Steam Reformer Design - Tube Count 1

[jdnz]

In the design of a primary steam reformer - can anyone explain how to obtain the tube count? I don't know what the heat transfer coefficient of the tubes is (because this is a function of tube count).

 

[jdnz]

Sorry my question more relates to optimization of tube count. Does it make more sense to use less tubes (but poor heat transfer) or more tubes (better heat transfer but too high pressure drop)

 

[Yordif]

A good resource for SMR's is the " Catalyst Handbook" by Martin Twigg. It has quite a bit of design information and worthwile trying to pick up.

In my experience, the small "can" type reformers ( up fired, up flow) generally have a small number of large 5"+ tubes. The larger down flow reformers generally will go with tube between 2.5" and 5" depending on output and catalyst volume. The more exotic materials also may help the wall thickness / heat transfer rate / Creep life. A micro alloy tube may function better than a HP or an HP modified Tube.

I don't know that this helps but it may get you started.