Cooling solutions from Low Grade Waste heat recovery (Vapour Absorption Machine)

A vapour absorption chiller (VAM) is a machine to produce chilled water using heat sources such as steam, hot water, and gas. A fluid pair of lithium bromide and water are used in commercial VAM. The refrigerant used is actually water, as that is the working medium that experiences a phase change and causes the cooling effect. The second fluid that drives the process is salt, generally lithium bromide. Heat is used to separate the two fluids, when they are mixed in a near vacuum environment.