Browse Prior Art Database

HYBRID TURBINE

IP.com Disclosure Number: IPCOM000199452D
Publication Date: 2010-Sep-04
Document File: 6 page(s) / 136K

Publishing Venue

The IP.com Prior Art Database

Abstract

A technique for generation of electricity and heat by utilizing a hybrid turbine is disclosed. This technique proposes conversion of fossil fuels, such as coal, oil, or natural gas, to a high pressure. The fossil fuels are combusted with very pure oxygen flow and are water cooled. High pressure high temperature (HPHT) steam is passed through the hybrid turbine to generate electric power and condense the exhaust flow to generate water.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 54% of the total text.

Page 1 of 6

RP13499

BRIEF ABSTRACT

    A technique for generation of electricity and heat by utilizing a hybrid turbine is disclosed. This technique proposes conversion of fossil fuels, such as coal, oil, or natural gas, to a high pressure. The fossil fuels are combusted with very pure oxygen flow and are water cooled. High pressure high temperature (HPHT) steam is passed through the hybrid turbine to generate electric power and condense the exhaust flow to generate water.

KEYWORDS

    Polygeneration, hybrid turbine, combustor, fossil fuels, Heat Recovery Steam Generator (HRSG), combined cycle (CC), integrated gasification combined cycle (IGCC) , gasifier.

DETAILED DESCRIPTION

    Currently most large scale electrical energy production depends on the use of turbines. Most of the world's power that is supplied to large utility grids is produced by turbines. Some examples of turbines are steam turbines used at coal-burning electricity plants; liquid water turbines used at hydro-electric plants, gas turbines that combust fuels such as natural gas or diesel fuel. Turbines are versatile and may be used in a number of applications. The use of a power generation system to simultaneously generate both electricity and useful heat is called poly generation.

    Conventionally, a Heat Recovery Steam Generator (HRSG) may be used as an energy recovery heat exchanger that recovers heat from a hot gas stream.

1

HYBRID TURBINE

Page 2 of 6

RP13499

HRSG produces steam that can be used to drive a steam turbine, for example. However certain expenses and efficiency losses occur when the HRSG is used in a combined cycle (CC) embodiment.

    Therefore, there is a need in the art for an energy generation system which is efficient as well as cost effective.

    The present disclosure relates to a hybrid turbine which is a hybrid of a gas turbine and a steam turbine. In one embodiment, a combustion steam turbine uses hydrogen and oxygen flowing through combustors to generate high pressure high temperature (HPHT) steam. Water is directly mixed in the turbine to cool the combustor as a substitute for the conventional heat exchanger (HRSG). Further, steam may be generated directly, or a condenser may be used to generate liquid water.

    Figure 1 illustrates one embodiment wherein pure hydrogen (H2) and oxygen (O2) are fed to the combustor in a slightly fuel rich manner to keep an inducing environment for a turbine blade and a condenser. Combustion at high pressure generates steam. The H2 and O2 may be pressurized by the compressor or from other processes such as integrated gasification combined cycle (IGCC) gasifier or ai...