Thermoelectric Air Re-Cooling for Downstream Electronics
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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, as increased airflow leads to noise and dust buildup, and designing components to withstand higher temperatures is impractical, especially with advancing processor technology and increasing server counts.
Innovation Solution
The system employs a thermoelectric cooling module (TEC) to separate heated air into parallel streams, where one stream is cooled and the other heated, using the Peltier effect, to extract heat from pre-heated air before it reaches sensitive components, thereby reducing inlet temperatures to downstream subsystems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If air flow rate is increased to cool downstream components, then cooling effectiveness is improved, but noise increases and dust buildup increases
Solution Approach 1:
The air flow path is segmented into multiple pathways: a first pathway directs cooler air to temperature-sensitive downstream components, while a second pathway directs warmer air to more robust components. This segmentation allows different components to receive appropriately tempered air without increasing overall air flow rate, thus avoiding noise and dust issues while achieving effective cooling.
Solution Approach 2:
Different regions of the enclosure receive different air temperatures tailored to the thermal sensitivity of components in those regions. Temperature-sensitive components receive cooler air through the first pathway, while robust components receive warmer air through the second pathway. This local differentiation optimizes cooling effectiveness without requiring uniform high air flow throughout the system.
2Power
If upstream components heat air to high temperatures, then processing power can be increased, but downstream components become harder to cool
Solution Approach 1:
The air flow system is divided into separate pathways that allow downstream components to receive cooler air independent of the overall heating from upstream components. This enables upstream components to operate at higher power levels while downstream components are protected through dedicated cooling pathways.
Solution Approach 2:
The system introduces an intermediary air pathway that provides cooler air to temperature-sensitive downstream components, acting as a buffer between the heated air from upstream components and the sensitive downstream components. This intermediary pathway allows high processor power operation without compromising downstream component cooling.
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 provides localized cooling to temperature-sensitive components while transferring heat to more robust components, maintaining overall system reliability and accommodating future increases in processor power without significant changes to existing constraints.
Implementation Method 1
using the Peltier effect, to extract heat from pre-heated air before it reaches sensitive components
Implementation Method 2
The first heat exchanger is in thermal contact with a first side of a thermoelectric cooling module. The second heat exchanger is in thermal contact with a second side of the thermoelectric cooling module.
Implementation Method 3
the amount of heat that must be removed requires the use of forced convection across or through each of the heat-generating components
Data Source
AI summary
A method for selectively cooling one or more heat-generating electronic components in an enclosure. Air is passed through an enclosure that houses one or more heat-generating components. Heated air is separated into at least first and second parallel airstreams within the enclosure. The first airstream is passed through a first heat exchanger in thermal contact with a first side of a thermoelectric cooling module. The second airstream is passed through a second heat exchanger in thermal contact with a second side of the thermoelectric cooling module. A voltage is applied to the thermoelectric cooling module to cool the first side and heat the second side of the thermoelectric cooling module. A temperature at a location in the enclosure in sensed and the voltage applied to the thermoelectric cooling module is varied in response to the sensed temperature.