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As has been mentioned before, this is not possible, but you can achieve the same result by using a ZoneHVAC:Baseboard:Ra

Yes, that is exactly what I used before - but it is not a radiant cooling system.

Hello,

Does anyone know, why the Baseboard Total Heating Rate is not equal to the Baseboard Electricity Rate and not equal to the sum of Baseboard Radiant Heating Rate and Baseboard Convective Heating Rate?

I am trying to model a single room exposed to a constant outdoor condition. For indoor heating I use an electric baseboard heater (operative temperature controlled), which allows me to specify the radiative fraction and distribute it to specific surfaces and people. I ensured that all fractions to people and surfaces sum up to unity:

Frac_people + Frac_surfaces = 1

Where for me Frac_people=0.

Now: the output variables for the baseboard heating indicate the total electric consumed power, which is the same as the sum of the convective and the radiative fraction. From the I/O reference, I understood that the total heating rate should also be the sum of the two and with an efficiency of 1 equal to the electric power.

Baseboard Electricity Rate = Baseboard Total Heating Rate / Efficiency

Baseboard Total Heating Rate = Baseboard Convective Heating Rate + Baseboard Radiant Heating Rate

However, for me the output of the baseboard total heating rate is equal to the convective part only, leaving out the radiant fraction and is therefore also lower than the electricity rate.

I tried changing the radiative fraction, which only changed the value of the Baseboard Radiant Heating Rate. Only in the case of Frac_rad=0 the overall balance seem to add up.

Does anyone have an idea?

Many thanks in advance - I am happy to provide more information if needed!

Unfortunately I am new here and can not upload any files yet?! :/

Another easy way, if you are only interested in a radiant heating system, is to use the ZoneHVAC:Baseboard:RadiantConvec

Incomplete heat balance with CondFD and electric radiant/convective baseboard heater The radiant fraction of an electric

After some investigative simulations, reading the Engineering Reference and the I/O Reference multiple times, I realised

Radiative fraction of electric baseboard heater not included in baseboard's total heating rate Hello, I am trying to mo

Ah, I see! Many thanks!🙏

@Aaron Boranian great explanation, but I wonder how to input the optional field Temperature Difference Between Cutout An

Thanks @Aaron Boranian, here the link to the idf and used epw: IDF epw

Radiative fraction of electric baseboard heater not included in baseboard's total heating rate Hello, I am trying to mo