【摘要】 由于低热值气体燃料中含有大量惰性气体,可燃成分少,发热量低,燃料的体积流量大,因而在燃用低热值气体燃料时,燃气-蒸汽联合循环的特性也发生了变化。分析了压缩比、燃气初温、不同燃料成分对联合循环发电装置热效率的影响;阐述了不同燃料成分时压缩燃料耗功的变化,以及对燃气-蒸汽联合循环装置热效率的影响。对比分析了燃气-蒸汽联合循环与蒸汽循环装置的经济性。更多还原

【Abstract】 Low heat value fuel includes more inert gas.less combustible element,lower calorific value,higher volume flow of fuel.Thus result in different characteristics of gas-steam combined cycle.The paper analyzes influence factors of thermal efficiency of gas-steam combined cycle installation,which is compression ratio,inlet temperature and different element of fuel.It is illuminated that the relation of compression fuel power and the thermal efficiency of gas-steam combined cycle installation with using different component of fuel.The paper compares the economy of gas-steam combined cycle with the economy of steam turbine cycle.更多还原