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The temperature of the cold aisle in traditional data centers is typically 68 to 72 degrees, whereas the POD can efficiently operate at temperatures in this range up to 90 degrees. [6] Both the 20c and the 40c are water-cooled. The benefit of water cooling is higher capacity and less power usage than traditional air-cooled systems. [8]
iDataCool allows for cooling with hot water at temperatures of up to 70°C. [1] The waste heat of iDataCool drives a low-temperature adsorption chiller (LTC 09 by InvenSor) that works efficiently already at temperatures around 65°C. The chiller generates chilled water that is used to cool other compute equipment in the data center. The ...
This increase in the high end of the temperature range allows data center operators to use entirely passive dry coolers, or much more efficient evaporative or adiabatic cooling towers instead of chiller-based air cooling or water chillers. This increase in the temperature range also allows operators using single-phase immersion coolants to more ...
These systems can either cool some or all components on a server, using rubber or copper tubing respectively. [79] [71] [80] Rear door heat exchangers were traditionally used for cooling high heat densities in data centers, but these did not see widespread adoption. [81] They can be cooled with refrigerant [82] or chilled water. [83]
Cornell University's Lake Source Cooling System uses Cayuga Lake as a heat sink to operate the central chilled water system for its campus and to also provide cooling to the Ithaca City School District. The system has operated since the summer of 2000 and was built at a cost of $55–60 million. It cools a 14,500 tons (50 MW) load.
Optimizing the data center's power architecture (yields a 4.1 percent energy savings) Implementing a temperature and airflow management strategy (yields a 5.2 percent energy savings) Deploying variable-capacity cooling equipment (including chilled-water and direct-expansion systems) (yields a 2.6 percent energy savings)
The cooling towers of a large chilled water system. As part of a chilled water system, the condenser water absorbs heat from the refrigerant in the condenser barrel of the water chiller and is then sent via return lines to a cooling tower, which is a heat exchange device used to transfer waste heat to the atmosphere.
For a human-powered version, see yakhchal.. When the ambient air temperature drops to a set temperature, a modulating valve allows all or part of the chilled water to by-pass an existing chiller and run through the free cooling system, which uses less power and uses the lower ambient air temperature to cool the water in the system.
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