But, performance can sometimes be compromised. Mass flow meters can measure high-viscosity liquids. A PD meter can be calibrated at 3 centipoise and be within ☐.5% accuracy in a range of 1 centipoise to 1,000,000 centipoise. Which is one of PD meters main advantages. The accuracy of Positive Displacement meters, such as Oval gear meters, are not greatly affected by changes in viscosity. We define “high viscosity” as: more than (say) 1000 cP. Viscosity effects different meters in different ways. In most cases it is settled by mass flow.
Generally, there should be a real flow calibration facility or an interface connected to a standard meter for online real flow calibration. The flowmeter used for petroleum measurement generally has a large caliber, which is extremely inconvenient to remove for inspection. On-line live flow calibration should be considered.And an error of one thousandth will cause a settlement error of several million yuan per year. For example, the crude oil measured by the crude oil transfer metering station is about several million tons per year. While in In bulk oil measurement, the requirements for measurement accuracy are higher and the significance is greater. The measurement of gasoline, diesel, and crude oil used for entering and leaving enterprises should reach 0.35% accuracy. GB 17167 stipulates that the measurement of gasoline, diesel, and crude oil used for energy consumption assessment of branch plants (workshops) and key energy-consuming equipment should reach 0.5% accuracy. To ensure the interests of both the supply and demand sides. The measurement of oil used for trade settlement must reach the required accuracy.
High measurement accuracy is required.Low viscosity medium like pure water or milk are very thin and easily pumped.Ĭhoose sanitary flow meter for your pure water or milk. Such as oil, asphalt/ bitumen, Fructose，molasses, honey, glucose, resin etc. High viscosity fluids are thick, and are hard to pour and demanding additional power to pump. Normally, High viscosity fluid even can not offer this mini speed. Sino-Inst’s Turbine flow meters, DP flow meters (like orifice plate) are velocisty flowmeters. Lots of different type flow meters cannot measure high viscosity fluid. When a flowmeter applicated in high viscosity liquid, you should select an appropriate meter. This is a dimensionless number that characterises fluid motion. Many high viscosity fluid flow meter technologies operate best in the turbulent flow region i.e. Larger diameter pipes will maintain line pressure drop and liquid transport costs as low as possible. To use these techniques with high viscosity fluids, we can use larger diameter pipes. And they are challenged by high viscosity fluids. Turbine meters, DP flow meters and velocity measuring devices rely on a minimum liquid speed. High viscosity liquids pose a problem for High Viscosity Fluid Flow Meters types. High Visocity flow measurement is also a tough job for us. High Viscosity flow measurement is an important job for many industris. For low-productivity wells with relatively high production fluid viscosity, a more sensitive turbine of the acquisition system should be used to enable it to accurately acquire signals with low speed (less than 0.01 r / s). And it increased exponentially with the Reynolds number at the inlet of the flowmeter.ĥ. Before entering the linear section of the turbine response, the K value continued to increase. Response curves to different viscous fluids.Ĥ. Only after one calibration with different Reynolds numbers under high viscosity conditions. The turbine flowmeter for measuring different viscous fluids can be approximated by the K-value and the Reynolds number of the turbine flowmeter. As the viscosity increases, the K value of the turbine flowmeter will decrease, and the linearity will also deteriorate.ģ. And the minimum speed of the response will also decrease.Ģ. As the viscosity increases, the starting displacement of the turbine flowmeter will decrease.
So how big is the effect of the medium viscosity on the turbine flowmeter? Let’s talk about this next.ġ.
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