The efficiencyof a coal-fired thermal plant is typically in the range of 30%-35%. In a combined cycle gas turbine system running on natural gas, the maximum efficiency is in the range 45%-50%.
The optimization of the ecological function makes the entropy generation rate ofcycle decrease greatly and the thermalefficiency increase with the cost of a little decreasing of the power output.
生态学优化以牺牲小部分输出功率为代价，较大地降低了循环的熵产率，而且在一定程度上提高了热机效率。
3
Concurrently analyzed is that improvement of effective thermalefficiency after rise in compression ratio and water injection is resulted from thermalefficiency promotion of fuel-air ideal cycle.