Liquid cooling of servers has been a hot topic in recent years. There are great advantages to liquid cooling over air cooling due to the thermal conductivity of liquids. But if the thought of having a liquid flow through your servers in a tube makes you cringe, you aren’t alone. And if the cost to get a water cooled system up and running for a cluster makes you squirm, again, you aren’t alone. But as technology requires more power and cooling, we have to accept the fact that liquid cooling is here to stay. It’s much more efficient to using air cooling, it’s much quieter, and the technology has evolved.
These days, you don’t need to figure out what parts to get and from which manufacturer anymore, because manufacturers are creating kits for different systems. There are also Engineers at companies such as Aspen Systems who have worked with these manufacturers and can figure out what you need for your solution. All of these advances are making it so that these solutions are becoming more affordable, and there is a less chance of any water pouring into your servers.
Asetek has leveraged its expertise as the world leading provider of efficient liquid cooling systems to create solutions for data centers that address these mandates by providing energy savings, cost savings, density increases, and noise reduction. Because liquid is 4,000 times better at storing and transferring heat than air, Asetek’s solutions provide immediate and measurable benefits to large and small data centers alike.
RackCDU D2C (Direct to Chip) is a “free cooling” solution that captures between 60% and 80% of server heat, reducing data center cooling cost by over 50% and allowing 2.5x-5x increases in data center server density. D2C removes heat from CPUs, GPUs and memory modules within servers using water as hot as 40°C (105°F), eliminating the need for chilling to cool these components.
Chilling is the largest portion of data center cooling OpEx and CapEx costs. With RackCDU D2C, less air needs to be cooled and moved by Computer Room Air Handlers (CRAH) or Computer Room Air Conditioning (CRAC) units. Further, liquid cooled servers need less airflow resulting in more energy efficient servers.
|Asetek SKU Number||Description||Motherboard||Chassis|
|35-400-0000032||Intel S2600TPR LC
2 CPU + Memory
|35-400-0000069||Intel S2600KPR LC
Dual CPU Only
|35-400-0000034||Intel S7200AP LC
KNL + VR
|Asetek SKU Number||Description||Motherboard||Chassis|
|35-400-0000045||Supermicro 4U 5048R-E1CR36L
Single CPU Only
|35-400-0000046||Supermicro 1U 1028R-TDW
Dual CPU Only
|35-400-0000054||Supermicro 2U TwinSQ 2028TP-HTFR
Dual CPU Only
|35-400-0000051||Supermicro 1U 1028R-WTR
Dual CPU Only
Asetek’s tube and connector system is the result of extensive research to optimize flexibility in being able to quickly address differences in server board layouts, assure low permeability, high durability and cost effectiveness. The tubing also provides ultra-low permeability.
Motivair Chilled Door
Motivair has a long history of cooling critical process facilities and production equipment. From its earliest days of industrial compressed air treatment to today’s cutting edge chiller and cooling system design and implementation, the Motivair brand is synonymous with process cooling.
The ChilledDoor Rack Cooling System isn’t just a way to remove 100% of the heat from your server rack, it’s a way to change the dynamic of how your data center is cooled. By using advanced “Active” rear door heat exchanger technology, your cooling system becomes a dynamic entity, reacting to minute by minute changes in computing loads of up to 75kW. Whether you’re cooling advanced High Performance Computers, high-end storage, or simple switchgear, the ChilledDoor works to keep your computing environment “heat neutral”.
The ChilledDoor’s smooth metal surface connects seamlessly to your server rack. It moves cooling directly to the rack level where infrastructure meets hardware in perfect unison creating next generation cooling for mission critical IT.
The Chilled Door has the ability to completely transform the way your data center is cooled. Its unique ability to utilize warmer water sources such as cooling towers, river water and high set point Free Cooling chillers creates efficiencies that extend well beyond the white space. Imagine improving your data center efficiencies by up to 70%. Tomorrow’s PUE targets are available today.
OptiCool Technologies is a leading provider of innovative data center cooling solutions. OptiCool specializes in refrigerant-based, close-coupled cooling solutions designed to support a wide variety of data center applications, including both low-density to high-density.
