燃气动力装置性能参数的热经济性分析与决策

Thermodynamic-effectiveness Analysis and Decision-making for the Performance Parameters of a Gas Power Plant

热经济性是表征在达到一定技术目的条件下 ,设备的能量利用经济性。从提高经济性的角度出发来对燃气动力装置循环性能参数的分析 ,发现了热效率不适宜作为选择性能参数的热经济性决策指标 ,应以装置的运行成本为决策指标才更为合理 ,因为它兼顾了设计和运行两方面的因素。以等压加热循环的燃气动力装置为例 ,建立了热经济优化模型并得出了热经济性能参数 ,从而说明 。

Thermodynamic effectiveness features the energy, utilization economy of an equipment item under the condition of its having attained a given technical objective. Through an analysis of the performance parameters of a gas power plant from the perspective of enhancing economy it has been found that thermal efficiency is not fit to serve as the decision-making index of thermodynamic effectiveness for the selection of performance parameters. By contrast it is more rational to designate the plant operating cost as a decision-making index, because it has taken into account both the design and operation factors. With a constant-pressure heating cycle-based gas turbine power plant serving as an example a thermodynamic-effectiveness optimization model has been set up along with the determination of its thermodynamic-effectiveness performance parameters. The above example can be used to prove that the seeking and use of thermodynamic-effectiveness performance parameters may be considered as a new method for the design decision-making of a gas power plant.