燃气轮机化学回热循环热力学过程分析  

An Analysis of the Thermodynamic Process of a Gas Turbine-based Chemical Recuperative Cycle

作　　者：谭智勇[1] 韩庆[2] 郑洪涛[1] 李琦[2] 

机构地区：[1]哈尔滨工程大学动力与能源工程学院,黑龙江哈尔滨150001 [2]中国船舶重工集团公司第七○三研究所,黑龙江哈尔滨150036

出　　处：《热能动力工程》2010年第2期161-165,241-242,共5页Journal of Engineering for Thermal Energy and Power

基　　金：国防动力基础科研计划基金资助项目(GTDP-0716)

摘　　要：化学回热循环是一种先进的燃气轮机循环方式。为系统研究燃气轮机化学回热循环热力学性能,在循环过程热力学分析的基础上,建立了燃气轮机化学回热循环温熵图,定义了燃料热值相对增加率,推导循环的热效率的数学表达式,对该循环性能进行了分析和计算。结果表明:化学回热循环具有较高的效率,最大效率可达55%以上。化学回热循环效率最佳压比取决于燃气轮机简单循环中的最佳压比,所以化学回热循环是不受压比限制的回热循环。化学回热循环燃料蒸汽转化的深度受排气温度的影响较大,排气温度越低燃料热值的增加率越小。The chemical recuperative cycle represents an advanced gas turbine-based one. To systematically study its thermodynamic performance, established was an entropy-temperature diagram for the above cycle based on a thermodynamic analysis of the cyclic process, and defined was a relative growth rate of the heating value of the fuel. Moreover, a mathematical expression for the thermal efficiency of the cycle was derived along with an analysis and calculation of the cyclic performance. It has been found that the chemical recuperative cycle features a relatively high efficiency and its maximal value can be over 55%. The optimum pressure ratio of the cycle in question depends on the optimum pressure ratio of the gas turbine-based simple cycle. Hence, the chemical recuperative cycle can be regarded as one, not restricted by the pressure ratio. The depth of the fuel-steam conversion in the chemical recuperative cycle is relatively heavily affected by the exhaust gas temperature. The lower the exhaust gas temperature, the less the growth rate of the heating value of the fuel.

关 键 词：燃气轮机 化学回热循环 性能分析 

分 类 号：TK472.5[动力工程及工程热物理—动力机械及工程]