Flooded water chiller with hot gas supply for agitation

[Segei]

Does anybody have experience to work with flooded water chillers which use hot gas for ammonia agitation?

[RANGER1]

Do you mean like a majonier with injector ?

[US Iceman]

I have used hot gas bypass on chillers to prevent freeze-up or operation at very low loads, but agitation? What are you trying to accomplish Segei?

[subb-zero]

Thats cool hot gas agitation?

[subb-zero]

whats going to happen with dicharge pressure of those compressors?

[Segei]

I heard that this hot gas use to improve heat transfer and manufacturer require certain minimum hot gas pressure. It can be barrier to lower condensing pressure. I believe that boiling ammonia has very good heat transfer coefficient and it doesn't require agitation. So I'm puzzled as well.

[US Iceman]

Well... the only thing I can think of right now is someone is trying to convince themselves that injecting hot gas into the liquid in a flooded chiller will promote nucleate boiling instead of pool boiling. This might be an attempt to improve load load performance???

The downside is that even though the hot gas will be cooled down to the saturation temperature in the chiller the extra gas still has to be compressed and that costs energy.