CRAC Inlet Airfoil Frame for Lower Pressure Drop Cooling
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Solution Overview
Problem
Data centers face challenges in efficiently cooling rack-mounted electronic equipment due to heat build-up and pressure drops within CRAC units, which affect equipment performance and power consumption.
Innovation Solution
The implementation of an airfoil frame within the CRAC unit housing at the inlet, featuring a hollow construction with a leading edge, trailing edge, and staggered slots, reduces pressure drops by creating a boundary layer that minimizes energy losses and enhances airflow efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional CRAC unit housing is used with standard inlet configuration, then the structure is simple and easy to manufacture, but pressure drops occur and airflow efficiency is reduced
Solution Approach 1:
The patent applies an airfoil-shaped frame at the inlet of the CRAC unit housing, replacing conventional straight or angular inlet edges with curved aerodynamic surfaces. This curvature reduces turbulence and pressure drops as air enters the unit, improving airflow efficiency without significantly complicating the overall housing structure.
Solution Approach 2:
The patent modifies the geometric parameters of the inlet region by introducing an airfoil cross-section with specific curvature radii, thickness ratios, and angle configurations. These parameter changes optimize the airflow characteristics and reduce pressure losses while maintaining manufacturing feasibility through standardized airfoil profiles.
2Productivity
If the CRAC unit operates with high power consumption to maintain cooling capacity, then cooling performance is adequate, but energy efficiency is reduced
Solution Approach 1:
The patent converts the harmful effect of pressure drops and turbulence at the inlet into beneficial streamlined airflow by using the airfoil shape. This reduces the work required by the fan system to maintain the same cooling capacity, thereby lowering power consumption while preserving cooling performance.
Solution Approach 2:
By optimizing the airfoil geometric parameters (curvature, thickness, angle), the patent minimizes energy losses in the airflow, reducing the power required by the fan system to deliver the necessary cooling capacity.
3Temperature
If standard inlet design is used in CRAC unit, then manufacturing is simple, but heat build-up occurs due to inadequate airflow
Solution Approach 1:
The airfoil-shaped inlet with its curved surfaces promotes smoother airflow into the CRAC unit, reducing turbulence and improving heat exchange efficiency. This helps prevent heat build-up within the unit while the curved geometry can be manufactured using standard aerodynamic profiling techniques.
Solution Approach 2:
The optimized airfoil parameters enhance the airflow characteristics that prevent heat build-up, and these same parameters are selected to maintain compatibility with conventional manufacturing processes for metal forming and fabrication.
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 configuration significantly reduces pressure drops and improves airflow efficiency, leading to enhanced cooling capacity while decreasing power consumption and heat build-up within the data center.
Implementation Method 1
reduces pressure drops by creating a boundary layer that minimizes energy losses and enhances airflow efficiency
Data Source
AI summary
A computer room air conditioner (CRAC) unit includes a housing having an inlet configured to receive IT air and an outlet configured to exhaust treated air. The CRAC unit further includes a heat exchanger supported by the housing and disposed between the inlet and the outlet of the housing and at least one fan module supported by the housing. The at least one fan module is configured to draw IT air into the housing through the inlet, direct IT air through the heat exchanger, and exhaust treated air through the outlet. The CRAC unit further includes an airfoil frame secured to the housing at the inlet of the housing.