An instrument to calculate the air flow rate of the compressor by m3/h....10 points?

Question

I would like to fit an instrument at each compressor in the factory iam working in to calculate the flow rate of air(m3/h), this will give indication if any compressor is failed to deliver the optimum flow rate or capacity required in each unit in the factory.

please help

Answer 1

For a 'Centrifugal' type, high speed compressor, the air flow is generally measured by using a 'Venturi tube', or an 'o*****e Plate'  type flow meter placed in the suction line to the compressor (or a 'Pitot tube' in the discharge line).

The Mass Flow Meter works on the D.P. (Differential Pressure), measured across the o*****e or Venturi and, depending on the accuracy required, may also be calibrated to take the Suction and Discharge pressures, temperatures and Air Density into the calculation.

For Low Flow protection, the transmitter usually operates a 'Recycle valve' which maintains the mass flow to the compressor by returning a controlled air flow back to the suction from downstream of the after-cooler in order to prevent 'Surging' within the machine which can cause vibration and damage to the bearings, seals and impellers. A 'Low Flow Alarm and Trip' system may also be incorporated.

The flow meter also gives a read-out of the actual flow rate in whatever units it is calibrated for.

Answer 2

Maybe something like this is what you're looking for?

http://www.sierrainstruments.com/product...

I don't know its capacity but it's industrial grade so it might be able to do 500m^3/hr.