So... was considering heat transfer...
Flat surfaces and tubing really sucks! Limited area for the heat to be transferred to from the block to the tubing. What are the options?
- Wrapping the tubing around a block (or a cylinder) with a groove cut for it.
- Same as #2 with a matching outer casing.
- Submersing into a fluid.
#1 : Only about half of the tubing gets the heat transferred from the heater.
#2: Parts must match exactly in order not to damage the tubing. Also, makes the application of the heater much more difficult.
#3: Add a liquid to the handling, and thus more risks.