Facebook Data Center Design/Operations Improvements by Tom ...

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Psychrometric Chart – FRC• 65F – 85F cold aisletemperature• 90% relative humiditymax• 41.9F min dew pointtemp• DX added for extremeweather criteria in tocondition the airwithin acceptableserver conditions• 35F delta T acrossservers allowed tominimize fan arraysfrom (14) to (8)• Also reduced the evappump skid redundancy

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Psychrometric Chart – PRN1C1D• 65F – 85F cold aisletemperature• 80% relative humiditymax• 41.9F min dew point temp• 35F delta T acrossservers allowed tominimize fan arrays from(14) to (8)• We reduced the evap pumpskid redundancy from 2Nto N• 105F Dry Bulb / 70.3F

Page 3 and 4: Forest City, NC
Page 5 and 6: In-rush Current with PSU• Higher
Page 8 and 9: Lessons Learned - Mechanical
Page 10 and 11: Lessons Learned• Controls issues
Page 12 and 13: Next Steps - Mechanical
Page 14 and 15: From Prineville to Forest City-45%a
Page 18: Questions?

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