The Development of the Hybrid Vaporization and Power Generation System for the Gas Turbine Using LNG Cold

We have been developing a hybrid LNG vaporization and power generation system which generates approximately −100°C air and natural gas fuel of a steady heating value since March 2004. In this study, three types of intake-cooling process for the Gas Turbine Combined Cycle (GTCC) ranging from several MW to several hundred MW are reviewed. • Cold air is directly introduced as gas turbine intake air and cooled down to approximately 10°C. • Cold air is compressed to about 5 bars and injected into the middle stage of the compressor as an inter-cool medium. • Cold air is compressed, recuperated and injected into the combustor as a power augmentation medium. In this paper, we describe an outline of the test equipment, configurations of the hybrid vaporization and power generation system for the gas turbine and discuss the possibilities based on exergy analysis for the above three cases.

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Development of a Low-NOx LBG Combustor for Coal Gasification Combined Cycle Power Generation Systems

Volume 4: Heat Transfer; Electric Power; Industrial and Cogeneration ◽

10.1115/89-gt-104 ◽

1989 ◽

Author(s):

M. Sato ◽

T. Abe ◽

T. Ninomiya ◽

T. Nakata ◽

T. Yoshine ◽

...

Keyword(s):

Power Generation ◽

Gas Turbine ◽

Gas Turbines ◽

Coal Gasification ◽

Combined Cycle ◽

Generation System ◽

Combustion Technology ◽

Power Generation System ◽

Combustion Tests ◽

Power Generation Systems

From the view point of future coal utilization technology for the thermal power generation systems, the coal gasification combined cycle system has drawn special interest recently. In the coal gasification combined cycle power generation system, it is necessary to develop a high temperature gas turbine combustor using a low-BTU gas (LBG) which has high thermal efficiency and low emissions. In Japan a development program of the coal gasification combined cycle power generation system has started in 1985 by the national government and Japanese electric companies. In this program, 1300°C class gas turbines will be developed. If the fuel gas cleaning system is a hot type, the coal gaseous fuel to be supplied to gas turbines will contain ammonia. Ammonia will be converted to nitric oxides in the combustion process in gas turbines. Therefore, low fuel-NOx combustion technology will be one of the most important research subjects. This paper describes low fuel-NOx combustion technology for 1300°C class gas turbine combustors using coal gaseous low-BTU fuel as well as combustion characteristics and carbon monoxide emission characteristics. Combustion tests were conducted using a full-scale combustor used for the 150 MW gas turbine at the atmospheric pressure. Furthermore, high pressure combustion tests were conducted using a half-scale combustor used for the 1 50 MW gas turbine.

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Proposal of Innovative Gas Turbine Combined Cycle Power Generation System

Volume 7: Turbo Expo 2004 ◽

10.1115/gt2004-54177 ◽

2004 ◽

Author(s):

Hideto Moritsuka

Keyword(s):

Power Generation ◽

Gas Turbine ◽

Thermal Efficiency ◽

Pressure Ratio ◽

Combined Cycle ◽

Inlet Temperature ◽

Generation System ◽

Turbine Inlet Temperature ◽

Turbine Inlet ◽

Power Generation System

In order to estimate the possibility to improve thermal efficiency of power generation use gas turbine combined cycle power generation system, benefits of employing the advanced gas turbine technologies proposed here have been made clear based on the recently developed 1500C-class steam cooling gas turbine and 1300C-class reheat cycle gas turbine combined cycle power generation systems. In addition, methane reforming cooling method and NO reducing catalytic reheater are proposed. Based on these findings, the Maximized efficiency Optimized Reheat cycle Innovative Gas Turbine Combined cycle (MORITC) Power Generation System with the most effective combination of advanced technologies and the new devices have been proposed. In case of the proposed reheat cycle gas turbine with pressure ratio being 55, the high pressure turbine inlet temperature being 1700C, the low pressure turbine inlet temperature being 800C, combined with the ultra super critical pressure, double reheat type heat recovery Rankine cycle, the thermal efficiency of combined cycle are expected approximately 66.7% (LHV, generator end).

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Use of Low/Mid-Temperature Solar Heat for Thermochemical Upgrading of Energy, Part II: A Novel Zero-Emissions Design (ZE-SOLRGT) of the Solar Chemically-Recuperated Gas-Turbine Power Generation System (SOLRGT) guided by its Exergy Analysis

Journal of Engineering for Gas Turbines and Power ◽

10.1115/1.4006086 ◽

2012 ◽

Vol 134 (7) ◽

Cited By ~ 8

Author(s):

Na Zhang ◽

Noam Lior ◽

Chending Luo

Keyword(s):

Power Generation ◽

Water Vapor ◽

Gas Turbine ◽

Co2 Capture ◽

Exergy Analysis ◽

Efficiency Improvement ◽

Generation System ◽

Solar Heat ◽

Energy Part ◽

Power Generation System

This paper adds an exergy analysis of the novel SOLRGT solar-assisted power generation system proposed and described in detail in Part I of this study (Zhang and Lior, 2012, “Use of Low/Mid-Temperature Solar Heat for Thermochemical Upgrading of Energy, Part I: Application to a Novel Chemically-Recuperated Gas-Turbine Power Generation (SOLRGT) System,” ASME J. Eng. Gas Turbines Power, Accepted. SOLRGT is an intercooled chemically recuperated gas turbine cycle, in which solar thermal energy collected at about 220 °C is first transformed into the latent heat of water vapor supplied to a reformer, and then via the reforming reactions to the produced syngas chemical exergy. This integration of this concept of indirect thermochemical upgrading of low/mid temperature solar heat has resulted in a high efficiency novel hybrid power generation system. In Part I it was shown that the solar-driven steam production helps improve both the chemical and thermal recuperation in the system, with both processes contributing to the overall efficiency improvement of about 5.6%-points above that of a comparable intercooled CRGT system without solar assist, and nearly 20% reduction of CO2 emissions. An economic analysis of SOLRGT predicted that the generated electricity cost by the system is about 0.06 $/kWh, and the payback period about 10.7 years (including two years of construction). The exergy analysis of SOLRGT in this (Part II) paper identified that the main potentials for efficiency improvement is in the combustion, the turbine and compressors, and in the flue gas due to its large water vapor content. Guided by this, an improved solar-assisted zero-emissions power generation system configuration with oxy-fuel combustion and CO2 capture, ZE-SOLRGT, is hereby proposed, in which the exergy losses associated with combustion and heat dumping to the environment are reduced significantly. The analysis predicts that this novel system with an 18% solar heat input share has a thermal efficiency of 50.7% and exergy efficiency of 53%, with ∼100% CO2 capture.

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