Translations:Thermodynamic and Mechanical Study/52/en

$T_{HX,\mathrm{r}\mathrm{e}\mathrm{s}}$ is the temperature of the external thermal reservoir, prescribed and constant in the base model. $T_{HX}$ is the mean 0D temperature of the gas in the heat exchanger. $(UA{)}_{HX}$ represents the overall thermal conductance, which may combine convection, wall conduction, and contact resistances.