Avoiding heat generation in Pipe (TL) block in Simscape Fluids

Hello everyone,

I am facing a heat generation in a closed loop system with two Pipe (TL), one acting as a heat loss, second one is acting is heat source with close loop regulation. The heat loss is set to 7000W and the heat source output is only 6586W in steady state. The discrepancy is dependent on pipe length and cross-section.

I would like to get rid of the mentioned discrepancy, my idea is to have only the heat source/sink and strictly defined with no additional heat transfer / heat generation in pipe. Is there any solution or any other block, which could be useful?

Thank you

Jakub

[Sarah McElman]

Hi Jakub,

I'm not sure I entirely understand your question, but I notice that the closed loop may not grounded (not sure of the components in the Expansion Tank subsystem). This can and often does lead to temperature differences in any non-isothermal domain. Try connecting a Tank (TL) block (or any "dynamic component") to your network before the Controlled Volumetric Flow Rate Source (TL) block.

[Yifeng Tang]

There seems be another source of energy here: I suspect it's that volumetric flow rate source. Consider check the fluid states in and out of the source block and see whether there is energy/enthalpy added by that.