Increased heat densities of IT Equipment ( ITE ) in high performance data centers continues to drive the need for more efficient and effective cooling technologies . Traditional air cooling is not a sustainable solution in these settings . While liquid cooling offers far greater efficiencies than air cooling , many liquid cooling options require large capital expenditures , are difficult to integrate with existing infrastructure , and present complications when upgrades or added capacity are needed .
This paper presents a rack level Hybrid Liquid Cooling System ( HLCS ) that couples direct-contact liquid cooling with a rear door cooler air-to-water heat exchanger .
The rack-level Hybrid Liquid Cooling System presents a unique entry point to achieving much higher efficiencies of liquid cooling as well as built-in components that provide flexibility and scalability for attaining additional efficiencies long term .
Content streaming , online banking , cloud computing , sophisticated smart phone apps , eCommerce . These are just a few examples of applications that are fueling data processing and traffic demand in data centers throughout the world . Emerging technologies , such as Artificial Intelligence ( AI ), telemedicine , machine learning , autonomous ( driverless ) vehicles and other real time modeling applications will accelerate demand further . The International Data Corp . ( IDC ) predicts that by 2025 we will generate 175 Zettabytes of data annually . �