Research on energy-saving operation of chilled-water precision air conditioning units in data centers

Under the actual IT load of the case data center room, this paper adjusts the number of operating chilled-water precision air conditioning units and the percentage range of fan speeds, and then compares and calculates the total power of chilled-water precision air conditioning units under different test scenarios. The results show that under certain operating conditions, the total power of multiple chilled-water precision air conditioning units running at low speeds is lower than that of a small number of chilled-water precision air conditioning units running at medium to high speeds. The degree of uneven cooling capacity distribution of chilled-water precision air conditioning units is positively correlated with the percentage range of fan speeds, and the more uneven the distribution, the greater the total power of chilled-water precision air conditioning units.