The Kalina cycle is essentially a modified Rankine cycle that utilizes the mixture of two different compounds as the working fluid: water and ammonia. The basic Rankine cycle does not utilize a mixture of two components; however, pure water is utilized.

What is the Kalina Cycle®? The Kalina Cycle® is a highly efficient power cycle that transforms heat into power, the Kalina Cycle® utilises an ammonia-water mixture as a working fluid to improve system efficiency and provide more flexibility in various operating conditions.

The working principle of the organic Rankine cycle is the same as that of the Rankine cycle: the working fluid is pumped to a boiler where it is evaporated, passed through an expansion device (turbine, screw, scroll, or other expander), and then through a condenser heat exchanger where it is finally re-condensed.

2.5 Disadvantages of Kalina Cycle 1) Ammonia is more corrosive compound to water so we use ammonia water mixture. 2) In HVRG the vapor fractions is generally higher then the heat transfer is to vapor so heat transfer coefficient is low so that needs large heat exchangers.