Compressed Air Leak and Cost Calculation

The leak cost caused by compressed air leaking is the energy waste of air compressor. It is affected by the factors such as, leak rate, air compressor specific power, and price of electricity. Detected leak rate is influenced by factors such as sampling distance and pressure of the inspected system. Adjust the parameters to re-analyze the leak rate, level and estimated cost.

1. In the Acoustic Analysis pane, set Gas Leak Mode as Compressed Air.
2. Set units for the parameters of compressed air leak via > Display Unit.
3. Adjust gas leak detection parameters to increase the detection accuracy.

   Parameters	Description
   Sampling Distance	Sound intensity decreases with distance increases when traveling in a media.
   Pressure	The pressure of inspected container or tube.

   Note

   • Distance unit, pressure unit and leak rate unit and can be changed at > Display Unit.

   • For the images captured by acoustic imaging cameras of early firmware version (versions before V5.5.79), Sampling Distance or Pressure are not allowed to change. Upgrade your camera to the latest version for new features on image capture and analysis.

   Check the number change in Leak Rate in Acoustic Analysis Result window. To open the window, see Window Layout Adjustment for details.

4. Select a formula according to the required air compressor parameters already known or easily accessed in the Acoustic Analysis pane.

   Table 1 Recommended Formula for Compressed Air Leak

   Already Known/Available Parameters	Recommended Formula
   Air Compressor Specific Power (Y)	Formula 1 Leak Cost= T*X*Y*A CO2 Emission= T*X*Y*B
   Air Compressor Out Flow Rate (Q) Air Compressor Power Consumption (P)	Formula 2 Leak Cost= T*X*P*A/Q CO2 Emission= T*X*P*B/Q
   Air Compressor Output Pressure (p) Air Compressor Motor Efficiency (η)	Formula 3 Leak Cost= T*(p*X*A)/(η*60) CO2 Emission=T*(p*X*B)/(η*60)

   Table 2 Parameters Description in Cost Calculation Formula

   Formula	Parameter	Description
   All formulas	T	Working hours of the air compressor per day/month/year. Its unit depends on Leak Cost Time Unit.
   	X	Leak rate of the target. It is an automatic measured value. The unit depends on Leak Rate Unit.
   	A	The price of 1 kWh electricity. Its unit depends on Currency.
   	B	CO2 emissions per kWh (carbon emissions from electricity). It can be obtained by querying the carbon emission factor of the local power grid.
   Formula1 Leak Cost= T*X*Y*A CO2 Emission= T*X*Y*B	Y	Air compressor specific power, indicating the working efficiency of an air compressor, is the ratio of input power to compressed air flow rate at a given pressure. It can be found in the data sheet of the air compressor.
   Formula2 Leak Cost= T*X*P*A/Q CO2 Emission= T*X*P*B/Q	P	Air compressor power consumption (Unit: kW).
   	Q	Air compressor out flow rate, indicating gas quantity output by air compressor.
   Formula3 Leak Cost= T*(p*X*A)/(η*60) CO2 Emission=T*(p*X*B)/(η*60)	p	Air compressor output pressure, indicating generated pressure of the compressed air ventilated through air compressor.
   	η	Air compressor motor efficiency.

   Note

   • The units of Air Compressor Specific Power (Y) and Air Compressor Out Flow Rate (Q) depend on Leak Rate Unit. Perform unit conversions as needed based on the available data.

   • The unit of Air Compressor Output Pressure (p) is consistent with Pressure.

5. Adjust the value of cost calculation parameters according to the selected formula.
6. Adjust leak level. Larger numbers indicate more severe leaking.

   The Leak Level displayed in Acoustic Analysis Result is a transformed number according to the level settings in the Acoustic Analysis pane.

   Check the leak level change in Acoustic Analysis Result window.

7. Check the analysis result in Acoustic Analysis Result window.