增大燃气热电联产供热能力的方式研究——应用3S离合背压供热与应用基于吸收式换热的集中供热技术的比较

Study on heating ability improvement of heat and power cogeneration system by natural gas—Comparison between back pressure heating technology with 3S clutch and central heating technology based on absorption heat exchange

为提高燃气蒸汽联合循环热电联产供热能力,研究了应用3S离合器背压供热技术和基于吸收式换热(Co-ah)的热电联产集中供热技术,分析了两种技术的优劣,通过案例给出两种技术的系统形式,对系统进行了热力分析和经济性分析。3S离合器背压供热技术和Co-ah循环供热技术均可以增大供热能力,但是后者不仅能回收乏汽余热,还可以回收烟气余热,是全面提升燃气热电厂供热能力的综合技术。

In order to improve the heating ability of combined-cycle heat and power cogeneration system, studies and compares the back pressure heating technology with SSS clutch and the central heating technology of heat and power cogeneration based on absorption heat exchange （Co-ah）, and analyses both the advantages and the shortages of the two kinds of technologies. Presents the system forms of the two kinds of technologies by case study, and gives the thermodynamic and economical analysis. Both technologies can improve the heating ability. Yet, the latter can recovery residual heat from both dead steam and exhaust smoke, so it is the comprehensive technology for improving heating capacity Of thermal power plants.