Hi Jan,
There are a few things that need attention in your model:
- use of "absolute reference" blocks: this block prescribes an infinite amount of liquid a 0 K and 0 Pa. It's usually used at the B port of pressure and temperature sensors (or any across variable sensors). Having one at the outlet of a heat exchanger or next to a reservoir doesn't make sense at all. And if a pump is trying to pull liquid from such a reference block, the pressure will go below 0 Pa and the simulation will err out.
- Use of pressure & temperature sensors and flow rate sensors. The former is an across variable sensor, which you place over the two points for which you would like to measure the pressure or temperature DIFFERENCE. The flow rate sensor is a through variablesensor and needs to be placed in line with the flow.
Suggestion:
- Go over Simscape Onramp, if you haven't already, to get familiar with Simscape basics.
- Break down your system into subsystems, and validate each using test harness models. You may build test harness models by using reservoirs as boundary conditions and ideal sources to drive the flow. You will need some reference data to properly size the components in each subsystem.
- Look at a few shipping examples in the thermal liquid domain, play with them, and reuse & resize part of the models when appropriate.
Good luck and happy modeling!
