Exchanger model without heat transfer coefficient calculation, for
1 phase flow in tubes
The model is for a tube heat exchanger that can have several passes
and extended surface, in an undefined external flowing media. We
need to specify the global U, as it is impossible its calculation.
We define also the internal media. For the external media only Cp,
inlet temperature, and outlet temperature (or mass flow rate) are
needed.
As an alternative it is also possible to use a fixed exchanged
power, or a fixed temperature for the tubes external surface. And,
for better convergence when the exchanger is not in use, switch the
pipes to isenthalpic or adiabatic.
If the exchanger type is undefined, a global LMTD will be used
for the exchanged heat calculation, otherwise a mixed NTU/LTMD
method will be used.
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.FreeFluids.HeatExchangers.HEXgeneric1Ph