摘要
基于联合循环和能量梯级利用的概念,用分析和燃气变比热热力计算法研究生物质整体气化联合循环(BIGCC)中燃烧室的能量利用与损失情况。计算结果表明:燃用生物质燃料气,随燃气轮机初温提高,燃气轮机热效率提高,燃烧室的效率提高,但随燃烧室出口燃气温度的升高,燃烧室的效率提高幅度变缓;燃烧室的效率不仅与燃烧室燃气出口温度、空气入口温度和压力密切有关,还与燃料的组分的相对含量和发热量有关;对生物质燃料气、两种不同热值煤气在燃烧室出口燃气温度为1147℃时的燃烧室的效率进行了比较,两种不同热值煤气的效率较低,生物质燃料气效率最大。
Based on concepts concerning combined cycles and cascade utilization of energy, the conversion and loss of energy in combustion chambers of biomass integrated gasification combined cycles （BIGCC） are studied by means of exergy analysis and thermal calculations with variable specific heat. Calculation results show that, when biomass fuel gas is used, the gas turbine＇s thermal efficiency increases with the turbine＇s inlet temperature, and so does the exergy efficiency of the combustion chamber, but the latter＇ s increase gradually slackens with rising combustion chamber＇ s exit temperature. It is moreover found that the combustion chamber＇s exergy efficiency not only depends on the gas temperature at the chamber＇ s exit and the air temperature and pressure at entrance, but also on the relative proportions of the fuel＇s components and their heating values. The combustion chamber＇s exergy efficiency, in case biomass fuel gas is used, compared with respective cases of using two kinds of coal gas with different heating values, a11 under the same condition of 1147℃ temperature at the combustion chamber＇s exit, shows that the exergy efficiency is relatively lower for both kinds of coal gas with different heating values and that of biomass fuel gas highest. Figs 2, tables 2 and refs 11.
出处
《动力工程》
EI
CSCD
北大核心
2006年第5期747-750,共4页
Power Engineering
