water freezing in absorption chiller

[jadidi]

What is the reason for water to freeze in evaporator in an absorption chiller where the pressure is higher than 4.6 mm.Hg .I think this must not occur even if the chilled water pump is off because the saturation temperature in this pressure is higher than 0 degree centigrade.

 

[pipesnpumps]

Li-Br lithium bromide, water spray or ammonia type? I would contact the chiller manufacturer

You can't vary the slow through absorption chillers very fast they are finicky. Are you pumping at constant volume? These are complex systems, ask the manufacturer.


Real world knowledge doesn't fall out of the sky on a parachute, but rather is gained in small increments during moments of panic or curiosity.

 

[jadidi]

Lithium bromide, water spray type.
It is a common belief that in these chillers the chilled water will not drop below 4 degrees.( See the answers to this question in HVAC/R forum.)
But if so, why there are freeze protecting controls on these machines?