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『Calculation formula for gas pipeline flow rate』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. Calculation of Gas Pipe Diameter and Flow Velocity
The calculation method for gas pipe diameter and flow velocity is as follows:
1. Given the flow rate Q and pipe diameter D, the flow velocity V can be calculated using the following formula: V=4Q/where Q is the flow rate of the gas pipeline and D is the inner diameter of the gas pipeline. This formula is based on the principle that the flow rate is equal to the cross-sectional area of the pipeline multiplied by the flow velocity.
2. Determination of the resistance coefficient λ along the pipeline. The resistance coefficient λ along the pipeline is an important factor affecting the friction loss of gas pipelines, and its value depends on the Reynolds number Re: laminar flow state: λ=64/Re, where Reynolds number Re=Vd/ν, V is the flow velocity, d is the inner diameter of the pipeline, and ν is the kinematic viscosity of the fluid.
. Critical state: λ=0.03+/This formula is used to describe the abrupt transition state from laminar to turbulent flow. Turbulent state: For steel pipes, λ=0.11+^ 0.25, where K is the roughness of the inner wall of the pipe.III. Calculation of Friction Loss Rm per Unit Length of Gas Pipeline The friction loss Rm per unit length of gas pipeline can be calculated using the following formula: Rm=P/L=6.26 * 10 ^ 7 * λ * * ρ *, where P is the pressure difference at both ends of the pipeline, L is the length of the pipeline, λ is the resistance coefficient along the pipeline, Q is the calculated flow rate of the gas pipeline, d is the inner diameter of the gas pipeline, ρ is the density of the gas, T is the temperature of the gas, and To is the reference temperature.
. By using the above formula, we can calculate
2.6 What is the hourly flow rate of natural gas in the pipeline?
6. The hourly flow rate of Lijin gas in the pipeline is about 6-15 cubic meters, which is greatly affected by pressure, pipe materials, and equipment.
. 1. Common household scenarios have a flow rate of about 0.3-0.5 cubic meters of gas per hour for ordinary household gas stoves. Assuming all firepower is turned on, the maximum carrying capacity of the 6-tube stove can reach 6-15 cubic meters per hour. This is equivalent to supporting the gas demand of 3-5 stoves and 1 gas water heater simultaneously.2. The professional estimation method for gas flow calculation formula is: flow=pipeline cross-sectional area x flow rate x 3600. Calculated based on a diameter of 20mm and a flow rate of 8m/s (medium and low pressure gas standard) for 6 pipes, the theoretical maximum flow rate is approximately 18.1 cubic meters per hour. In practical applications, safety factors will be considered, and it is recommended to use a load capacity of 60% -80%.
3. Three core influencing factors • Gas pressure: ordinary residential gas pressure is about 2kPa (200mm water column), commercial gas can reach more than 10kPa, and the flow rate will increase by about 1.5 times when the pressure is increased by one time • Inner wall resistance of the pipe material: The new stainless steel corrugated pipe has a 20% -30% higher flow efficiency than the old galvanized pipe • Temperature and p