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Home > Stulz > Free Cooling for Data Centers

Free Cooling for Data Centers

White Paper Published By: Stulz
Published:  Dec 02, 2015
Type:  White Paper
Length:  15 pages

As shown in this white paper, there are several methods for reducing the PUE and the energy bill of a data center by means of free cooling. No system is perfect, and all systems described here have some limitations; some have regional advantages, others may offer advantages due to the size of the data center. Adiabatic assistance is useful but may not be used everywhere and not under all circumstances. It is important to evaluate what kind of free cooling is best suited to the application on a case by case basis.


Data Center Temperatures and Free Cooling
Direct Free Cooling
Indirect Free Cooling
Single-stage Indirect Free Cooling 
Two-stage Indirect Free Cooling
Two-stage Indirect Free Cooling: CRAC with dry cooler
Two-stage Indirect Free Cooling: CRAH with chiller 
Adiabatic Assistance 
Adiabatic Assistance with Direct Free Cooling Systems 
Adiabatic Assistance with Indirect Free Cooling Systems 
Techniques of Adiabatic Cooling 
Use of Adiabatic Assistance 
Other Free Cooling Systems 

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