I have a chilled ceiling system. and I put the chilled water loop exit temperature as 13C and the design temperature difference as 5C. also in setpoint manager, the loop is controlled to supply 13C all the time. but when I ran the chilled ceiling system, the result shows the supply temperature increased to 20C and the return is much higher than design temperature too. the chiller CHW outlet and inlet node temperatures are pretty similar, the supply water is not 13C.
What's the reason of the unexpected and fluctuated supply and return temperature?
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