基于回热燃气轮机的CHP循环性能建模与优化

CHP Cycle Performance Modelling and Optimization Based on Regenerative Gas Turbine

燃气轮机热电联产(combined heat and power,CHP)是一种高效的能源利用方式。应用有限时间热力学理论建立了回热燃气轮机CHP循环物理模型,详细描述了工质在各个部件中的热力过程。以可用能率、火用输出率、利润率为研究目标,优化了压气机进气压降(等同于工质质量流率)和压比,得到了循环最优性能及相应参数,分析了回热度和供热温度对循环性能的影响,研究结果可对实际燃气轮机CHP装置优化设计提供一定的指导。

Gas turbine CHP(combined heat and power) is a high efficiency enenrgy utilization mode. This paper has established regenerative gas turbine CHP cycle physical model using finite time thermodynamics, and has detailedly described the thermal process of working fluid in each component. Taking useful energy rate, exergy output rate and profit rate as study objetives, the inlet pressure drop(the same as working fluid mass flow rate) and pressure ratio of the compressor are optimized, meanwhile the optimal cycle performances and corresponding parameters are obtained. The effects of regenerative degree and heating temperature on the cycle performance are analyzed. The research results can provide some guidance for the optimal design of real gas turbine CHP plant.