Airflow Arrester Panel for Data Center Rack Cooling
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Solution Overview
Problem
In data centers, the increased power dissipation of electronics leads to cooling challenges, particularly in large server applications where recirculation of hot air from one rack to another increases inlet temperatures, stressing room air-conditioning and reducing component reliability.
Innovation Solution
An airflow arresting apparatus comprising a panel and track mechanism that blocks airflow between the air outlet and inlet sides of electronics racks, preventing recirculation and improving cooling efficiency by positioning the panel above the racks between these sides.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If increased airflow rates are used to cool high power modules, then cooling effectiveness is improved, but the temperature of exhaust air increases and recirculation problems worsen
Solution Approach 1:
The data center aisle is segmented into distinct cold and hot zones using airflow arresters positioned between racks. These physical barriers divide the continuous airflow path into separate segments, preventing hot exhaust air from mixing with cold supply air and eliminating recirculation while maintaining effective cooling zones.
Solution Approach 2:
Airflow arresters serve as intermediary elements placed between the cold aisle and hot aisle. These devices act as mediators that block and redirect airflow, ensuring that hot air from one rack does not directly enter the air inlet of another rack, thus preventing recirculation while maintaining cooling effectiveness.
2Power
If more powerful air moving devices are used to handle increased power dissipation, then cooling capacity is improved, but device complexity and energy consumption increase
Solution Approach 1:
The airflow arrester extracts and removes the harmful recirculation component from the system. By blocking the recirculation path externally, the existing air moving devices within racks can operate at lower power settings while still achieving effective cooling, thus reducing the need for increasingly powerful and complex air moving devices.
Solution Approach 2:
Instead of increasing the power of air moving devices operating in one dimension (within the rack), the solution introduces a new dimension (vertical airflow blocking above the rack) to control recirculation. This dimensional change allows existing devices to maintain cooling capacity without increasing complexity or power consumption.
3Productivity
If air moving devices operate at higher rotational speeds to increase airflow, then cooling effectiveness is improved, but noise levels increase
Solution Approach 1:
The airflow arrester takes preliminary anti-action by blocking recirculation paths before hot air can re-enter racks. This prevents the need for air moving devices to operate at higher speeds to compensate for recirculation losses, thereby maintaining effective cooling airflow rates while reducing noise from high-speed fan operation.
Data Source
AI summary
An airflow arresting apparatus is provided configured to reside above an electronics rack within a data center. The apparatus includes an airflow arrester and a track mechanism. The airflow arrester includes a collapsible panel sized and configured to reside above the electronics rack, and when operatively positioned above the electronics rack, to extend vertically above the electronics rack and at least partially block airflow from passing over the electronics rack between the air outlet and air inlet sides of the rack. The track mechanism is sized and configured to reside above the electronics rack, and the airflow arrester is slidably engaged with the track mechanism. Positioning of the airflow arrester at a desired location above the electronics rack is facilitated by the airflow arrester slidably engaging the track mechanism.