INSTALLATION WITH TURBOEXPANDER AND DRIVE TURBOMACHINE Russian patent published in 2018 - IPC F01D17/16 

FIELD: engines and pumps.

SUBSTANCE: invention relates to installations comprising turboexpanders and drive turbomachines, as well as to methods for such installations’ controlling. Installation with the turboexpander and the drive turbomachine comprises a turboexpander designed to expand the first fluid and comprising an expansion stage with one impeller, first row of moving input guide vanes located at the input to said expansion stage, drive turbomachine configured with possibility to process a second fluid and comprising an impeller, second row of movable input guide vanes located at the input of the impeller of the turbomachine, mechanical transmission located between the turboexpander and the drive turbomachine and a controller coupled to a second row of movable guide vanes and configured with possibility to control a second row of movable blades for controlling the rotation speed of said drive turbomachine and said turboexpander. Controller is configured with possibility to receive data on the specified rotation speed and controlling the second row of moving blades to control the rotational speed to the desired value. Plant control method comprises a turboexpander, a mechanically driven turbomachine driven by a turboexpander. Also comprises first row of moving input guide vanes located at the turboexpander input, and a second row of movable input guide vanes located at the drive turbomachine. Method comprises the following steps: expanding the first fluid in a turboexpander and generating mechanical energy therefrom; provision of the drive turbomachine rotation with the help of mechanical energy, produced by turboexpander; processing of the second fluid; control of the second row of movable input guide vanes for control over the rotation speed of the drive turbomachine and a turboexpander and controlling a second row of moving blades to maintain a rotational speed within a near constant value range.

EFFECT: technical result consists in enabling of plant’s efficiency.

17 cl, 5 dwg