Calculation of air compressor flow rate | Formula for calculating air compressor power and flow rate

『Calculation of air compressor flow rate』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)

1. What is the general compressed air flow rate in a factory? There is no fixed standard for the compressed air flow rate in a general factory, usually around 200L/min (for low-power air compressors), but it needs to be dynamically calculated based on the number of pneumatic tools and operating conditions. 1. Core factors affecting flow rate: ① Air compressor power: For low-power models (such as 7.5kW), the typical flow rate is about 200L/min before the age of the child, which can meet the needs of a single pneumatic tool. ② Tool concurrency: When multiple pneumatic tools are running simultaneously, it is necessary to stack the gas consumption of each tool and reserve 20% redundancy. ③ Work pressure: The pressure parameter (unit MPa) directly affects the flow calculation results, and the commonly used pressure range is 0.4-0.8MPa

2. Practical methods for flow calculation: ① Formula for maximum gas consumption of the cylinder: $Q_ {max}=0.047D ^ 2S (p+0.1)/0.1 \ times1/t $Example: D=5cm cylinder, S=10cm stroke, p=0.5MPa, t=2 seconds, Qmax is about 294L/min ② Formula for average gas consumption: Double acting cylinder: $Q_ {average}=2 \ times (s times n \ times q) $Parameter description: stroke length s (cm) x number of cycles per minute n x one-way gas consumption q (L/min) cm), q value can be obtained by consulting the pneumatic tool parameter table. ③ Quick estimation principle: The average air consumption of each standard cylinder (cylinder diameter 50mm) at a pressure of 0.5MPa is about 8-12 L/min.

2. How are the output flow rate and output pressure of the air compressor calculated? The formula for the displacement of a hungry type air compressor is Q=V (P2-P1-1)/T=2 × (9.5-4.5-1)/0.5=16m3/min. The above formula ignores the influence of temperature sensitivity. If there is a large temperature difference between the gas before and after filling the tank, the temperature should also be taken into account when calculating. For example, if the opening pressure of the machine pressure maintenance valve is 4kgf and the rated pressure is 10kgf, it is best to calculate the time T=0.5 (min) consumed by the gas storage tank from P1=4.5kgf to P2=9.5kgf, and the volume of the gas storage tank is V=2m3. The output pressure of air compressors in general industry is 0.69MPa (G), while the pressure sent to the equipment usage point is at least 0.62 MPa. This indicates that the typical air compressor we use has an unloading pressure of 0.69 MPa (G) and a cylinder loading pressure or system pressure of 0.62 MPa (G). Additional information should be noted as follows: 1) Ensure that there are no longer pipelines or other equipment pipelines that affect the volume from the air compressor to the storage tank. If there are, the volume should be included in the calculation. 2) There is no air leakage between the air compressor and the air storage tank. The air storage tank has a closed valve to hold pressure while ensuring that the valve does not leak internally. The pressure gauge on the gas storage tank is in good condition. 3) It is best to adjust the capacity of the air compressor when it fails to prevent the capacity adjustment from affecting the measurement value during the testing process. 4) The frequency converter or belt conveyor should ensure that during the testing process, there should be no situation where the frequency converter reduces the speed or the belt slips and affects the speed at the rated speed of the machine head.

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