Rack Air Re-Cooling With Thermoelectric Split Airflow
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Solution Overview
Problem
Existing cooling systems for electronic enclosures face challenges in effectively cooling downstream components that receive pre-heated air, which can lead to overheating, especially as processor temperatures increase, and this is exacerbated by limitations in airflow and dust buildup.
Innovation Solution
The implementation of a thermoelectric cooling system that separates air into parallel streams, using a thermoelectric cooling module to cool one stream and heat another, allowing for localized cooling of sensitive components while transferring heat to less sensitive components, thereby maintaining optimal temperatures within the enclosure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If air flow is increased to cool downstream components, then cooling effectiveness is improved, but noise and dust buildup increase
Solution Approach 1:
The air flow path is segmented into multiple pathways: a first air pathway carries pre-heated air away from downstream components, while a second air pathway introduces cooler air to them. This segmentation allows different air streams to serve different cooling needs without requiring high overall air flow rates, thus reducing noise and dust accumulation.
Solution Approach 2:
A thermoelectric cooling module acts as an intermediary between the first and second air pathways. It transfers heat from the pre-heated air in the first pathway to the cooler air in the second pathway, enabling downstream components to be cooled by the thermally modified air without increasing the main air flow rate, thereby avoiding increased noise and dust buildup.
2Productivity
If the number of server blades is increased to improve productivity, then enclosure heat load increases, making cooling more difficult
Solution Approach 1:
The enclosure air cooling system is segmented into multiple independent air pathways that can be scaled with server density. As more server blades are added, additional parallel air pathways can be implemented, each with its own thermoelectric cooling modules, allowing the system to handle increased heat loads without a proportional increase in air flow requirements or noise levels.
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
This approach effectively reduces inlet temperatures to sensitive components, minimizes the risk of overheating, and allows for increased server density within enclosures without significantly increasing airflow or noise, ensuring reliable operation of electronic equipment.
Implementation Method 1
A thermoelectric cooling module is configured such that a first side is cooled and a second side is heated in response to an applied voltage
Implementation Method 2
A first heat exchanger is disposed in the first air pathway and in thermal contact with the first side of the thermoelectric cooling module. A second heat exchanger is disposed in the second air pathway and in thermal contact with the second side of the thermoelectric cooling module
Data Source
AI summary
Embodiments include systems and methods for selectively cooling heat-generating electronic components in an enclosure. According to one embodiment, an enclosure houses a plurality of heat-generating electronic components. Air enters the enclosure at the front and is exhausted at the rear. After passing through one or more upstream components, air diverges into at least first and second airstreams within the enclosure. The first airstream is re-cooled by a cooling system having a thermoelectric cooling module. The thermoelectric cooling module is configured such that a first side is cooled and a second side is heated in response to an applied voltage. A voltage regulator may govern the voltage in response to one or more temperatures sensed within the rack system.