SCREW EXPANDER AND UNIT FOR GENERATING ELECTRICITY FROM HEAT USING THE SCREW EXPANDER Russian patent published in 2022 - IPC F01C1/16 F01C20/12 

FIELD: power generation.

SUBSTANCE: group of inventions relates to a screw expander and to a unit for generating electricity from heat using the screw expander. Expander (10) comprises a body (12) with a chamber located therein; two screw rotors located in the chamber, wherein rotors said engage with each other by the screw contours thereof and interact with the wall surfaces, accordingly adjacent to and partially covering the rotors, so as to receive the supplied working medium through the high-pressure chamber located in the body (12) and to output said medium in the area of the low-pressure chamber located in the body (12); a generator driven by the screw rotors; at least one control slide valve; a control apparatus (218) configured to control the drive of the corresponding control slide valve in order to set a volume ratio suitable for expanding the working medium, formed from the final volume divided by the initial volume.

EFFECT: group of inventions is aimed at providing the possibility of adapting to various working conditions of the screw expander.

26 cl, 15 dwg