Many data centers are located in the interiors of lower levels and basements in buildings, so an air-side economizer
might not be the most cost-effective solution because the data center is hard to reach.
Two basic approaches that accomplish this are air-side economizer
cycles and water-side free cooling.
In most climates however, the switchover from chiller operation to air-side economizer
mode for data centers should be based on enthalpy controls, not on dry-bulb temperature alone.
In addition to displaying live building performance data, educational demonstrations show how the sustainable features in place at the data center actually work, like how free cooling is used to rely on low outside air temperatures to help chill the building's water, and how an air-side economizer
reduces the facility's energy consumption costs.
Note that for fan systems, during occupied hours, Q is the coil load, including the sensible and latent load of conditioning the ventilation air with credit for any air-side economizer
capacity at prevailing return-air and outdoor-air conditions.
One example would be to identify when an air-side economizer
might not be working in the right weather conditions.
ASHRAE Guideline 16-2003, Selecting Outdoor, Return, and Relief Dampers for Air-Side Economizer
Therefore, the recommended approach of using an outdoor air humidity ratio obtained through the internet can significantly improve air-side economizer
The proposed method was evaluated using data obtained for an air-side economizer
and mixing chamber integrated with a typical small commercial rooftop air conditioner.
Get your utility costs under control by adding an air-side economizer
5[degrees]C) as shown in Table 2, which also shows a quick comparison of number of hours when free cooling is available with conventional air-side economizer
as well as with the installed cooling system.