Equithermal Curve (v1.0)

Lib.Mervis.v1_0.EquithermalCurve

  • Lib.Mervis

Block for calculating the heating medium temperature according to the equithermal curve.

program test
    var
        eq: lib.mervis.v1_0.EquithermalCurve;
    end_var

    eq();
end_program
Inputs Name Data TypeRetainMandatory ConnectionMeaning
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 Name Data TypeMeaning
t_flow real Calculated heating medium temperature
t_returnreal Calculated return heating medium temperature

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
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