Comparison and verification of numerical simulation and actual measurement of temperature rise of water cut-off at terminal in a machine room of the State Grid

For a machine room of the State Grid, a comparative study of the actual measurement and numerical simulation of the entire process from the closing to the opening of the air conditioning terminal water valve is carried out in this paper. The results show that the average simulation error of the temperature sensor on the front door of the cabinet in cold aisle and hot aisle is 3.1% and 3.6% respectively, and the overall change trend of the transient simulated temperature rise is consistent. The maximum hourly average error of each sensor in the cold aisle is 13.88%, and the average value is 9.31%. The analysis of safe operation strategy shows that the proposed optimization scheme can ensure that the temperature rise limit of cold aisle sensors is all below 32 ℃. The numerical simulation can effectively predict the temperature rise of IT equipment in the machine room and reduce the occurrence of temperature rise disaster events in the machine room.