Temperature for scale effects of vortex flowmeter and solution

Abstract: the effects of temperature on scale vortex flowmeter and solution information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. Huaian holley instrument co. , LTD. Engineers more customers use of vortex flowmeter, vortex flowmeter measurement error are summarized and the treatment method. Introduction about you can we can solve the cause of the error of measurement of vortex flowmeters,. More flow meter manufacturers choose model price quote you are welcome to inquire, here is the temperature for the scale effects of vortex flowmeter and solution article details. Huaian holley instrument engineers more customers use of vortex flowmeter, vortex flowmeter measurement error are summarized and the treatment method. You can through our introduction about vortex flowmeter can be solved in the cause of the error of measurement, in order to better use of vortex flowmeter. To analyze the reasons of the error, we will know the composition of the flowmeter measurement system. It is made of a device, the secondary device and its accessories. The defects in the manufacture, installation is unreasonable, not good debugging, data set errors, work conditions exceed the permitted range, due to long running wear, scaling, jams, and the maintenance is not timely and such increase will cause measurement errors. Vortex flowmeter are, of course, this is not limited, the causes of errors and other flow meter. Today, we analyze the fluid temperature change on the influence of vortex street flowmeter: 1, the fluid temperature change on the reasons that affect the flow coefficient of the vortex flowmeter, the fluid temperature change after, its density change accordingly, thus to differential pressure surrounds us flowmeter and the quality of the speed meter flow measurement error, can be solved by density compensation. In addition, fluid temperature change also cause flowmeter measurement part geometry size changes, and thus caused the error. Temperature caused by geometry size metal materials, general 10 5 the power of C - 1 power, when used to measure steam flow vortex flowmeter, if the temperature change is large, will cause the influence is considerable, usually requires temperature compensation. 2, flow coefficient is affected by the fluid temperature has two parts: the body width changes cause and pipe diameter changes. Why do you say that? Frequency of the karman vortex street and is inversely proportional to the body, after the fluid temperature, increase in body, is inversely proportional to the frequency will decrease, as a low value. Flow coefficient is inversely proportional to the pipe diameter, the fluid temperature, pipe diameter increases, in body circulation sectional area increase, on both sides of the flow coefficient decreases, the flow rate value is low. Vortex flowmeter can be based on user input HL medium temperature on the flow coefficient for automatic correction. 3, to recalculate the Kt ( Kt flow coefficient of fluid temperature t) , often with the actual use of fluid temperature when the design is expected to fluid temperature had obvious difference, for example, some of the steam piping for all users in the design of measuring table are calculated at t = 280 ℃ of superheated steam, the system parameter is found that there are three points away from the heat source plant, one of the state of the user has entered a saturated steam, the steam pressure to zero. 7MPa（ Gage pressure) Meter, the corresponding temperature at 170 ℃, then calculate the error due to temperature change is: & delta; =（ Ktd－Kt） / Kt = ( 0. 9872535Km－0. 992544Km） / 0. 992544公里=﹣0。 53%, type of Ktd for according to the conditions of design calculation of flow coefficient, P/L. Kt is according to the actual temperature calculation of flow coefficient, P/L, obviously, thus introducing error is considerable. Then the solution to this problem is calculated according to actual temperature of the fluid to flow coefficient. Above is all there is in this article, you are welcome to inquire me manufacturer flowmeter selection, quotation, etc.

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