燃气轮机冷热电联产系统及其热力分析

对采用燃气轮机简单循环和回热循环的冷热电联产系统进行研究,分析了温比、压比、回热器传热温差以及制冷系统性能等变量对系统热力学性能的影响。各变量一方面对节能率有较大的影响;另一方面影响系统的冷电比和热电比,从而改变了系统的适用范围。采用燃气轮机简单循环的系统相对节能率较低,但有较高的冷电比;采用回热循环的系统,具有更高的节能率;回热器传热温差的增大将导致系统节能率的降低,但增大了系统的冷电比。制冷系统性能的改善,将导致整体系统性能的改善,同时增大了系统的冷电比。图12参10

Combined Cooling-Heating-Power Generation Gas Turbine Systems and Their Thermodynamic Analyses

CCHP (combined cooling, heating and power generation) systems with simple and regenerative gas turbine cycles are being discussed, and the effects of variables such as temperature ratio, pressure ratio, heat transfer temperature difference in the regenerator and of the cooling system characteristics, on the overall performance of the system analyzed. On the one hand, each variable has a weighty influence on the fuel energy saving ratio (FESR) and on the other hand, affects the cooling to power as well as the heating to power ratio, herewith changing the suitable field of the system's application. CCHP with simple gas turbine cycles have a lower FESR, but a higher cooling to power ratio while CCHP with regenerative cycles have a higher FESR which reduces with increasing heat transfer temperature difference in the regenerator, while the cooling to power ratio will increase. The performance of system as a whole improves with improving the performance of cooling system, and simultaneously making the cooling to power ratio increase.Figs 12 and refs 10.