Equithermal Curve (v1.0)
Full Name
Lib.Mervis.v1_0.EquithermalCurve
Required Project References
- Lib.Mervis
Description
Block for calculating the heating medium temperature according to the equithermal curve.
Usage in ST
program test
var
eq: lib.mervis.v1_0.EquithermalCurve;
end_var
eq();
end_program
Inputs
| Inputs | Name | Data Type | Retain | Mandatory Connection | Meaning |
| In | real | No | Yes | Outdoor temperature | |
| t_i | real | Yes | No | Calculated indoor temperature | |
| t_emin | real | Yes | No | Minimum outdoor temperature | |
| t_w1max | real | Yes | No | Maximum heating medium temperature | |
| t_w2max | real | Yes | No | Minimum heating medium temperature | |
| n | real | Yes | No | Temperature exponent |
Outputs
| Outputs | Name | Data Type | Meaning |
| t_flow | real | Calculated heating medium temperature | |
| t_return | real | Calculated return heating medium temperature |
Detailed Function Description
The block calculates the heating medium temperature based on the outdoor temperature. Recommended values for the parameter n:
| Heating Type | Parameter n Value |
|---|---|
| Underfloor heating | 1.10 |
| Panel radiators | 1.26 to 1.33 |
| Tubular bathroom radiators | 1.20 to 1.30 |
| Radiators according to DIN 4703 | 1.30 |
| Convectors | 1.30 to 1.50 |