4. Conclusions
As the energy company charges users according to their total air-conditioning area, they did not care about the amount of the cooling load provided by DCS plant. Therefore, heat metering devices installed in the buildings were in idle. It’s a pity that there were not enough data for our judgment of the cold loss in the cold water transmission process. Through the analysis based on the operation data, local research combined with theoretical analysis for the DCS plant in the cooling season of 2016, we got the following conclusions:
• The cold source production indicator for the whole cooling season was 28.93 W / m2 , which was much lower than the design value because of the low actual simultaneity usage coefficient and low occupancy ratio currently;
• The seasonal COP and EERsys in the whole cooling season were 5.16 and 3.85, respectively;
• The phenomenon of large flow rate with low temperature difference was much serious in the actual running process. It was recommended to improve the level of automation and the accuracy of load forecast.
