Hello; I am trying to run a model that uses radiant heating and cooling. During the cooling months, the radiant system incounters a reoccuring error. The radiant surface temperature drops below the due-point temperature and condensation occurs. I believe the radiant system is automatically shutting itself off. Here is the warning statement:
Warning ** Surface temperature below dew-point temperature--potential for condensation exists
** ~~~ ** Flow to the following radiant system will be shut-off to avoid condensation
** ~~~ ** Hydronic Radiant System Name = RESISTIVE ZONE RADIANT FLOOR
** ~~~ ** Predicted radiant system surface temperature = 18.30
** ~~~ ** Zone dew-point temperature= 17.48
** ~~~ ** Occurrence info=CHICAGO IL USA TMY2-94846 WMO#=725300, 04/03 14:40 - 14:50
** ~~~ ** Note that there is a 1.00 C safety built-in to the shut-off criteria
** ~~~ ** Note also that this affects all surfaces that are part of this radiant system
Radiant systems are complicated and envolve a lot of engineering skill... can anyone offer advice into this condensation proplem??
Here is another warning that I am getting for days in May and June:
** Warning ** SimHVAC: Maximum iterations (20) exceeded for all HVAC loops, at CHICAGO IL USA TMY2-94846 WMO#=725300, 05/05 15:00 - 15:10
** ~~~ ** ...use Output:Diagnostics,DisplayExtraWarnings; to show more details on each max iteration exceeded.
** Warning ** SimHVAC: Maximum iterations (20) exceeded for all HVAC loops, at CHICAGO IL USA TMY2-94846 WMO#=725300, 05/05 15:00 - 15:02
What does this mean?
Thanks!
Lesley