Calculation of orifice flowmeter| endress hauser

『Calculation of orifice flowmeter』Related information(clamp on meter|electromagnetic meter|venturi meterrotameter|orifice meter|ultrasonic flow meter|mass flow meter|coriolis mass flow meter|coriolis flow meter|magnetic flow meter|magmeter flow meter|magflow flow meter|mag meter flow meter|electromagnetic flow meter|vortex flow meter|turbine flow meter|thermal mass flow meter|thermal flow meter|rotameter flow meter)

1. How to calculate the differential pressure value of an orifice flowmeter?

The orifice flowmeter is a type of differential pressure flowmeter that, like other differential pressure flowmeters, requires a transmitter for data measurement. The classification and respective characteristics are shown in the table below. Orifice flow meters can be widely used in industries such as petroleum, chemical, natural gas, metallurgy, power, and pharmaceuticals for continuous measurement of volumetric or mass flow rates of various liquids, gases, natural gas, and steam. But many people dont know how to calculate an orifice flowmeter. Today, I will discuss with you the calculation formula of an orifice flowmeter. Simply put, the differential pressure value needs to be square root output to correspond to the flow rate. In practical applications, calculations are usually cumbersome and rarely done by oneself. This is calculated using software. Let me give you a practical example. Overview of flow compensation. The measurement principle of a differential pressure flowmeter is based on the principle of mutual conversion of fluid mechanical energy. The fluid flowing in a horizontal pipeline has dynamic pressure energy and static pressure energy (potential energy is equal). Under certain conditions, these two forms of energy can be converted into each other, but the total energy remains unchanged. Taking the volumetric flow formula as an example: Q v=C εΑ/sqr (2 Δ P/(1- β ^ 4)/ρ 1), where: C outflow coefficient; ε coefficient of expansion Α cross-sectional area of the orifice of the throttling element, M ^ 2 Δ P differential pressure output by the throttling device, Pa; β diameter ratio ρ 1 density of the measured fluid at I-I,

kg/m3; Qv volumetric flow rate, m3/h According to the compensation requirements, temperature and pressure compensation need to be added. According to the calculation sheet, the calculation idea is to use the process parameters at 50 degrees as the benchmark to calculate the flow rate at any temperature and pressure. Actually, the important thing is the conversion of density. The calculation formula is as follows: Q=0.7 * d ^ 2 * ε * @ sqr (Δ P/ρ) Nm3/h 0C101.325kPa, which is the volumetric flow rate required to be displayed on the screen at 0 degrees standard atmospheric pressure. According to the density formula: ρ=P * T50/(P50 * T) * ρ 50, where ρ, P, and T represent values at any temperature and pressure, and ρ 50, P50, and T50 represent process reference points at 50 degrees and a gauge pressure of 0.04 MPa. Combining these two formulas, the program can be completed. 2、 Program analysis 1. Instantaneous temperature measurement: must be converted to absolute Celsius temperature; Namely+273.15 pressure quantity: must be converted to absolute pressure for calculation. The calculation of gauge pressure and atmospheric pressure compensation is based on the calculation formula, and the data is saved in the register of the PLC. Simultaneously monitor on the intouch screen. 2. The cumulative amount is triggered by a rising edge scan within 2 seconds, which converts the compensated flow rate value (Nm3/h) by 1800 units into a flow rate value every 2 seconds for cumulative summation. The screen has a reset function.

2. How to calculate the flow rate of the orifice plate? The measurement principle of differential pressure flowmeter is based on the principle of mutual conversion of mechanical energy of fluid. The fluid f

Calculation of orifice flowmeter

1. How to calculate the differential pressure value of an orifice flowmeter?

2. How to calculate the flow rate of the orifice plate? The measurement principle of differential pressure flowmeter is based on the principle of mutual conversion of mechanical energy of fluid. The fluid f

『SILVER Official Website SERVICE』