Rack Electronics Cooling with Heat Pipes and Transverse Airflow
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional vertical cooling systems for electronics cabinets are inefficient due to increased heat rise and pressure drop from bottom to top, leading to reduced cooling efficiency and increased power usage, especially as connectors generate significant heat that is not effectively cooled.
Innovation Solution
A transverse cooling system where air flows horizontally across electronics assemblies in cabinets, using blower systems and intercoolers to direct and cool air efficiently, reducing temperature gradients and pressure drops, and incorporating heat pipes to extract heat from connectors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If vertical cooling airflow is used from bottom to top, then cooling is provided to electronics assemblies, but cooling efficiency decreases for upper electronics due to heat rise and pressure drop
Solution Approach 1:
The patent transitions from vertical airflow (bottom to top) to transverse airflow (front to back) through the cabinet. This dimensional change allows cool air to reach connectors that extend behind the backplane, which are previously in inaccessible regions. The transverse flow direction eliminates the heat rise accumulation problem inherent in vertical flow, as cool air directly traverses the connector region without passing through heated zones.
Solution Approach 2:
The patent creates localized cooling zones by directing transverse airflow specifically through regions containing heat-generating components. Connectors extending behind the backplane receive dedicated cooling attention through this transverse flow pattern, rather than relying on general vertical airflow that loses cooling capacity due to heat rise. This local quality approach ensures critical components receive adequate cooling regardless of their vertical position.
2Temperature
If air conditioning or intercooler assemblies are added to cool the circulated air, then cooling capacity is increased, but power usage efficiency decreases and heat generation increases
Solution Approach 1:
The transverse cooling system utilizes the natural movement of cool air through the cabinet without requiring active cooling of the supply air. The system self-regulates by allowing cool air to naturally flow from the front, pass through electronics and connectors, and exit the back, eliminating the need for energy-intensive air conditioning or intercooler assemblies. This passive approach maintains cooling capacity while significantly improving power usage efficiency.
3Adaptability or versatility
If connectors extend behind the backplane into the cavity between backplane and cabinet rear wall, then connectivity is provided, but heat from connectors is not efficiently cooled or expelled
Solution Approach 1:
The patent addresses the cooling of connectors in the rear cavity by introducing transverse airflow that specifically targets this previously inaccessible region. The front-to-back flow direction naturally carries cool air into the cavity where connectors extend behind the backplane, providing direct cooling to these components. This dimensional change in airflow direction resolves the heat dissipation problem without compromising connector connectivity.
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 transverse cooling system enhances cooling efficiency, reduces fan power requirements, maintains room-neutral temperature, and decreases energy consumption, allowing for less expensive and reliable cooling solutions while effectively managing heat from both electronics and connectors.
Implementation Method 1
incorporating heat pipes to extract heat from connectors
Implementation Method 2
connectors with heat cooling fingers
Implementation Method 3
air flows horizontally across electronics assemblies in cabinets
Implementation Method 4
using blower systems and intercoolers to direct and cool air efficiently
Data Source
AI summary
A system and method for cooling a plurality of connectors interfacing electrical and optical signals to circuit boards in an electronics cabinet, such as backplane connectors routing signals to circuit boards housed in card cage assemblies. Heat pipes coupled to the connectors efficiently remove heat from the connectors and sink the connector heat to a cold junction of a liquid cooling system, which cooling system may also extract heat from air flow cooling the circuit boards such that the system is room neutral, meaning that the ambient temperature remains constant during operation of the system. The heat connector cooling system is effective where connectors are outside of an air flow cooling envelope that may cool the circuit boards.