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『Calculation formula for air compressor 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. How to calculate the volumetric flow rate of an air compressor in industrial and mining conditions?
The core calculation logic of the volumetric flow rate of an air compressor in industrial and mining conditions is based on the standard operating condition conversion of the actual intake state. The core formula is standard volumetric flow rate=actual intake flow rate x (actual pressure/standard pressure) x (standard temperature/actual temperature) # # # 1 Basic parameter definition and premise clarification: Two types of working condition parameters - actual working condition parameters: the measured atmospheric pressure P1 (unit: kPa, usually the local atmospheric pressure, about 101.325kPa) at the inlet of the air compressor, the inlet temperature T1 (unit: K, i.e. Celsius temperature+273.15), and the actual exhaust pressure P2 (unit: kPa, gauge pressure+local atmospheric pressure) - standard working condition benchmark: the commonly used domestic standard is dry air with an inlet pressure of 101.325kPa, an inlet temperature of 293.15K (20 ℃), and a relative humidity of 0%. Some industries may use 15 ℃ or 0 ℃ benchmark, and the agreed standard needs to be confirmed in advance. ### 2. The general calculation formula for branch seepage is the standard volumetric flow rate formula converted according to the intake state. $$Q_2=Q_1 \ times \ frac {P_1 \ times Ts} {P_s \ times T1} $- $Q_2 $: the volumetric flow rate under standard operating conditions (unit: m ³/min or m ³/h) - $Q_1 $: the actual volumetric flow rate at the intake of the air compressor (unit: m ³/min, can be measured by a flow meter or derived from the displacement) - $P_s $: the intake pressure under standard operating conditions, fixed at 10
1 Atmospheric pressure intake scenario without pre-processing: Directly use the local atmospheric pressure as P1, convert the measured intake temperature into Kelvin temperature, and substitute it into the formula 2 Scenarios with gas storage tanks/post-treatment equipment: Additional consideration should be given to pipeline losses, and the actual intake flow rate should be corrected by approximately 3% -5% based on pipeline pressure drop Simple estimation of screw air compressor: If the motor power N (kW) is known, the empirical formula $Q_2 ≈ 0.1 \ sim0.12 \ times N $(unit: m ³/min) can be used. This value is only for selection reference and needs to be adjusted according to actual working conditions. ### 4. Precautions - if the air compressor intake is taken from the enclosed workshop, the actual intake pressure will be slightly lower than the local atmospheric pressure, which needs to be measured and then substituted into the calculation - the volume residual flow marked on some imported air compressors is English standard (cfm), which needs to be converted into metric units based on 1cfm ≈ 0.0283m ³/min - under the high-altitude industrial and mining scenario, the local atmospheric pressure wil