functioncounterCurrent
Extends from baseFunc.
Information
This functions computes the exchanger effectiveness of for counter current flows.
When both flows have the same thermal capacity ( Cr = 1 ), a zero division occurs. However, an analytical relation is existing for this specific case. To get around the problem, when the value of Cr comes closer to one, a polynomial interpolation between the normal relation and the relation for Cr = 1 is performed.
Inputs
| Type | Name | Default | Description |
|---|---|---|---|
| Real | NTU (from baseFunc) | Number of transfer unit | |
| Real | Cr (from baseFunc) | Ratio of thermal condutance |
Outputs
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.SIunits.Efficiency | Eff (from baseFunc) | Exchanger effectiveness |