论文部分内容阅读
凝汽器换热面的洁净是运行中影响工作效率的基本因素之一。因此,系统性地监控凝汽器换热面状况以及按最优期限进行清洗(当定期清洗的话)具有很大意义。全苏热工研究所早在1951年首先提出用凝汽器的洁净系数β_э来表征换热面状况。目前乌拉尔热工研究所制定了一种确定凝汽器最优最小值洁净系数βэ最优的方法,从而可以定出凝汽器管清洗的最优期限。为此,作者绘制出年经济效益(通过上述监控取得的)和给定冷却水温和流速下洁净系数值的关系曲线,即Э年=f(βэ)。Э年的最大值确定最优最小洁净系数值。引入凝汽器换热面洁净度监控而构成之年经济效益值Э年可以用由于及时清洗使真空度增高而带来的效益值Э减去因清洗期间少发电量的总费用Э_1和进行清洗
Condenser heat exchanger surface cleanliness is one of the basic factors affecting the efficiency of work. Therefore, it is of great significance to systematically monitor the condition of the condenser heat exchange surfaces and to clean them on a regular basis (when cleaned regularly). As early as 1951, the Institute of Thermal Engineering of All-Su proposed using the coefficient of cleanness of the condenser β_ 来 to characterize the heat transfer surface condition. At present, the Ural Institute of Thermal Engineering has developed a method to determine the optimal minimum clean-up coefficient βÉÉ of the condenser, so that the optimal period of condenser tube cleaning can be determined. For this purpose, the author plots the annual economic benefits (obtained through the above monitoring) and the cleanliness value at a given cooling water temperature and flow rate, ie, Э year = f (βэ). The maximum annual value of Э determines the optimal minimum cleanliness value. The introduction of condenser heat exchanger surface cleanliness monitoring and the composition of the annual economic value of Э years can be used as a result of timely cleaning to increase the vacuum caused by the value of benefits Э minus the total cost of cleaning less electricity generation Э_1 and cleaning