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一、选择最佳冷凝器设计方案的意义汽轮机的背压对于凝汽式汽轮机来说是真空的,即是低于1个大气压的,例如十万千瓦,二十万千瓦汽轮机的背压是0.05ata。为了得到这个背压,可以由结构和大小完全不同的冷凝器来达到。冷凝器内蒸汽的凝结是通过冷却水来达到的,而冷却水要由循环水泵把水打入凝汽器,通过铜管把蒸汽凝结下来,这样就要消耗一定的功率。而不同结构、不同尺寸的冷凝器的造价也是不同的。对于容量不太大的机组的冷凝器设计时往往可以参考已有的机组进行设计,而且凝汽器的造价和循环水泵的耗功都不太大,选择最经济设计方案的意义不是太大。从20万千瓦机组开始进行了背压的技术经济论证,通过论证确定出机组
First, the choice of the meaning of the best condenser design Turbine back pressure for the condensing steam turbine is vacuum, that is less than 1 atm, such as one hundred thousand kilowatts, two hundred thousand kilowatts turbine back pressure is 0.05 ata. In order to get this back pressure, it can be achieved by a condenser of completely different structure and size. Condenser steam condensation is achieved through the cooling water, and cooling water by circulating water pump into the water condenser, the steam through the copper tube condensation, which will consume a certain amount of power. And different structures, different sizes of the condenser cost is different. For the capacity of the unit condenser design often can refer to the existing unit design, and the cost of the condenser and circulating pump power consumption is not too much, choose the most economical design is not too much significance. Starting from 200,000 kilowatts of units began to back pressure technical and economic demonstration, through the demonstration to determine the unit