Working Principle:

• The boiling point of the water is a function of pressure. At atmospheric pressure, water boils at 100 deg. C. When maintained at a high vacuum, water will boil and subcool itself. The boiling point of water at 6 mmHg (abs) is 3.7 deg. C.
• Lithium Bromide (LiBr) has the property to absorb water due to its chemical affinity. At higher concentrations and lower temperatures, LiBr absorbs water vapour (refrigerant vapour) very effectively.
• As Lithium Bromide becomes dilute, it loses its capacity to absorb water vapour. It thus needs to be reconcentrated using a heat source. A heat source may be Steam or Flue gases or even Hot water.
• The heating causes the solution to release the absorbed refrigerant in the form of vapour. This vapour is cooled in a separate chamber to become liquid refrigerant.

Advantages:

• Not Depending on Electricity – VAPOUR ABSORPTION MACHINES OPERATE ON STEAM, CHEAP RAW FUELS, HOT WATER OR COMBUSTION FLUE GASES AS ITS SOURCE OF HENCE SIGNIFICANT SAVINGS IN TERMS OF OPERATING COST.
• No moving Parts: VAPOUR ABSORPTION MACHINE DOES NOT USE BIG COMPRESSOR OR MOTOR FOR ITS OPERATING VERY SILENT DURING OPERATION AND NO VIBRATION.
• Automatic and Stepless Modulation: VAPOUR ABSORPTION CHILLERS HANDLE FLUCTUATING LOAD FROM 10%-100% IN STEPLESS MODE
• EFFICIENT PART LOAD PERFORMANCE: VAPOUR ABSORPTION CHILLERS DELIVER THE SAME EFFICIENCY IN PART LOAD. YOU SPEND ONLY WHAT YOU USE.