A pneumatic conveying computer program must calculate the pneumatic conveying variables in the first place, s.a. gas flow, pressure drop, capacity.
However, a pneumatic conveying is much more than just the pneumatic conveying part.
Over the many years of development of pneumatic conveying, a vast number of installation types have been made.
Examples are:
-Pressure systems
-Vacuum systems
-pressure tank systems (single tank, double tank, 3-vessel, 5 vessel)
-different feeder systems (tank systems, screw feeder, rotary lock, material column seal)
-feeder system gas leakage
-system with back pressure.
-Closed systems
-Booster systems
In addition, the ambient conditions are influencing:
-Compressor intake conditions
-the gas mass flow
-temperatures
-water condensation
The application of many compressor types also influences the pneumatic conveying variables:
-compressor performance curve
-maximum pressure drop (pressure ratio, depending on type of compressor and altitude)
-energy consumption
-internal leakage
The pressure drop and temperature change over auxiliary components must be accounted for:
-pipeline between compressor and feeder point
-filters, cyclones (filter efficiency)
-feeders
-coolers/water separators
-in line equipment (sieves)
The pneumatic conveying calculation must result in
-airflow
-pressure
-capacity
-local condensation
-local temperatures
-local pressures
-local gas velocities
-local material velocities
-residence times
-bend forces
-partial energy losses
-capacity curve
-Zenz diagram
-Sedimentation
-Safe operating point in relation to choking boundary
All the above must be possible without additional manual calculations.
Therefore, all the possible installation systems, compressors, feeders, booster applications, external conditions must be accessible by selection before a calculation starts.
The above is indicating that pneumatic conveying is a very complex system and that is correct.
Solving such a calculation is only possible by numerical integration and iteration (root finding)
The first calculation is normally done for a certain pipe diameter.
If the first chosen pipe diameter does not bring the require capacity at the require pressure, the calculation must be repeated for a bigger pipe diameter, without leaving the program code.
(changes must be possible within the program)
One extra condition is that the pneumatic conveying properties for a specific material are the same in vacuum pneumatic conveying as well as in a pressure conveying system.
A material pneumatic conveying properties database can be (is) built with this software over many years, based on many calculated lab tests, and built installations.
Experience revealed that the Yarca software discovered many unexpected causes, which were responsible for underperforming or even failing installations. ■
Pneumatic conveying computer program.
A pneumatic conveying computer program must calculate the pneumatic conveying variables in the first place, s.a. gas flow, pressure drop, capacity.
However, a pneumatic conveying is much more than just the pneumatic conveying part.
Over the many years of development of pneumatic conveying, a vast number of installation types have been made.
Examples are:
-Pressure systems
-Vacuum systems
-pressure tank systems (single tank, double tank, 3-vessel, 5 vessel)
-different feeder systems (tank systems, screw feeder, rotary lock, material column seal)
-feeder system gas leakage
-system with back pressure.
-Closed systems
-Booster systems
In addition, the ambient conditions are influencing:
-Compressor intake conditions
-the gas mass flow
-temperatures
-water condensation
The application of many compressor types also influences the pneumatic conveying variables:
-compressor performance curve
-maximum pressure drop (pressure ratio, depending on type of compressor and altitude)
-energy consumption
-internal leakage
The pressure drop and temperature change over auxiliary components must be accounted for:
-pipeline between compressor and feeder point
-filters, cyclones (filter efficiency)
-feeders
-coolers/water separators
-in line equipment (sieves)
The pneumatic conveying calculation must result in
-airflow
-pressure
-capacity
-local condensation
-local temperatures
-local pressures
-local gas velocities
-local material velocities
-residence times
-bend forces
-partial energy losses
-capacity curve
-Zenz diagram
-Sedimentation
-Safe operating point in relation to choking boundary
All the above must be possible without additional manual calculations.
Therefore, all the possible installation systems, compressors, feeders, booster applications, external conditions must be accessible by selection before a calculation starts.
The above is indicating that pneumatic conveying is a very complex system and that is correct.
Solving such a calculation is only possible by numerical integration and iteration (root finding)
The first calculation is normally done for a certain pipe diameter.
If the first chosen pipe diameter does not bring the require capacity at the require pressure, the calculation must be repeated for a bigger pipe diameter, without leaving the program code.
(changes must be possible within the program)
One extra condition is that the pneumatic conveying properties for a specific material are the same in vacuum pneumatic conveying as well as in a pressure conveying system.
A material pneumatic conveying properties database can be (is) built with this software over many years, based on many calculated lab tests, and built installations.
Experience revealed that the Yarca software discovered many unexpected causes, which were responsible for underperforming or even failing installations. ■
Teus