R718 as refrigerant

[afeef]

dear sir
would you provide us with more detales
please send internet site of the company who produce this kind of chiller
regards
afeef

[frank]

Hi Lc_shi

have a look here http://www.refrigeration-engineer.co...ead.php?t=2619

[Argus]

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You are thinking of a Lithium Bromide / Water Absorption chiller. They've been around for most of the last century, and are still made. They tend to be very large capacity, and can capitalise on large quantities of waste heat.
By today's criteria they have a poor efficiency profile, because of thier high reliance on direct-fired carbon fuels, but still installed. Usually they are around 1 - 1. 5mW (3-4000TR).
I worked on a few in the 70s. The smallest one I ever commissioned was a Japanese Carrier 16JB that was considered a table-top model at 100 TR, (about 350 kW).
LiBro is the absorbent and water is the refrigerant. The system is kept at a vacuum to promote evaporation temperatures in the order of 5 Celsius.

The other variant of the absorption process is a slightly different technique; it uses water and ammonia. In this case the ammonia is the refrigerant and water is the absorbent.

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