May I ask what kind of flow meter is used by experts to measure the flow of saturated water vapor?
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May I ask what kind of flow meter is used by experts to measure the flow of saturated water vapor? Which is the flow meter used to measure the flow rate of pure saturated water vapor? Thank you. Can any ordinary steam flow meter be used? Regarding the reply: Vortex flowmeter: The amount of steam we measure is very small. Up to 24 KG/H for DN15. The flow rate is around 0.4 m/S. I checked whether vortex flowmeters are inaccurate when measuring low flow rates Can this one be measured? Which one meets my standards? Send me a text message! In Shanghai. This post was last edited by wwxxss_1 on 2009-3-10 11:42]
Vortex street meters work very well for measuring saturated steam
Vortex flowmeters are better; E+H offers flowmeters specifically designed for such media
Vortex flow meter with temperature difference compensation
Our company makes extensive use of vortex flowmeters; we also use delta bar and orifice plates, selecting the appropriate type based on our needs.
The amount of steam we measure is very small. The maximum flow rate is 24 KG/H, with a flow speed of around 0.2–0.4 m/s. I found that the minimum measurement range for vortex flow meters is quite high. Which one meets my standards? Send me a text message!
It is generally better to use a vortex flow meter.
Vortex flow meter with temperature and pressure compensation, or multi-parameter flow transmitter with temperature and pressure compensation (EJX910 or ROSEMOUNT 3095 series)
What is the pipe diameter? If that doesn’t work, reduce the diameter to increase the flow rate.
Vortex flow meter with temperature and pressure compensation
There are many types of orifice plates; for large diameters, Anubaa ones are used, and vortex flow meters with temperature and pressure compensation are also good options
Both vortex flow meters and orifice plates can be used, but orifice plates cause greater pressure loss, while vortex flow meters are sensitive to disturbances, especially at the inlet; their sensitivity is quite high. If there is a potentiometer for adjusting sensitivity, set it to the appropriate value.
Vortex flowmeters are generally used; those from E+H or Yokogawa will work as well
Since the flow rate is low, use a orifice plate with temperature and pressure compensation
Under specific flow conditions, a portion of the fluid’s kinetic energy is converted into fluid vibration, and the vibration frequency has a definite proportional relationship with the flow velocity (flow rate). Flow meters that operate on this principle are known as fluid vibration flow meters. Currently, there are three types of fluid vibration flowmeters: vortex flowmeters, swirl flowmeters, and jet flowmeters. Fluid vibration flowmeters have the following characteristics: 1) The output is in the form of pulse frequency, which is proportional to the actual volumetric flow rate of the fluid being measured; it is not affected by the fluid’s composition, density, pressure, or temperature ； 2) Wide measurement range, with a typical ratio of over 10:1 ； 3) The accuracy is at a medium-to-high level ； 4) No moving parts, high reliability ； 5) Simple and robust structure, easy to install, with low maintenance costs ； 6) It has a wide range of applications and can be used with liquids, gases, and vapors. This article only introduces the vortex street flowmeter (hereinafter referred to as VSF or flowmeter). VSF involves placing one (or more) bluff bodies in the fluid; the fluid separates on either side of these bluff bodies, resulting in the formation of two sets of regular vortices. Within a certain range of flow rates, the frequency of vortex separation is proportional to the average flow velocity within the pipe. By using various types of sensing elements to measure the vortex frequency, it is possible to determine the flow rate of the fluid.
You can check out the following resources: Accurate measurement of steam flow: http://bbs.hcbbs.com/thread-49808-1-21.html Measurement of liquids with high saturated vapor pressures: http://bbs.hcbbs.com/thread-42385-1-21.html How to ensure accurate measurement of steam flow: http://bbs.hcbbs.com/thread-134282-1-18.html Selection of steam flow meters: http://bbs.hcbbs.com/thread-144909-1-16.html Selection of steam meters in energy measurement: http://bbs.hcbbs.com/thread-137463-1-14.html Software for calculating steam flow: http://bbs.hcbbs.com/thread-197544-1-13.html Compensation for superheated steam measurement: http://bbs.hcbbs.com/thread-260823-1-6.html Origin and current status of thermal mass flow meters: http://bbs.hcbbs.com/thread-344639-1-3.html