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Types of Data Center Cooling Techniques

Posted on October 31, 2017 by Gento  |  Comments (6)

Having proper temperature management in your data center is absolutely vital to maintain the functionality of the equipment. Having an excess of warm air and humidity within your data center can create a financial burden for your business that can be avoided. In this guide, you will become more knowledgeable on the types of cooling techniques that you can implement in your data center.

Free Cooling

Free cooling is a cost-effective way to ensure that your data center’s temperature flow is properly functioning. When this technique is used, the cooling used are minimalistic and reduce the overall expenditures for cooling. This method consists of two systems known as air-side economization and water-side economization. Air-side economization uses air from the outdoors to regulate the equipment’s coolness. This technique has its flaws since it can potentially allow pollutants and moisture from the outdoors to enter into the data center. 

Chilled Water System

Liquid cooling can be more efficient and direct in its cooling techniques. This is due to the fact that chilled water can be directly targeted to the desired area, without it being necessary to supply cool air to all areas of the facility. With the chilled water technique, the CRAH is connected to a chiller. As the chilled water travels through coils, it engulfs the heat and deposits it into the chiller. Once the water returns to the chiller, it merges with condenser water flowing through a cooling tower.

Pumped Refrigerant

This method pumps chilled water through a heat exchanger and utilizes a cold pumped refrigerant to draw out the heat. The Pumped Refrigerant technique provides savings since it has the capacity to transmit energy from servers and it allows for humidification to be greatly reduced.

Indirect Air Evaporative System

With this technique, an air-duct that is connected to an indirect air evaporative cooler is utilized. This method is energy efficient and uses weather from the outdoors to cool the facility at times when it is cooler than the temperature inside. This air is used to add cooler air to the airflow within the data center.

Data Center Organization

Optimizing the organization and placement of your data center equipment is an easy and cost-efficient way to ensure that your data center is meeting the temperatures it needs to maintain productivity. Efficient organization for optimum data center temperatures includes hot/ cold aisle arrangement, containment, rack placement, cable organization, and usage of blanking panels.

Hot/ Cold Aisle Arrangement

Managing hot and cold aisles is a typical way to sustain temperatures in data centers. Without separating hot and cold aisles, the air within the data center will experience “mixing”, which is an inefficient use of energy. With air mixing, the equipment does not have the opportunity to be submerged in the optimal temperature that it needs to function. The hot/cold isle method is implemented by positioning racks so that the lanes are divided by hot aisles and cold aisles.

Containment

Through the hot and cold aisles, containment can also be implemented to isolate the hot and cold air from the racks. When containment is in use, the HVAC units can perform more efficiently. For this system, the hot air should be monitored to ensure that the hot aisle is not over-extended.

Rack Placement

The placement of the racks can minimize the heat circulation from rack hot spots. Within the rack, the hottest location is located at the top of the rack. To ensure optimal cooling, you can arrange your racks by organizing their components so that the heavier equipment is located on the lower racks. Since larger equipment circulates the most air, a lower rack placement will ensure that less hot air is dispersed at the top of the rack.

Cable Organization

Maintaining cable organization not only allows your cables to be neater and easier to manage, but it also ensures that the cables are not obstructing the data center’s airflow. It is a small step towards allowing your data center to optimize its airflow.

Blanking Panels

If your racks have unused space and your data center is not utilizing blanking panels, excess heat is being emitted into your data center’s airflow to accommodate rack space that is unoccupied. By using blanking panels, the hot air will be blocked from entering your data center’s airflow, proving greater cooling efficiency.

Environmental Monitoring

In addition to these techniques, it is important to be able to monitor and manage your facility in real-time. In order to ensure that your data center equipment is operating at the optimum temperature, environmental monitoring is important. With environmental sensors, you can monitor and manage your data center’s airflow, humidity levels, temperature, air pressure, and hotspots. More information about environmental monitoring can be found here.

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