环境温度对燃机联合循环热力性能的影响

Influence of Ambient Temperature on Thermal Performance of E-Class Gas-steam Combined Cycle

针对某电厂燃机运行数据,分析了环境温度在不同运行负荷工况下,对燃-蒸联合循环三大主机的热力性能的影响。分析了环境温度对燃机的热效率、排气流量和排气温度的影响;通过计算结果分析对余热锅炉的高、低压蒸气流量、排烟温度和热效率的影响;对汽轮机的输出功率、热效率和排气湿度的影响;最后总结了对燃-蒸联合循环的热效率和相对输出功率的影响,得出该级燃机在15℃时联合循环热效率最高。

By using a gas turbine power plant operating data, to analyze influence of ambient temperature on thermal performance of three main equipments in gas- steam combined cycle at different operating load conditions. It contains the influences of ambient temperature on thermal efficiency, exhaust gas flows and temperature of gas turbine. By calculation , to analyze influence of ambient temperature on high and low pressure steam flow rates, exhaust temperature and thermal efficiency of HRSG, to analyze influence of ambient temperature on output power, thermal efficiency of steam turbine. Finally summarize the influences of ambient temperature on thermal efficiency and relative output power of combined cycle, and the result shows it gets the highest thermal efficiency at 15 ℃.