横河涡街流量计需要用到温压补偿功能,因为其气体是可压缩流体,当温度和压力变化时,其体积量将随之改变。气体流量测量时均要求流量计输出标准体积流量或质量流量,而涡街流量计只能测量出工况下的体积流量,所以涡街流量计测量一般气体或蒸汽时仪表选型一定要考虑温压补偿功能。通过温压补偿可以将工况体积流量转换为质量流量或标况体积流量。 横河涡街流量计测量蒸汽时,不能使用标准气体状态方程式,饱和蒸气只需压力或温度补偿。当涡街流量计传感器无内置压力、温度检测元件时,只能在仪表内部做静态补偿,就是输入固定的温度和压力值用于补偿。涡街流量计传感器有内置压力和温度检测元件时,仪表根据所测温度和压力判断蒸汽状态是属于饱和蒸气还是过热蒸汽,由仪表内部存储的蒸汽数据库自动计算质量流量。另外可以采用蒸汽流量积算仪,将涡街流量计所测工况体积流量以及温度和压力变送器所测信号传到蒸汽流量积算仪,蒸汽流量积算仪内置过热蒸汽以及饱和蒸气补偿算法,可以输出质量流量。http://www.wuhandekema.com/武汉德科蒙过程控制有限公司027-88062221传真:027-88068180ABSolute;top:0;border:0;width:undefinedpx;height:undefinedpx;" frameborder="0" src="https://googleads.g.doubleclick.net/pagead/ads?guci=2.2.0.0.2.2.0.0&client=ca-pub-6745515041074118&ouTPUt=html&adk=1812271804&adf=3279755396&plat=1%3A32776%2C2%3A32776%2C8%3A134217728%2C9%3A134250504%2C10%3A32%2C11%3A32%2C16%3A8388608%2C17%3A32%2C24%3A32%2C25%3A32%2C30%3A1081344%2C32%3A32%2C40%3A32&format=0x0&url=https%3A%2F%2Fwww.bizrobot.com%2Fcompany_bloginfo.php%3Fact%3D1&ea=0&flash=28.0.0&pra=5&wgl=1&tt_state=W3siaXNzdWVyT3JpZ2luIjoiaHR0cHM6Ly9hZHNlcnZpY2UuZ29vZ2xlLmNvbSISInN0YXRlIjowfSx7Imlzc3Vlck9yaWdpbiI6Imh0dHBzOi8vYXR0ZXN0YXRpb24uYW5kcm9pZC5jb20iLCJzdGF0ZSI6MH1d&dt=1608174048079&bpp=10&bdt=54&idt=101&shv=r20201203&cbv=r20190131&ptt=9&saldr=aa&cookie=ID%3Df208fc56032ec04a-222ab57211c400ce%3AT%3D1602655468%3ART%3D1602655468%3AS%3DALNI_MZ90KP_NdNDKAtfzA4A4RaK0MMehQ&nras=1&correlator=6862906532867&frm=23&ife=1&pv=2&ga_vid=700321345.1608174048&ga_sid=1608174048&ga_hid=2113621275&ga_fc=0&nhd=1&u_tz=480&u_his=8&u_java=0&u_h=1080&u_w=1920&u_ah=1030&u_aw=1920&u_cd=24&u_nplug=11&u_nmime=26&adx=-12245933&ady=-12245933&biw=1234&bih=831&isw=730&ish=360&ifk=2699508910&scr_x=0&scr_y=0&oid=3&pvsid=3179529886613475&pem=596&ref=https%3A%2F%2Fwww.bizrobot.com%2Fcompany_bloginfo.php%3Fadd_suc%3D1&rx=0&eae=2&fc=1920&brdim=860%2C139%2C860%2C139%2C1920%2C0%2C1234%2C831%2C730%2C360&vis=1&rsz=%7C%7Cs%7C&abl=NS&fu=8204&bc=29&ifi=0&uci=0.a6ts60rgi6v2&dtd=122" marginwidth="0" marginheight="0" vspace="0" hspace="0" allowtransparency="true" scrolling="no" allowfullscreen="true" data-google-container-id="0.a6ts60rgi6v2" data-load-complete="true"> |