what is the principle of lithium bromide solution?

Answer 1

http://www.answers.com/topic/lithium

This will give you all the info you need, have fun

Answer 2

I think you are asking about a refrigeration system.
Lithium Bromide-based absorption refrigeration is a viable system capable of providing large-tonnage central air conditioning. Water is flash boiled under vacuum at low temperatures. This boiling action cools the refrigeration system's evaporator or chilled water coils. As the flashed water vapor accumulates inside the chiller, vacuum begins to drop off, i.e., the internal pressure starts climbing to normal. Lithium Bromide is added to absorb the water vapor, maintaining the vacuum condition.
Diluted Lithium Bromide cannot continue to absorb water beyond its saturation point and must be reconstituted with a heat source, such as steam or an oil- or gas-fired burner to perpetuate the cycle. Reconstituted Lithium Bromide is returned to absorb water once more, and the boiled-off water is returned to be flashed again. The cycle is then complete.

This thermodynamic cycle would be relatively simple were it not for the fact that Lithium Bromide, at 50% concentration, is highly corrosive to mild steel. The corrosion process inside absorbers corrodes and dissolves the chiller from the inside and creates all kinds of maintenance difficulties as the heat exchanger and flash boiling components become fouled with corrosion debris.

The only moving parts in an absorber are the various solution pumps, which circulate the fluids.