Nice work, the computer model saves me answering many questions.
I havent been able to find this information anywhere else:
What are the assumptions in the model though.
Is the friction from the pipe based on tubulent or lamina flow and is the small diameter and possible boundary layer problems consider (ie has boundary layer thickness been considered as a check).
When comparing different widths of pipes is the head loss coefficent from varying diameter considered. For example thermochills are 3/8ths but piping might be 1/2 (this might be taken into account by bills testing) and the inlet and outlet to blocks or pump.
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