| SI.Temperature[2] | Ts_h | | Hot side temperature {inlet, outlet} |
| SI.Temperature[2] | Ts_c | | Cold side temperature {inlet, outlet} |
| SI.HeatFlowRate | Q_flow | | Heat transfer rate (e.g., m__flow*cp*dT) |
| SI.CoefficientOfHeatTransfer | U_input | 0 | Overall heat transfer coefficient |
| SI.Area | surfaceArea_input | 0 | Reference heat transfer surface area |
| SI.TemperatureDifference | dT_lm | | Log-mean temperature difference |
| SI.TemperatureDifference[2] | dTs | | Temperature differences for dT_lm |
| SI.Area | surfaceArea | | Reference heat transfer surface area |
| SI.CoefficientOfHeatTransfer | U | | Overall heat transfer coefficient |
| SI.ThermalConductance | UA | | Overall heat transfer conductance |