蒸汽动力循环耦合正、逆制冷循环的电站空冷系统

A New Air Cooling System by Steam Power Cycle Coupled With the Positive and Negative Sequence Refrigerating Cycle

文中提出一种电站汽轮机凝汽器新型间接空冷系统,它通过特制的双相变换热器将蒸气压缩制冷循环及与其并联的逆制冷循环和蒸汽动力循环串接耦合,以使系统能根据环境温度的高低,分别利用正、逆制冷循环的相互切换和制冷设备运行参数的调整将蒸汽动力循环的平均放热温度降低到和水冷系统的相近或更低,从而使该系统既节水又低耗：而且还可增强空冷系统的环境适应能力：高环境温度时段能满发,低环境温度时段无冻害。文中介绍了该系统的组成和工作原理,预测了系统的主要效果,进行了粗略的经济、社会效益估计,指出了有待进一步深入研究的问题。分析得出结论：新空冷系统的原理可信,技术可行,效果显著。

A new indirect air cooling system for steam condenser in power plant was presented, in which the steam power cycle was coupled with the positive and negative sequence refrigerating cycle by means of a special dual-phase change heat exchanger. According to the ambient temperature, the combined power and refrigeration cycle was expected to work in positive or negative order for keeping the turbine back pressure near to or below the conventional water cooling condenser pressure and to build up the capacity for adapting the air cooling system to suit the variation of ambient temperature and wind velocity. This paper illustrated the components and process flow diagram, predicted the effects, evaluated the potential benefit and pointed out the unsolved questions for the new style air cooling system. The conclusions are that the principle is credible, the technology is feasible and effects are outstanding for the new cooling system.