Mitsubishi Heavy Industries Limited

Other

Mitsubishi Jukogyo Kabushiki Kaisha

Yutaka Suzuki

Hidetaka Mori

Hideaki Sugishita

Kazuo Uematsu

Kazuharu Hirokawa

Ichiro Fukue

Eiji Akita

Shigemi Mandai

Sunao Aoki

Yoshiaki Tsukuda

Yasushi Fukuizumi

Kiichiro Ogawa

Hideo Matsuda

Herbert Jericha

Toru Takigawa

Pyong Sik Pak

Provided is turbine plant using methanol as fuel in which working fluid is compressed by compressor and led into combustor A mixture of H and CO as fuel added with O is burned to generate high temperature gas, which works at high temperature turbine flows through heat exchangers and returns partly to the compressor and enters partly low pressure turbine of bottoming system to work. Condensed water from condenser of the bottoming system is pressurized by pressure pump and flows through the heat exchangers to become high temperature steam and to work at high pressure turbine Exhaust gas thereof is mixed into the combustor A mixture of methanol and water is supplied into reformer to absorb heat from the heat exchanger to be reformed into H and CO , which is supplied into the combustor A high temperature portion of the high temperature turbine is cooled by cooling medium extracted from compressor outlet and high pressure turbine outlet thereby reliability of the high temperature turbine is enhanced.

Combined cycle power plant

A combined cycle power plant includes a combination of a gas turbine plant and steam turbine plant. The gas turbine cooling steam temperature is adjusted appropriately so that the gas turbine can be made of easily obtainable material. Steam supplied from the intermediate pressure evaporator is mixed into the cooling steam supply passage for supplying therethrough exhaust steam from the high pressure steam turbine into the gas turbine high temperature portion as cooling steam. Thus, cooling steam temperature is lowered without lowering of the entire efficiency, and material of less heat resistant ability becomes usable as material forming the gas turbine high temperature portion to be cooled. Thus, design and manufacture of the gas turbine may be satisfied by less expensive and easily obtainable material.

Combined cycle power plant and cooling steam supply method for gas turbine therein

Provided is turbine plant using methanol as fuel in which working fluid is compressed by compressor and led into combustor . A mixture of H and CO as fuel added with O is burned to generate high temperature gas, which works in high temperature turbine , flows through heat exchangers and returns partly to the compressor and enters partly low pressure turbine of a bottoming system to work. Condensed water from condenser of the bottoming system is pressurized by pressure pump and flows through the heat exchangers to become high temperature steam and to work in high pressure turbine . Exhaust gas thereof is mixed into the combustor . A mixture of methanol and water is supplied into reformer to absorb heat from the heat exchanger to be reformed into H and CO , which is supplied into the combustor . A high temperature portion of the high temperature turbine is cooled by cooling medium extracted from the compressor outlet and high pressure turbine outlet thereby reliability of the high temperature turbine is enhanced.

Gas turbine combined cycle system is improved to enhance gas turbine efficiency and combined efficiency by effecting steam-cooling of combustor tail tube and turbine blades. In the combined cycle system comprising; gas turbine ( ) having generator ( ), compressor ( ), combustor ( ), blade cooling air cooler ( ), fan ( ) and turbine ( ); steam turbine ( ) having high pressure turbine ( ), intermediate pressure turbine ( ) and low pressure turbine ( ); and waste heat recovery boiler ( ), saturated water of intermediate pressure economizer ( ) is partially led into fuel heater ( ) for heating fuel and the water cooled thereby is supplied to feed water heater ( ). Steam of intermediate pressure superheater ( ) is led into the combustor tail tube for cooling thereof and the steam is then supplied to inlet of the intermediate pressure turbine ( ). Steam of outlet of the high pressure turbine ( ) is led into the turbine ( ) for cooling blades thereof and the steam used for cooling stationary blades is supplied to the inlet of the intermediate pressure turbine ( ) and the steam used for cooling moving blades is supplied to reheater ( ). Thus, the efficiency is enhanced.

Gas turbine combined cycle system

A gas turbine system and a combined plant including the gas turbine system provides a higher effect in realizing a high plant efficiency and reduction of NOx generation. The gas turbine system includes a compressor ( ) for compressing combustion air, a combustor ( ) for burning fuel with the combustion air, and a gas turbine ( ) driven by high temperature gas generated at the combustor ( ). A portion of the exhaust gas discharged from the gas turbine ( ) is recirculated back into the combustor ( ). A combined plant can also include the gas turbine system.

Gas turbine system and combined plant comprising the same

Provided is turbine plant using methanol as fuel in which working fluid is compressed by compressor,and led into combustor,. A mixture of H,and CO,as fuel added with O,is burned to generate high temperature gas, which works at high temperature turbine,, flows through heat exchangers,and returns partly to the compressor,and enters partly low pressure turbine,of bottoming system to work. Condensed water from condenser,of the bottoming system is pressurized by pressure pump,and flows through the heat exchangers,to become high temperature steam and to work at high pressure turbine,. Exhaust gas thereof is mixed into the combustor,. A mixture of methanol and water is supplied into reformer,to absorb heat from the heat exchanger,to be reformed into H,and CO,, which is supplied into the combustor,. A high temperature portion of the high temperature turbine,is cooled by cooling medium extracted from compressor,outlet and high pressure turbine,outlet thereby reliability of the high temperature turbine,is enhanced.

