Hi All,
I have some doubts regarding UFAD simulations and errors and I would appreciate a lot your help:
1.The UFAD systems from exemple files contains just VAV System as HVAC option. Is there some problem in modeling UFAD system with Unit Ventilator or Fan Coil option??
2. I checked some nodes temperature and found something I couldn´t fix until now. The chiller inlet node temp is 75°, the outlet node is 5°C (lower limit), but after the mixer the bypass temperature (supply side bypass) overrides the chiller temp. After the mixer the temperature around 70°C (CW Supply Outlet Node)
-All equipments (chiller, tower, pumps, unitventilatior, fancoils) are in autosize.
- I tried to set up the chiller capacity but didn´t work.
- Is that a water flow problem?
- Is it mandatory to keep the chiller bypass??
- I got some warnings, maybe can help you understand better.
** Warning ** Temperature out of range [-100. to 200.] (PsyPsatFnTemp)
** ~~~ ** Max=314.03706 C Min=312.949246 C
** Warning ** GetSpecificHeatGlycol: Temperature out of range (too high) for fluid specific heat
** ~~~ ** Max=279.818702 {C} Min=193.974766 {C}
** Warning ** GetDensityGlycol: Temperature out of range (too high) for fluid density
** ~~~ ** Max=107.275179 {C} Min=100.37377 {C}
3. Probably as a consequence of the problem above mentioned the temperature in my simulation is not converging. Room mean temperature around 250°C.....
Thank you very much for your attention.
Regards,
Diego