GAS-TURBINE POWER PLANT WITH HEAT RECUPERATION Russian patent published in 2012 - IPC F02C7/10 

FIELD: power engineering.

SUBSTANCE: gas-turbine power plant with heat recuperation comprises a heat-turbine unit, including an axisymmetric ring input device, a centrifugal compressor with a radial output diffuser changing into an axisymmetric exhausting vertical air duct, a circular combustion chamber with vertical and horizontal supply air ducts, an axial turbine with an outlet towards the compressor and an exhausting gas duct, a ring recuperator placed in an axial space between a compressor and an axial turbine, being coaxially arranged with a compressor's shaft, a power reducer built into a front wall of the input device and an outlet nozzle. The recuperator body is made in the form of an axisymmetric hollow circular drum, inside of which there is a tubular gas and air heat exchanger, comprising axisymmetric circular inlet and outlet tube plates with rows of helical heat exchange tubes. The inlet tube plate is a side front side of a drum body and simultaneously a lateral rear side of a vertical air duct exhausting from the compressor. The outlet tube plate is located on a vertical part of a supply air duct into a combustion chamber and simultaneously is its front lateral side. The inner part of the drum cavity is an extension of an exhausting gas duct along working medium flow communicated with a turbine outlet and via a circular axisymmetric channel formed by an external upper side of a vertical part of a supply air duct into a combustion chamber and an inner upper side of the drum body it communicates with the inner cavity of a gas exhaust channel to an exhaust nozzle. A gas exhaust channel into an exhaust nozzle comprises two vertical and one horizontal sections. The first vertical section along working medium flow is formed by a rear lateral side of a vertical supply air duct into a combustion chamber and a rear lateral side of the drum body. The horizontal section is formed by an external side of a vertical supply air duct wall into a combustion chamber and an internal side of a horizontal part of a gas exhaust channel body wall. The second vertical section along with working medium flow is displaced off the axis towards the exhaust nozzle, comprises front and rear vertical walls. The rear wall with its lower side is fixed on a combustion chamber body.

EFFECT: reduced dimensions, simplified design, improved reliability of operation and cost reduction.

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