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- W2465102472 abstract "At present, supported by improvements of both heat resistant materials of turbine wings and cooling techniques, developments are being made on a super-high efficiency combined cycle, aiming for an inlet temperature higher than 1,500. However, these techniques are difficult to apply for medium and small size gas turbines for cogeneration with a capacity of several thousand kW in terms of economic merit. The technique of improving a material's heat resistivity is also approaching a point of saturation. On the other hand, in the case of medium and small cogeneration systems, the major demand is for electricity, whereas the demand for steam is on the decrease. Because of this reason, various types of systems are utilized which inject the steam generated by a waste heat recovery boiler into the gas turbine to increase the power output. The system proposed here, amongst the several thousand kW-class gas turbine power generation systems without a steam turbine, can achieve an efficiency of 40% or more (turbine inlet temperature:1,000 at HHV standard) which is 5% higher than the Cheng cycle, which currently has the highest efficiency (power generation 6,400kW efficiency at HHV standard 35%). It is a new gas turbine cogeneration system which can usemore » the steam generated efficiently. In this paper, a study was made from a point of exergy on the optimum operating condition of the system that has features of two stage combustion, steam injection and an inter-cooling air compression system. An evaluation was then made on the difference with current systems, and heat efficiency improvement by varying the inlet condition of gas turbine.« less" @default.
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- W2465102472 date "1998-07-01" @default.
- W2465102472 modified "2023-09-26" @default.
- W2465102472 title "Proposal of a novel gas turbine system with high generation efficiency by using two stage combustion and steam injection" @default.
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