『Selection of Hydrogen Flow Meter』Related information(v cone flow meter|rotary gas meter|gallon meter|gear meter|metal tube rotameter|glass tube rotameter|nutating disk meter|transit time ultrasonic flow meter|wedge flow meter|pd meters|hydraulic flow meter|ultrasonic water flow meter|water flow meter|air flow meter|magnetic water flow meter|oxygen flow meter|gas flow meter|argon flow meter|air velocity meter|gasoline flow meter|fuel flow meter|ultrasonic water meter|digital water meter|nitrogen flow meter|solid flow meter|Oxygen tank flow meter|digital water flow meter|diesel fuel flow meter|steam flow meter|02 flow meter|compressed air flow meter|oil flow meter|liquid flow meter)
How to measure hydrogen flow rate? At a pressure of 20MPa, the accuracy requirement for measuring hydrogen flow rate is 0.5%, with a flow range of 2000-8000L/h. The following methods can be used to measure hydrogen flow rate:
1. Coriolis flowmeter: - Coriolis flowmeter is a high-precision flow measurement device suitable for high-pressure environments. For example, RHEONIK hydrogen mass flowmeter and TMU-W high-pressure Coriolis flowmeter both have high precision and high pressure resistance, suitable for measuring hydrogen flow rate at a pressure of 20MPa
2. Differential pressure flowmeter: - Differential pressure flowmeter calculates flow rate by measuring the pressure difference before and after the fluid passes through a throttling device (such as an orifice plate). The Rosemount 3051SFP integrated orifice flowmeter has undergone pressure testing and accuracy verification before leaving the factory, and is suitable for high-pressure hydrogen flow measurement with an accuracy of ± 0.75%. 3. Vortex flowmeter: Vortex flowmeter measures flow by detecting the frequency of vortices in the fluid. Although vortex flowmeters are widely used in low-density fluid measurement, their applicability may need to be considered in high-pressure environments. For example, Shanghai Yichang Thin Plate Co., Ltd. has successfully used a float flowmeter to measure hydrogen flow rate. Electromagnetic flowmeter: - Electromagnetic flowmeter calculates flow rate by measuring the electromotive force generated when fluid passes through a magnetic field. Although the evidence mentions the application of electromagnetic flowmeters in hydrogen flow detection, their accuracy and applicability may not be as good as Coriolis flowmeters
5. Ultrasonic flowmeter: - Ultrasonic flowmeter calculates flow by measuring the propagation time of sound waves in the fluid. The Cologne ultrasonic flowmeter does not require regular calibration and maintenance, and is suitable for high-pressure environments, making it suitable for hydrogen flow measurement. Considering accuracy, applicability, and maintenance costs, Coriolis flowmeter and differential pressure flowmeter are the best choices for measuring hydrogen flow rate at a pressure of 20MPa. Coriolis flowmeters such as RHEONIK hydrogen mass flowmeter and TMU-W high-pressure Coriolis flowmeter have the characteristics of high precision and high pressure resistance, and can meet the accuracy requirement of 0.5%. Differential pressure flow meters such as the Rosemount 3051SFP integrated orifice flow meter have undergone accuracy calibration before leaving the factory and are also suitable for measuring high-pressure hydrogen flow.
2. How to choose a flowmeter
1. Before selecting a flowmeter, the type and flow rate value of the measured medium (which can be an estimated value) should be determined, and then the specifications of the vortex flowmeter should be selected according to the flow range corresponding to the vortex flowmeter when measuring different media in the table.
.2、 The flow rate of the measured medium in the pipeline must be within the flow range of the flowmeter, otherwise it cannot be used. It is best to be at 1/2 to 2/3 of the flow range of the flowmeter.
3、 If the actual diameter of the pipeline is larger or smaller than the selected diameter of the flow meter, a contraction tube or ex
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