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What’s Cool in the Data Center
Thermal Management Innovations
Liebert
®
Indirect Evaporative
Freecooling Unit
MORE EFFICIENCY. MORE CHOICES. MORE EXPERIENCE.
Custom Air Handling Units
Our mission-critical air handlers with Liebert iCOM™ controls deliver efficient, reliable and cost-effective management of heat in large data centers.
We offer the largest selection of air handling solutions, combined with the expert guidance to help you select, implement and maintain the right technology to ensure delivered performance for the lifetime of your data center.
Liebert Indirect Evaporative Freecooling Air Handlers
The Liebert Indirect Evaporative Freecooling AHU is the industry’s most advanced indirect evaporative cooling system, delivering maximum thermal control and optimization. It features our highly efficient epoxy-coated aluminum air-to-air heat exchanger.
More Economical. The system uses much less water than traditional indirect evaporative cooling because our heat exchanger is more effective at dry heat exchange, and allows us to turn on the water only at much higher temperatures. And it uses far less peak power than heat wheels because of the evaporative cooling effect of water.
Intelligent Controls. The Indirect Evaporative Freecooling Unit features integrated Liebert iCOM unit controls to maximize data center protection, efficiency and insight. Liebert iCOM controls prevent overcooling and under-cooling by self-optimizing thermal system operations through machine-to-machine communications and advanced algorithms.
Local Service and Support. All of our solutions are backed by local customer engineers with decades of data center experience and a network of factory-trained service technicians.
Highly Efficient
Mechanical PUE less than 1.2
Low cost per kW without outside air
Balanced capacity utilization and efficiency
Greater Protection
No outside air required for economization
Anti-corrosion and anti-scale coatings on heat exchanger
Advanced monitoring and event notification
Finely tuned controls for more consistent unit supply air temperature and minimized swings across component ranges
Lower Installation & Maintenance Costs
Extended dry mode range
Less water usage and treatment
Downsized electrical infrastructure
Controls require little if any customization
Insight for Action
Simplified access to real-time data and trending
Faster and easier system diagnostics
Key Attributes
High efficiency systems with mechanical PUE < 1.2
Downsized electrical infrastructure
No outside air required for economizing
Typical Deployments
Large units deployed around the building perimeter or on the roof
Full containment system with elevated supply and return temperatures for greatest efficiency
Liebert Indirect Evaporative Freecooling Units deployed at Green House Data, Cheyenne, WY
Liebert
®
Indirect Evaporative
Freecooling Unit
What’s Cool in the Data Center
Thermal Management Innovations
Data Center Air Stream
Supply Fan Array
Filters
Optional Trim
Cooling Coil
Outdoor Air Stream
Mist Eliminator
Spray Nozzles
Scavenger Air
Optional
Condenser
Coil
Return Air from Data
Center ~100°F
Heat
Exchanger
Supply Air to
Data Center
~75°F Recirculation
Pump
Sump Basin for Water
Scavenger
Air
Heat
Exchanger
Compresser
Section
Industry-Leading Efficiency
The Liebert ® Indirect Evaporative Freecooling Unit achieves higher effi ciency through economization without the risks of bringing outside air into the data center. During the majority of annual operating hours cooling of data center air is done by transferring heat to the scavenger air stream while passing through a coated aluminum heat exchanger.
As ambient conditions increase to temperatures above ~60°F dry bulb the unit cools the scavenger air through use of the evaporative cooling effect of water to provide increased cooling capacity without the use of compressors. During exceptionally hot ambient conditions the supplemental trim cooling system will engage to provide additional cooling capacity.
This unit offers several signifi cant advantages for large data center designs. The evaporative cooling effect offers a signifi cantly lower peak power consumption compared to other large thermal management system. The exceptional dry mode effectiveness of the epoxy-coated aluminum heat exchanger reduces water usage and allows fl exibility in operating modes to prioritize reduced water consumption, reduced power consumption, or a combination of both.
Emerson Network Power
Global Headquarters
1050 Dearborn Drive
P.O. Box 29186
Columbus, Ohio 43229
800 877 9222 Phone (U.S. & Canada Only)
614 888 0246 Phone (Outside U.S.)
EmersonNetworkPower.com
While every precaution has been taken to ensure accuracy and completeness in this literature, Liebert Corporation assumes no responsibility, and disclaims all liability for damages resulting from use of this information or for any errors or omissions. © 2015 Liebert Corporation. All rights reserved throughout the world. Specifications subject to change without notice. All names referred to are trademarks or registered trademarks of their respective owners. ® Liebert is a registered trademark of the Liebert Corporation. Avocent is a trademark of Avocent Corporation. Emerson, Consider it Solved, Emerson Network Power and the Emerson Network Power logo are trademarks and service marks of Emerson
Electric Co. ©2015 Emerson Electric Co.
SL-19711 (06/15) Printed in USA
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