I searched through the other forums, and online for awhile, but still could not find anything on this topic. Basically I have a gas passing through some packing, and I have already calculated both the volume of the packing and the pressure drop through the packing. Now I have to find the energy consumed because of this pressure drop. I don't really know where to go from here, any help would be appreciated.

Thanks

Energy loss is actually the friction loss, and vice versa. More friction - more heat - more energy lost.
If you put your inlet and outlet streams in any flowsheeter, for a given mass flowrate and calculated P, T conditions - the difference in stream heat flows would be the amount of energy wich has been "lost" by friction, or transferred to heat. Or simply read the enthalpy of both streams from corresponding graphs or by using appropriate correlations, and calculate the difference.

If mass transfer is involved in this application, I believe you will have to take into account all phases which are present in the system. In any case, follow the 1st law of thermodynamics: energy conservation inside the controlled volume. Having process simulator would make things much easier for you.