Hideaki Sugishita

A Study of Hydrogen Combustion Turbines

A hydrogen combustion turbine system has been proposed by Mitsubishi Heavy Industries, LTD. which is the Closed Circuit Cooled Topping Recuperation Cycle (CCCTR cycle) and is part of a Japanese government sponsored program WE-NET (“World Energy Network”). This cycle is composed of closed Brayton and Rankine cycles. The efficiency of this cycle is more than 60% HHV (Higher Heat Value) with a power capacity of 500MW. This cycle was selected as the most suitable for hydrogen combustion turbine used for industrial power plant by the Japanese government.A closed circuit steam cooling system has been proposed to cool vanes and blades of the high temperature turbine (HIT) which has inlet temperature of 1700°C and inlet pressure of 45bar.This paper presents the comparisons of the thermal efficiency and the feasibility of components between the CCCTR cycle and other cycles.Copyright

A Study of Advanced Hydrogen/Oxygen Combustion Turbines

Mitsubishi Heavy Industries Ltd. have proposed the advanced hydrogen/oxygen combustion turbine system which is an inter-cooled topping recuperation cycle as part of a Japanese government sponsored program WE-NET (“World Energy Network”). The efficiency of this cycle reaches more than 60% (HHV), not (LHV), with a power capacity of 500MW. This cycle is formed by a compressor, turbines, a combustor and heat exchangers. The combustor bums hydrogen/oxygen to make high temperature (1700 °C) steam.

Economics and Performance Forecast of Gas Turbine Combined Cycle

Forecasts of the economics and performance of gas turbine combined cycle (GTCC) with various types of gas turbines will help power plant designers to select the best type of gas turbine for future Chinese powerplants. The cost and performance of various designs were estimated using the commercial software GT PRO. Improved GTCC output will increase the system efficiency which may induce total investment and will certainly increase the cumulative cash which then will induce the cost and the payback period. The relative annual fuel output increases almost in proportion to the relative GTCC output. China should select the gas turbine that provides the most economical output according to its specific conditions. The analysis shows that a GTCC power plant with a medium-sized 100 to 200 MW output gas turbine is the most suitable for Chinese investors.

Study on the High Efficiency Closed Cycle Gas Turbine System

In WE-NET project Phase I Program, the power generation system with more than 60%(HHV) thermal efficiency had been designed. However, because this system must be fueled by pure hydrogen, commercialization of this system in early stage is thought to be difficult. Therefore, the new project, in which the natural gas fueled system is targeted, has been started since FY1999. In this project, the power generation efficiency is aimed to be 60%(HHV) or higher, with turbine inlet maximum temperature of 1973K. In this report, the feature of the target system is explained at first. Then, the sensitivities of many parameters are examined in detail.© 2001 ASME