论文部分内容阅读
目前广泛使用的差压式流量计首推孔板,约占流量仪表总数的70%左右,但恰恰是孔板在能耗方面可以说是首屈一指。原因是作为差压式流量计,它的计量基础就是压差,压差越高则测量准确度越高,而造成的永久压损也越大。所以孔板在完成能源计量任务以利节能的同时,却耗费大量能源。统计资料表明,(100~300)mm的管道安装的孔板,以β=0.62,流量按较低的平均流速计算,气相流体
At present, the most widely used differential pressure meter orifice plate, accounting for about 70% of the total flow meter, but it is precisely the orifice in terms of energy consumption can be said to be second to none. The reason is that as a differential pressure flow meter, it is based on the measurement of pressure, the pressure is higher the higher the accuracy of measurement, resulting in permanent pressure loss is also greater. Therefore, the orifice in the completion of energy measurement tasks to facilitate energy saving, but consume a lot of energy. Statistics show that the (100 ~ 300) mm pipe-mounted orifice plate, with β = 0.62, the flow rate calculated by the lower average velocity, the gas-phase fluid