Combined cycle power plant with fuel reformer

The invention provides a gas turbine combined cycle structured such that an intermediate cooling device for cooling a compression air discharged from a low pressure compressor, so as to reduce a load of a high pressure compressor, is provided. The gas turbine combined cycle in accordance with the invention is structured such as to branch water from a condenser to a steam generating device for generating steam. Exhaust gas discharged from a steam turbine is condensed to water. Compression air discharged from a low pressure compressor is cooled by being supplied to an intermediate cooling device, and is then supplied to a high pressure compressor. Steam which heats and operates the steam turbine is generated by the heat recovered by the cooling of the compression air in the intermediate cooling device. Accordingly, there can be obtained a gas turbine combined cycle having the advantage of the conventional intermediate cooling type gas turbine combined cycle, but exhibiting an improved combined efficiency.

Gas turbine combined cycle

Combined cycle power generating plant and method of supplying cooling steam for gas turbine in same

In a combined cycle power plant, exhaust from a high pressure turbine is branched so that part of it is supplied to a steam cooling system, and the other part of it is supplied to an inlet of a reheater of an exhaust heat recovery boiler. The exhaust supplied to the steam cooling system performs predetermined cooling and becomes heated. Then, the heated exhaust is guided from an outlet of the steam cooling system to an intermediate position of the reheater, merged with the exhaust supplied to the inlet of the reheater, and temperature-adjusted in the reheater. Then, the reheated, combined steam is supplied to a downstream turbine for heat recovery. Thus, a safe, reliable steam cooling system is achieved by effectively using a sufficient amount of high pressure turbine exhaust.

Combined cycle power plant with steam cooled gas turbine

In a hydrogen combustion turbine plant employing a topping bleed cycle, a low temperature hydrogen combustion turbine bleeds part of exhaust from a third turbine to cool a first turbine, thereby achieving a high efficiency in a desired temperature range while curtailing a cost increase without involving the addition of accessory instruments.

Low temperature hydrogen combustion turbine

A steam cooled gas turbine system in a combined power plant, constituted such that gas turbine blade cooling steam and combustor tail pipe cooling steam are bled from an outlet of a high pressure turbine, passed through a fuel heater for heat exchange with fuel, sprayed with water to be cooled to predetermined temperatures, and then supplied to cooling areas, whereby the cooling steam supply temperatures can be maintained at predetermined values during partial load operation as well as rated operating to achieve effective cooling.

Steam cooled gas turbine system

An exhaust system for a marine gas turbine may suppress a reduction of an efficiency even if a space therefor is small. In the exhaust system for a marine gas turbine, in which an end portion of an exhaust diffuser 2 is assembled into an exhaust chamber 1 connected with an upper exhaust eductor 4, the end portion of the exhaust diffuser 2 is disposed in the vicinity of an inlet of the exhaust chamber 1. An outlet 2a of the exhaust diffuser is slanted so that an upper portion of the outlet of an end of the exhaust diffuser is located upstream of a lower portion of the outlet. As a result, the exhaust gas may readily flow around and into the exhaust eductor 4.

Exhaust system for marine gas turbine

A hydrogen-oxygen combustion turbine plant having an improved thermal efficiency and capable of being designed in a flexible manner. The plant is constructed as follows. A compressor is divided into a plurality of units (1A and 1B), a water injection device (14) is disposed between the compressor units, and exhaust water from a condenser (10) of a second turbine (6) is utilized as a water supply. A gas turbine is also divided into a plurality of units (3A to 3C) with multiple axes. Further, not only extracted steam (9A and 9B) from the compressors (1A and 1B) but also the extracted steam (12A and 12B) from the second turbine (6) and the extracted steam (13A and 13B) from the exhaust of the third turbine (8) are used as cooled steam for gas turbines (3A to 3C) and the combustion chamber (2).

Hydrogen-oxygen combustion turbine plant

An object of the present invention is to transfer all of the exhaust heat from the topping gas turbine cycle and thereby improve the overall efficiency (i.e., the efficiency of the topping cycle plus bottoming cycle). The present invention provides a hydrogen-oxygen burning turbine plant which comprises a closed-loop gas turbine cycle including a compressor 2, a hydrogen-oxygen combustor 21 and a turbine 3 and constituting a topping cycle, an exhaust gas boiler (or heat exchanger) 5 installed between the turbine outlet and the compressor inlet of this gas turbine cycle, and a bottoming cycle including an expansion turbine 6, a hydrogen-oxygen combustor 8, a condensing turbine 9 and a steam condenser 11, all of the exhaust heat from the gas turbine cycle being transferred to the bottoming cycle by means of the exhaust gas boiler, the steam that is the combustion product of the gas turbine cycle being extracted from the system at the inlet or outlet of the exhaust gas boiler 5 and conducted to a condensing turbine 22 or 9.

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Takasago, Japan

Hidetaka Mori