燃气轮机中冷循环功率和功率密度优化比较

Optimum performance comparison of intercooled gas turbine cycle under power and power density conditions

计入高低温侧换热器和中冷器的热阻损失、压气机和涡轮机中的不可逆压缩和膨胀损失及管路中压力损失,用有限时间热力学方法导出了变温热源条件下不可逆闭式燃气轮机中冷循环功率和功率密度(功率与循环中最大比容之比)的解析式;分别以功率和功率密度为目标,优化了中间压比、高低温侧换热器及中冷器热导率分配,并对结果进行了比较。

The analytical formulae for the power and power density of an irreversible closed intercooled gas turbine cycle coupled to variable-temperature heat reservoirs were derived by using finite time thermodynamics with the heat resistance losses in the hot- and cold-side heat exchangers and the intercooler, the irreversible compression and expansion losses in the compressors and the turbine, and the pressure drop loss in the piping. The intercooling pressure ratio and the heat conductance distribution of the hot- and cold-side heat exchangers and the intercooler were optimized by taking the power and the power density as the optimization objectives, respectively. Comparison between the optimization performance of the power and the power density were also presented.