Dear all,
To model a hot water panel radiator I used the HVACTemplate:Zone:BaseboardHeat class, and added a radiation fraction of 0.3 (and the associated surfaces) to the ZONEHVAC:BASEBOARD:RADIANTCONVECTIVE:WATER object in the expanded input file.
However, as soon as I add the radiant fraction, I get multiple warnings as follows:
** Warning ** ControlCompOutput: Maximum iterations exceeded for ZoneHVAC:Baseboard:RadiantConvective:Water = THERMAL ZONE 1 BASEBOARD HEAT
** ~~~ ** ... Load met = 63.13578 W.
** ~~~ ** ... Load requested = 89.73270 W.
** ~~~ ** ... Error = 26.59691103 %.
** ~~~ ** ... Tolerance = 0.10000000 %.
** ~~~ ** ... Error = (Load met - Load requested) / MAXIMUM(Load requested, 100)
** ~~~ ** ... Actuated Node Mass Flow Rate =3.855145384E-003 kg/s
** ~~~ ** Environment=RUN PERIOD 1, at Simulation time=01/01 10:30 - 10:40
I also noticed that the annual value for 'Baseboard Total Heating Rate' does not equal the sum of 'Baseboard Convective Heating Rate' and 'Baseboard Radiant Heating Rate'.
I would appreciate it, if you comment on this.
Shall I size the system manually for such a case, or solely adding a radiant fraction in the expanded file is inconsistent with something else in the model?
Regards,
Farhang Tahmasebi
TU Wien