The Kalina Cycle® is the first major advance in power generation technology over the Rankine Cycle, invented by William Rankine of Scotland over 150 years ago. The Rankine cycle uses a pure component working fluid (e.g. water, Freon, etc.) in a high pressure boiler to generate vapor that is then used to drive a turbine that produces electricity. The vapor must then be condensed and pumped to a high pressure in order for the cycle to start over. The Kalina Cycle® utilizes an ammonia-water mixture, rather than a pure component, for the working fluid. The ammonia-water mixture boils and condenses over a temperature range and the ammonia-water mixture composition can be varied within the power cycle. These thermodynamic attributes can be used to create efficiency improvements in the power cycle by as much as 50 percent.
See on kalinacycle.net