Hi everyone!
I have this Energyplus model which simulate a hospital building energy consumption. The building has 3 air-cooled chillers with a total capacity of 220 TR which deliver only cooled air. The system has 27 fancoils and 4 pumps without modulation. Comparing the real and simulated plant shows a big deviation: to illustrate, I plotted the measured data and Energyplus output for a little period (temperure of outdoor air included).
As you might remark, the measured data has a great variability! To put in numbers, the standard deviation for measured data is about 34 kW (whole measurement period), while the simulation stands for 5 kW (almost seven times lower).
I am wondering which setting I can change in my model in order to increase the power demand variability for the chilled water plant. Some attempts that I already tried without success:
- Change Chiller COP; - Change Chiller Flow Mode from NotModulated to LeavingSetpointModulated; - Change constant speed pump to variable speed; - Change constant volume to variable volume.
Someone can help me in this issue?
