Rack Baffle with Inward Flanges for Hot Aisle Separation
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Solution Overview
Problem
Current IT rack designs suffer from reduced cooling efficiency due to the recirculation of hot air from the hot aisle back to the cold aisle, which increases the temperature and reduces airflow management effectiveness.
Innovation Solution
A baffle with inward-facing flanges is used as a back panel in IT racks, directing exhaust air from heat-dissipating electronic components towards a physically separated hot aisle area, preventing recirculation and enhancing airflow management by creating a funnel effect to guide air flow away from the IT gear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If cooling air is pulled or pushed through the rack from cold aisle to hot aisle using external fans, then the electronic components are cooled, but hot air recirculates back to the cold aisle causing temperature increase and reduced cooling efficiency
Solution Approach 1:
The rack is segmented into distinct cold aisle and hot aisle zones using a baffle structure with aperture sections. The baffle divides the rack interior to create separate airflow paths, preventing hot air from mixing with cold air and recirculating back to the cold aisle, thereby maintaining temperature separation and cooling efficiency
Solution Approach 2:
The baffle with aperture sections acts as an intermediary structure between the cold aisle and hot aisle. It selectively directs airflow through controlled apertures while blocking the direct recirculation path of hot air, mediating the airflow to prevent energy loss while maintaining cooling function
2Ease of operation
If the rack is placed a few feet away from adjacent racks in a rack server farm, then rack accessibility and maintenance are facilitated, but hot air escapes from the sides of the rack and circulates back to the front
Solution Approach 1:
The harmful hot air recirculation path is extracted and eliminated by implementing the baffle structure with aperture sections that block the escape of hot air from the sides of the rack. This prevents hot air from leaving the hot aisle and re-entering the cold aisle, addressing the harmful effect while maintaining rack spacing for accessibility
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 baffle effectively separates hot and cold aisles, improving cooling efficiency by preventing hot air recirculation and maintaining a lower ambient temperature in the cold aisle, thereby enhancing the overall airflow management within IT racks.
Implementation Method 1
The AFD includes inward-facing flanges, which direct the exhaust air generated from cooling air flow across heat dissipating electronic components of the IHS towards a physically separated/defined hot aisle area at the back (exterior) of the IT rack
Implementation Method 2
The flanges of the AFD section fold inward towards the back of the electronic components to create a funnel for receiving and directing a flow of exhaust air from the rack chassis
Implementation Method 3
The baffle provides physical separation of (i) a cold aisle located towards a front section of the rack and the electronic components inserted into the rack chassis from (ii) a hot aisle located towards a rear of the rack
Data Source
AI summary
An apparatus, an information handling system (IHS) and a method for supporting air flow management in a rack includes attaching a baffle made of a non-porous material with vertically-spaced apertures or air flow directing (AFD) sections with flanges that direct cooling air flow from heat dissipating electronic components of the rack towards a rear of the rack. The baffle is attached to a rear section of a chassis of the IHS. The baffle provides physical separation of (i) a cold aisle located towards a front section of the rack and the electronic components inserted into the rack chassis from (ii) a hot aisle located towards a rear of the rack. The flanges of the AFD section folds inward towards the electronic components to create a funnel for receiving a flow of cooling air from the hot aisle.