新型注空气循环燃气轮机技术进展及性能研究

Recent Advances and Performance Study of the Novel Type Air-injected Cycle Gas Turbine Technology

燃气轮机注空气循环是指将经过额外压缩机压缩的空气直接或者加湿后,吸收燃气轮机排气余热,并注入燃烧室的一种循环方式,回收了排气余热的同时,增加了流体工质的质量流量,提高了燃气轮机的功率和效率。研究结果表明,注气量受压气机喘振、燃气发生器转速和排气温度的限制存在最大值;干空气注入时应首选燃油量不变模式;湿空气注入时首选注气湿度高的方案。

The gas turbine air injection cycle denotes one in which after directly entering a cycle or having been humidified, the air compressed by an additionally installed compressor will absorb the waste heat from the exhaust gas outgoing from a gas turbine and then will be injected into the combustor. Such a cycle can absorb the waste heat and at the same time can increase the mass flow rate of the working medium and enhance the power and efficiency of the gas turbine. It has been found that the air quantity injected has a maximum value due to the limitation of the surge of the compressor,the rotating speed of the gas generator and the temperature of the exhaust gas. When the dry air injection is chosen,the best choice will be the mode keeping fuel oil quantity constant and when the wet air injection is chosen,the best choice will be the version having a highest humidity of the air injected.