The working principle of the Triogen ORC is presented below.
I => II
The pre-feed pump is used to pump the working fluid from the storage vessel to the main pump. The liquid enters the main pump at a pressure of approximately 4 bar.
II => III
Main pump, in HTG
The main pump brings the pressure of the working fluid, depending on the rotation speed of the turbine, up to a working pressure of approximately 30 bar.
III => IV
In the recuperator the working fluid is preheated by the vapour leaving the turbine.