Energy Saving Analysis of Free Cooling System in the Data Center

[Retracted] Dynamic Combined Optimal Scheduling of Electric Energy and Natural Gas Energy Consumption in Data Center

“…Zhang et al expanded and developed the distributed air ow control model of the data center energy consumption model and applied to the distributed air ow control of the raised oor ventilation system and the vertical placed server, and it could reduce the cooling energy consumption of the traditional ventilation system signi cantly [1]. Yang et al applied the free cooling mode to the data center air conditioning system to reduce the energy consumption [2], Ham et al proposed a server model that could simulate the cooling energy consumption of the data center to determine the temperature di erence between the server heat production, and it was proposed that when the supply air temperature of the computer room air handler is higher than 19 °C, and the cooling energy consumption increases due to the increase of fan energy consumption [3].…”

Improving the cooling performance of a data center: impact of unit arrangement and CFD setups

“…Schmidt et al [6] studied CRACS airflow directions and distribution with various configurations of perforated tile arrays (rows and columns) with constant height of raised floor and it was concluded that : (1) An improved airflow distribution is achieved when both CRAC units discharge air in the same direction, (2) the airflow distribution is more nonuniform when the CRAC units are oriented such that they discharge in opposing direction and their airstreams collide, and (3) there is reverse flow (flow into the plenum) through the perforated tiles close to the CRAC units in operation; the extend of reverse flow diminishes as the number of perforated tiles is reduced. Yang et al [7] studied the effect of free cooling on energy saving in the data center. The test was performed in the city of Jinan (China), and it was found that the average temperature during January, February, and December was below 1 deg.…”

“…25% opening from perforated tiles) for general deployment, (2) high-flow perforated tiles (e.g. 56% open) should be used only in special circumstances, (3) create standard hot-and cold-aisle layouts utilizing rectangular, symmetric layouts, (4) locate CRACs at the end of the hot-aisle (far from perforated tiles) and avoid rows longer than about 20 perforated tiles, (5) design plenums for clear airflow with height of 0.61 m or more, (6) minimize leakage airflow through non-perforated tile openings in the raised floor, (7) keep chilled water pipes and cables away from the exhaust regions of A/C units, and (8) do not increase the airflow rate without addressing the other factors listed above. Huang et al [12] investigated the flow patterns of three air supply setups: (1) underfloor cooling system, (2) row level cooling system, and (3) rack-level cooling system.…”

Performance analysis of tower-based water cooling system for data centers with different ambient temperatures and relatively humidities

“…Levin [12] designed a liquid immersion server and considered the structure, layout, and technical characteristics of the liquid immersion cooling system. Yang [13] proposed a hybrid cooling source operation mode by switching the traditional mechanical cooling mode, partial free cooling mode, and all free cooling mode according to the outdoor temperature. Zhang [14] introduced an integrated cooling system for mechanical refrigeration and thermosiphons.…”