heat temperature require to generate ammonia refrigeration 1

[solcool]

what is the heat temperature requir to generate the ammonia refregiration cooling system to work, like the one that work on propane.
Joe

 

[mbeychok]

solcool:

It is very difficult to understand what you are asking. Please try to explain what youw want more clearly.

If you are talking about conventional, vapor compression refrigeration using ammonia, you may find it useful to read

http://en.wikipedia.org/wiki/Vapor_compression_refrigeration

Milton Beychok
(Visit me at www.air-dispersion.com)
.

 

[Whoops]

I think he means ammonia absorption refrigeration, in which the ammonia is regenerated by heat, a propane flame in caravan fridges.

http://en.wikipedia.org/wiki/Absorption_refrigeration

I think it's about 120 degC, but I'm sure someone who knows about it will be along shortly with the right figures.

 

[sterl]

As a quick answer: It will work where generator temperatures are greater than ambient (WB, if evap cooling is employed) by any amount greater than the difference between Ambient DB and the refrigeration Evaporating Temperature....

That is a quick calc and will leave some portion of the system working at a subatmospheric pressure, which of course leads to some terrible heat transfer conditions, thus a very large condensing heat exchanger, if the heat rejection for the "weak" vapor is to the ambient.

The "weak" condenser will obviously be at positive pressure for PP-Equivalent condensing above 100 Deg. C.

With a lot of waste heat and a ready source of cooling water, they can be made to work at 130 Deg. C. waste heat temperature.

Economical? Scale will be a very large player in one designed for 130 Heat Source, and its still not going to be a very flexible system, would need a lot of controls.

 

[stanlsimon]

If you want some empirical data look at the Yazaki web site, look under hot water fired chillers. It will give you a range of incoming water temperatures for the chilled water loop, the heat rejection loop, and the heat input loop.