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Temperature and pressure compensation function of the Wojie flow meter

2017-01-07View Original

Thread Content

Hello everyone, what is the purpose of temperature and pressure compensation in vortex flowmeters? For steam, can a vortex flow meter be used for conditions with an absolute pressure of 20 kPa?
Reply #22017-01-07
Gas density changes with temperature and pressure; temperature and pressure compensation in vortex flowmeters is used to account for changes in the density of the gas. For liquids, however, their density changes very little with temperature and pressure, so temperature and pressure compensation is generally not applied when measuring liquids. I didn’t understand the second sentence....
Reply #32017-01-07
Refer to the ideal gas law: the flow rate of a gas is inversely proportional to pressure and directly proportional to temperature; Therefore, the flow rate of the same medium varies under different temperature and pressure conditions, and the volumetric flow rate is measured based on the flow rate. Therefore, for gas measurement using vortex flow meters, temperature and pressure compensation is the best approach ; As for steam, it is divided into two types: saturated steam and superheated steam. For saturated steam, temperature and pressure are in a proportional relationship; therefore, knowing one of these values allows one to calculate the other. Thus, for saturated steam, it is only necessary to compensate for either the temperature or the pressure. For superheated steam, this relationship does not apply; therefore, to measure accurately, both temperature and pressure must be compensated for simultaneously.
Reply #42017-01-09
Thermal and pressure compensation? They don’t even know that – what a lack of knowledge. It’s cold outside, so having some duck food will help keep you warm.
Reply #52017-01-09
You keep criticizing others everywhere, yet you don’t offer any good suggestions – you must be very idle!
Reply #62017-01-09
Since the density of a gas changes with variations in temperature and pressure, a change in density leads to a corresponding change in volumetric flow rate.
Reply #72017-01-09
You’ve given an answer; why do you keep staring at my posts all day long? Isn’t that annoying? Take a look at all the posted solutions to see if they can help the original poster solve the problem; to put it plainly, the original poster still cannot resolve the issue of temperature and pressure compensation for vortex flowmeters. How exactly should it be compensated, how is it calculated? Please give me some constructive answers.
Reply #82017-01-11
I won’t, I’m not BB; I’m too lazy to deal with you!
Reply #92017-01-11
I won’t, my BB; I’m too lazy to deal with you!
Reply #102017-01-11
What a childlike attitude; you should take the time to read the guidelines more carefully.
Reply #112017-01-11
Take some time to study the professional courses that involve more use of instruments.

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