Indirect-Direct Cooling Layout for Data Center Heat Loads
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Solution Overview
Problem
Data centers face significant power consumption and heat management challenges due to increasing compute capabilities, leading to inefficient HVAC systems that account for a substantial portion of energy usage and can affect equipment performance and reliability.
Innovation Solution
A high-efficiency cooling system that combines direct and indirect heat transfer methods, utilizing a cooling section, media exchange section, and mixing section to efficiently cool return air and mix it with outside air, reducing power consumption and enabling a smaller footprint.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional HVAC systems are used to cool data centers, then temperature and humidity control is achieved, but power consumption increases significantly (25-40% of total power usage)
Solution Approach 1:
The cooling system is divided into separate functional modules: an indirect heat exchanger for sensible cooling, a direct evaporative cooler for latent cooling, and a refrigeration system for sub-cooling. This segmentation allows each component to operate independently at optimal efficiency, reducing overall power consumption while maintaining effective temperature and humidity control in data centers
Solution Approach 2:
The patent introduces a cooling fluid as an intermediary medium that transfers heat from the data center environment through the indirect heat exchanger. This fluid-mediated heat transfer mechanism enables more efficient thermal management compared to direct air conditioning, significantly reducing the energy required for cooling operations
2Power
If compute capability is increased in data center equipment, then processing power improves, but heat generation increases proportionally
Solution Approach 1:
The system changes the thermal parameters of the cooling fluid as it passes through different stages: the indirect heat exchanger removes sensible heat, the evaporative cooler removes latent heat through phase change, and the refrigeration system provides sub-cooling. These parameter changes enable the system to handle increasing heat loads from high-performance computing equipment effectively
Solution Approach 2:
The cooling system employs a composite approach combining three different cooling mechanisms (indirect heat exchange, direct evaporative cooling, and refrigeration) into a single integrated system. This composite structure allows the system to manage the thermal byproducts of high compute capability equipment more effectively than any single cooling method could alone
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system achieves significant cost savings by reducing energy use and improving cooling efficiency, effectively managing heat and humidity in data centers and similar high-heat load facilities.
Implementation Method 1
an indirect heat exchanger configured to receive return air and cool the return air by transferring heat from the return air to a cooling fluid
Implementation Method 2
cool the return air by transferring heat from the return air to a cooling fluid that flows through a heat exchanger
Implementation Method 3
a direct evaporative cooler configured to receive the cooling fluid and cool the cooling fluid by transferring heat from the cooling fluid to outside air
Implementation Method 4
a refrigeration system configured to receive the cooling fluid and subcool the cooling fluid
Data Source
AI summary
A cooling system (20) includes a media exchanger (50), a cooling section (22), and a cooling circuit (120) for circulating a cooling fluid (130) between the media exchanger (50) and the cooling section (22). The media exchanger (50) receives outside air (38) and the cooling section (22) receives return air (32) from and interior space (34). When the cooling fluid (130) circulates into the cooling section (22) via the cooling circuit (120), the temperature of the return air (32) is reduced through indirect heat transfer between the cooling fluid (130) and the return air (32) to produce conditioned air (84). The conditioned air (84) is provided as supply air (46) into the interior space (34). When the cooling fluid circulates into the media exchanger via the cooling circuit, the temperature of the cooling fluid is reduced through direct heat transfer between the cooling fluid and the outside air.