Absorption Refrigeration - aqua-ammonia 4

[Nielse]

In an Aqua-Ammonia solution, what factors effect the absorption rate of the ammonia into the water. ??? What would be the saturation point. ???

 

[dcasto]

Are you looking for a book or something? The answer is it is and equalibrium and kenetics problem and you need lots more data to get an answer to such a question.

 

[StoneCold]

dcasto is right that you need a lot more info to solve a specific problem. In general the solubility of gases in liquids is inversely related to the temperature and directly related to the partial pressure of the gas.

Regards
StoneCold

 

[25362]

If you are interested in the details, reading the chapter on refrigeration systems in Ludwig's Applied Process Design for Chemical and Petrochemical Plants, Volume 3, GULF, may be helpful.

 

[vpl]

Nielse

In looking back at your previous posts, it seems this is the fourth time you have asked a variation on this question, with most of the others basically telling you that you needed more information.

To be blunt: do you have the background and education to actually do what you're attempting? No amount of advice on here will substitute for an engineering education.


Patricia Lougheed

Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of the Eng-Tips Forums.

 

[TXiceman]

There are not too many companies or engineers around the world that are versed in ammonia absorption refrigeration. You will need the ammonia/water data and work your system from this.

I have done the calculations, but it was a long time back. Some of the process simulation programs should have the ability to work this out.

Ken

Ken
KE5DFR

 

[dcasto]

Ammonia Absorption Refrigeration in Industrial Processes by Marcel Bogart, Gulf Publishing

 

[Nielse]

An aging Design Engineer (mechanical) has found info on this subject very hard to come by on the net or in the land of Aus.

With the initial charge of Aqua-Ammonia being at 30 % NH3, we would assume that the ammonia lost from the fliud contained in the perculator return line, would intensfy the ammonia strength in the system fliud, or merely contribute to a substantial system pressure rise and hence a large partial pressure of ammonia.

Would re-absorption of the ammonia in the absorber still happen at strengths above 30% Nh3 ??