Centrifugal compressors with integrated intercooling

US10731664B2 · kind B2 · utility

Assignee

• NUOVO PIGNONE TECNOLOGIE S.R.L. · IT

Inventors

• Giuseppe Iurisci · Firenze, IT
• Christian Aalburg · Bad Abbach, DE
• Giuseppe Sassanelli · Firenze, IT
• Luciano Mei · Firenze, IT
• Simon Schoewel · Garching bei München, DE
• Pawel Twarowski · Warszawa, PL
• Marek Watrobski · Warszawa, PL

Key dates

• Filing date: Aug 27, 2015
• Grant date: Aug 4, 2020
• Expiry date: Oct 15, 2036

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F01D25/08
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A compressor comprising: a casing; an upstream impeller and a downstream impeller for rotation in the casing; a diaphragm comprised of an internal portion and an external portion; an upstream diffuser fluidly coupled to an outlet of the upstream impeller; a return channel fluidly coupled to the upstream diffuser and to an inlet of the downstream impeller, the return channel has a plurality of return-channel blades connecting the internal and external diaphragm portions; and a downstream diffuser fluidly coupled to an outlet of the downstream impeller is disclosed. A first coolant passage is in the internal diaphragm portion and extends around an inner core, the first coolant passage being in heat-exchange relationship with the upstream diffuser and the return channel. A second coolant passage and third coolant passage are separated by a second inner core in the external diaphragm portion and in a heat-exchange relationship with the return channel and the downstream diffuser.