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1. How to calculate the calibration coefficient of nitrogen ethylene mass flow meter
Method for calculating the calibration coefficient of nitrogen ethylene mass flow meter
1. Calculation formula: Calibration coefficient (K)=true mass flow rate (Mtrue)/measured mass flow rate (Mmeasy) 2. Specific steps 2.1 Obtaining true mass flow rate • Weight method: Use a high-precision scale to measure the mass of gas flowing into the container within a fixed time (such as collecting 150kg of ethylene in 300 seconds), Mtrue=mass/time (0.5kg/s). Standard table method: Use a calibrated standard flow meter to measure flow rate, convert it to mass flow rate based on gas density (e.g. nitrogen 2.2m ³/h needs to be multiplied by the current density). 2.2 Record the reading of the flow meter to be calibrated and directly read the displayed value of the flow meter to be calibrated (as shown in the example above, 0.48kg/s). 2.3 Calculate the correction coefficient. Songzao Town will input the data into the formula: K=0.5/0.48 ≈ 1.04. three Attention - Measurements should be taken under stable working conditions (constant temperature, constant pressure, and wide range). -Suggest taking the average of multiple measurements (such as 5 times) to improve accuracy.
2. Calculation formula for nitrogen flowmeter
When the fluid flows through the turbine flow sensor, the turbine rotates under the force of fluid thrust, and its speed is proportional to the average flow velocity of the pipeline. The rotation of the turbine periodically changes the magnetic resistance value of the magneto electric converter, and the magnetic flux in the detection coil changes periodically, generating periodic electric pulse signals.
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3. What is the required diameter flow meter for 400 standard cubic meters of nitrogen per hour?
For transporting 400 standard cubic meters of nitrogen per hour, it is recommended to use a DN80 pipeline with a vortex flow meter.
. 1. According to the economic flow rate of industrial gases (10-30 m/s), the recommended pipe diameter for a flow rate of 400 Nm ³/h is as follows: * Flow rate of 10 m/s: pipe diameter ≈ 119 mm, corresponding to DN125 pipeline * Flow rate of 20 m/s: pipe diameter ≈ 84 mm, corresponding to DN80 pipeline (preferred recommendation) * Flow rate of 30 m/s: pipe diameter ≈ 69 mm, corresponding to DN65 pipeline. DN80 pipeline achieves a good balance between flow rate (about 20m/s) and pressure loss, and is a commonly used choice for this flow rate.2. Flow meter selection for DN80 The main types and characteristics of flow meters applicable to pipelines are as follows: | Flow meter types | Characteristics | Applicability | |: --- |: --- | | Vortex flow meters | Simple structure, easy installation and maintenance, high accuracy, low pressure loss | Preferred reco