Why ammonia refrigeration system !

[Hassanakhlaq]

Why ammonia refrigeration is preferred over conventional refrigeration when it comes to industrial scale. Also i have seen ammonia refrigeration has been used for central A/C system in a commercial building.Is there any reason other than ammonia is cheaper and it is environment friendly and does not cause the kind of damages that fluoro carbons do.

 

[gerhardl]

No.

Apart from that this also do maintenance and parts cost cheaper.

 

[TBP]

If I remember correctly, it takes FAR less energy to compress & condense ammonia over any other refrigerant.

 

[MikeHalloran]

The iron piping that's required is of no value to copper thieves.



Mike Halloran
Pembroke Pines, FL, USA

 

[hacksaw]

Ammonia was one of the first refrigeration systems used and is very effective, but it requires a cooling tower with a rather high condensing temperature.

It was a common home refrigerent in 1950's and was used until the freons became available. Copper piping is permissible.

Today it is most often found in industrial and commercial systems.

The principle hazards is that it is a flammable gas.

 

[TBP]

Copper piping is permissible with freon, but I've seen what ammonia does to yellow metal - eats it alive.

One thing about ammonia, nobody has to "wonder if there's a leak".

 

[unclesyd]

Ammonia is also an asphyxiant along with it's property of paralysing the lungs so you can breathe, it takes your breath away bitterly.

Good things.

Ammonia leaks are easier to find that freon leaks.

It is a lot cheaper than freon.

There is only one grade no cross contamination.

No harmful by products after running for years.

An ice house condenser is very simple and last forever.

It doesn't take a specialist with special equipment to work on the ammonia equipment.

 

[jmw]

I'm just wondering where the ice slurry cooling system research has reached... any ideas?

JMW

http://www.ViscoAnalyser.com

 

[JakeAdkins]

One of my professors told me that ammonia is a superior refrigerant because of the reasons listed above, but because of small leaks that early systems were prone to they switched because of the smell.

 

[Apakrat]

With modern available technology and off the shelf equipment, an inferior hazardous cooling/refrigeration system using NH[sub]3[/sub] Ammonia would be a system using N[sub]2[/sub] Nitrogen--------


At 74th year working on IR-One PhD from UHK - - -

 

[waross]

There was a commercial blast freezer in Vancouver Canada used in the seafood industry.
The refrigerant was about 78% N[sub]2[/sub] (ambient air off the street.
A blower forced the air through a series of heat exchangers and turbo expanders (or turbo chargers). Air temperatures close to minus 100 degrees Fahrenheit were developed.
I was on a project where I was living and working with some of the operators from that system. They remembered it as prone to "crashing" and very expensive to run. And this was in the years when electricity was considered "cheap" energy.
The operators commented that the turbo-chargers on my Cummins Gen-sets looked like the turbos used in the N[sub]2[/sub] refrigeration system.
Yes, you can refrigerate with N[sub]2[/sub] with off the shelf components.
Yes it has been done.
Yes the contribution to green house gas emissions by leaked refrigerant is nil.
No it may never be done again.
And there are constant loss systems using liquid N[sub]2[/sub].

Bill
--------------------
"Why not the best?"
Jimmy Carter