this question.

Atul said: (Aug 6, 2014)  
Ammonia reacts with copper so we use steel or wrought iron in place of copper.

Rahul Patil said: (Sep 9, 2015)  
Steel having high thermal conductivity than other material.

Harsh Patel said: (Sep 15, 2015)  
@Rahul patil.

Steel not having high thermal conductivity than aluminium.

Suthi said: (Jul 8, 2016)  
Yes of course steel is used since because. Ammonia, especially in the presence of moisture, reacts with and corrodes copper, zinc, and many alloys. Therefore only iron, steel, certain rubbers and plastics, and specific nonferrous alloys resistant to ammonia.

Debashis said: (Apr 5, 2018)  
For ammonia absorption plant, pipe made of cast steel or wrought iron or forgings.

Alok Singh said: (Jan 9, 2019)  
Copper and brass react with ammonia so that steel or wrought iton is used for this.

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