Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
I had this in draft all afternoon, and now I like the prior answers that came before. But just in case those don't solve it...
The real-world scenario (obviously breaking down before reaching 200C!) is that the system can't reject enough heat that is being added to your system.
1) Can you also trend flow rate in addition to the tower's temperature?
2) What internal loads did you assume for the spaces? Could there be an error that is way overloading the space with heat gain'? You said the building ran with a VAV system though and the results were reasonable, so this probably isn't the fix.
3) Check your equipment capacities to be reasonable for this size building - cfm/sf, square feet per ton (add up all the heat pumps), square feet per ton of cooling tower, etc. Do these match up with the VAV system case?
4) The system seems to take a drastic turn for the worse at the beginning of February, are there any changes in occupancy schedules or equipment availability around that time?
5) Does the system have a boiler? If so, maybe get rid of the glycol.
