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


In aqua-ammonia and Lithium-bromide water absorption refrigeration systems, the refrigerants are respectively

[A]. water and water
[B]. water and lithium bromide
[C]. ammonia and lithium bromide
[D]. ammonia and water

Answer: Option D


No answer description available for this question.

Arjun said: (Apr 27, 2015)  
In aqua-ammonia absorption refrigeration system water is absorbent, so ammonia circulate in evaporator. In lithium-bromide water absorption refrigeration systems lithium-bromide is absorbent, so water is circulate in evaporator.

Kiran said: (Jan 10, 2016)  
So why not we select option B.

I think that, this question has two answer B & D.

Haris Khalid said: (Jan 4, 2017)  
I think the correct answer should be C because in vapour absorption cycle ammonia act as a refrigerator while water as an absorber, you can use either ammonia or lithium bromide as a refrigerator water will remain absorber in either case.

Narpat Patel said: (Mar 11, 2017)  
In Aqua->ammobia ref system = ammonia is used as refrigerant & water as Absorbent.


In Lithium->Bromide ref system = water is used as refrigerant and lithium bromide as an absorbent.

And this is the correct and final answer, so don't be get confused. D is the correct answer.

Pankaj said: (Jan 10, 2018)  
Answer is correct, li, br is exothermic.

Naresh said: (Feb 7, 2019)  
D is correct. I agree.

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