【摘要】 提出了一种新的汽轮发电机组真空系统漏气率在线测量方法,通过在电厂凝汽器的抽气管道上加装温度、压力、流速和相对湿度测点,将在线测量得到的这些参数带入推导出的计算式中,可计算得到凝汽器的空气漏入率。为了验证方法的正确性,模拟搭建了电厂凝汽器抽真空管道环境的实验台,不确定度分析显示整个实验系统的不确定度为0.54%,具有较高的对比可靠性。比较了实验数据与计算结果,5种不同工况下,实验值与计算值的相对偏差均在1%以内,验证了上述方法的准确性。更多还原

【Abstract】 Presented was a new method for on-line measuring the gas leakage rate of a turbo-generator unit vacuum system.The method in question can be used to calculate and obtain the air leakage rate of a condenser by additionally installing temperature,pressure and relative humidity measuring points on the gas extraction pipeline of the condenser of a power plant and insert the parameters such on-line measured into the calculation formula derived herein.To verify the correctness of the method,a test rig for simulating the vacuum extraction pipeline environment of the condenser of a power plant was set up.The uncertainty degree of the whole test system from an uncertainty analysis was 0.54%,having a relatively high contrast reliability.Through a comparison of the test data with the calculation results obtained by using the method in question,the relative deviations of the test values from the calculation ones are all within a range of 1% at five operating conditions,thus verifying the correctness of the method under discussion.更多还原