The CDS is mounted at the rear of the IT equipment (typically server) cabinet and removes the heat from the exhaust air. The CDS is modular and can include up to 3 AHX cooling units per door. The design of the CDS allows easy access to the IT equipment by opening and allowing full access to the back of the rack similar to a standard rear enclosure door. The CDS is made of lightweight materials and is readily available in standard cabinet sizes. In addition, there are many cabinet manufacturers that offer “OptiCool Ready” products, where the CDS attaches directly to the cabinet using existing mounting points. For retrofits, we offer door transition kits (DTK) for seamless integration for all major manufacturers cabinets.
OptiCool Technologies award-winning OptiCool data center solution is the latest in technology innovations that maximize efficiencies in cooling, power utilization and space within the data center. This solution allows for adaptability to any rack or cabinet and is flexible and scalable enough to meet the needs of the data center today and in the future.
OptiCool Cool Door System
CoolIt Rack DCLC CHx40
CoolIT Systems is the world leader in energy efficient liquid cooling solutions for the HPC, Cloud and Enterprise markets. As an experienced innovator with 52 patents and more than 2 million liquid cooling units deployed in desktop computers, servers and data centers around the world, CoolIT Systems Direct Contact Liquid Cooling (DCLC) technology is the top choice for OEMs and system integrators.
Rack DCLC modules are designed for a flexible fit to benefit various compute environments. While Server Modules and Manifold Modules are installed with each system and are local to the rack, the appropriate heat rejection method may vary. Rack DCLC offers a variety of heat exchanging modules depending on load requirements and availability of facility water.
Coolcentric delivers the world’s most energy and space efficient cooling solutions and data center cooling equipment for reducing data center costs. Coolcentric patented products for rack-level cooling allow customers to optimize data centers for maximum performance and return on investment.
The Coolcentric family of heat exchangers comprises of passive, liquid cooled heat exchangers, Rear Door Heat Exchangers (Standard RDHx and Low Density RDHx-LD) replace standard rear doors on IT rack enclosures, and the Sidecar is an in-row heat exchanger. Close-coupled to the IT enclosure, the heat exchangers bring cooling as close to the heat source as possible thus providing the ultimate containment solution. Taking up a minimum of floor space, the Coolcentric heat exchangers are flexible, efficient and space-saving turn-key cooling solutions.
The Coolcentric RDHx-LD is a new member of the Coolcentric family of rear door heat exchangers designed to extend available energy and cooling efficiencies, and resulting cost savings, to installations with low to medium rack densities of 5-12 kW. The RDHx-LD can be intermixed with other RDHx family products in a data center installation to accommodate low, medium and high density requirements.
Coolcentric Rear Door Heat Exchanger
There are multiple ways to cool your data center. One of the more traditional ways data centers are being cooled is by Computer Room Air Conditioning (CRAC) or Computer Room Air Handler (CRAH) units. These are large air conditioning units which cool the entire data center. This usually has either a front to back cooling. While this method is commonly used, it is not always the most efficient, as the hot isles aren’t always very well contained. Also, you most likely would need a raised floor for best efficiency.
APC has come up with one way to contain the hot aisle, and that is by creating a hot aisle containment and using in-row coolers. These in-row coolers sit in between the racks and take the hot air from the hot aisle (contained by a roof and doors), and cool that air and blow it into the cold aisle. A raised floor is not necessary for this model.
Example of InRow Cooling, with Enclosed Heat Isle
CRAC Example where Cold Air Enters from Raised Floor.
In today’s data centers, traditional cooling approaches involve complex air distribution systems that tend to be unpredictable. With InRow cooling, placing the unit in the row of racks moves the source of cooling closer to the heat load, minimizing air mixing and providing a predictable cooling architecture.
Remember that some of the solutions described are less costly than others. Some of the more cost beneficial cooling solutions are to ensure that your current system is fully optimized and serviced, while properly sealing the floor and adopting row‐based/hot‐aisle arrangements. Whether you require modular systems for close‐to‐the‐source hot‐zone targeting, or a fully contained thermally‐neutral system, Aspen Systems can help you decide on the appropriate liquid cooling architecture for your HPC system.
Improving a data center’s power efficiency will greatly reduce the necessary cost to cool the facility. Utilizing higher voltages and the latest UPS/PDUs will improve overall energy efficiencies and thereby decrease wasted heat output. Remember that 1 Watt of power consumed requires 1 Watt of cooling. So, understanding your heat/wattage output will also help you to configure the optimal and most efficient cooling solution. See the section on Power for a more detailed explanation about the benefits of using higher voltages and latest generation power components.