Other than what you will find in the various text books available, I doubt you will find very many articles on sizing dense phase systems.

They are more complex than dilute phase which has been expressed by some as just being able to complete an excel spread sheet.

You will also be challenged by many to define what it is you are referring to as dense phase in the first place.

Trouble shooting is also more difficult as typically there are more controls involved in the air management and distribution.

If you have a specific problem or question, post it and see what the forum can offer.

If your looking for a more detailed involvemnt, feel free to e-mail me at the address below.

Regards ■

I have yet to see a reliable Dense Phase pressure prediction model for dense phase. Since most of the time dense phase conveying systems are proprietary kits everything this thrown into the supplier’s court. Scaling is the method normally used for dense phase design. In this method pressure drop /unit length at a given loading ratio are experimentally determined and then sizing is done from there. The lean phase excel calculations which you have mentioned also uses constants which are determined experimentally with a similar approach.

Over the years various organisations have accumulated data from test trials / system installed, which comes in very handy for designing new systems. However there is some data available in textbooks as conveying characteristic diagrams for a few common materials, which can be used for dense phase system design.

As mentioned above dense phase conveying is very different from lean phase conveying. Feeding the material into the system is one thing maintaining the conveying pressure is also very important as the overall conveying rate will vary greatly if the conveying pressure is no maintained at the desired level. ■