Insulating Barrier for Passive Cabinet Cooling
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Solution Overview
Problem
Existing cooling systems for electrical equipment, such as switchgear and circuit breakers, face challenges in efficiently managing heat generated by current-carrying components, leading to increased operational costs and risks of equipment failure due to insulation deterioration and arcing, while also requiring additional power and potentially introducing reliability issues.
Innovation Solution
The implementation of an electrical equipment design featuring a barrier made of electrically insulating material placed within the cabinet to create a channel for air flow between the barrier and current-carrying components, allowing for effective heat dissipation through convection, with optimized spacing and configuration to enhance cooling efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If cooling agents such as fans, heat pipes, refrigeration cycles, or pumped liquid loops are added to the cabinet, then the cooling effectiveness is improved, but the device complexity and reliability are worsened
Solution Approach 1:
The patent removes complex cooling agents (fans, refrigeration cycles, pumped liquid loops) from the cabinet and replaces them with a passive barrier structure that utilizes natural convection currents. The barrier redirects hot air away from electrical components without requiring any active cooling mechanisms, thereby extracting the harmful complexity while maintaining cooling effectiveness.
Solution Approach 2:
The barrier structure enables the cooling system to serve itself by utilizing natural convection currents generated by the heat-generating electrical components. The hot air rises naturally, flows along the barrier, and creates a self-sustaining convection pattern that cools components without requiring external power sources or complex control systems.
2Temperature
If cooling agents such as fans or pumped liquid loops are used, then the cooling capacity is improved, but the power consumption increases
Solution Approach 1:
The barrier structure harnesses the natural convection currents generated by the electrical components themselves to provide cooling. The heat-generating components create upward air currents that naturally flow along the barrier and circulate heat away, eliminating the need for externally powered fans or pumps and reducing overall power consumption.
Solution Approach 2:
The patent converts the harmful hot air that would otherwise accumulate around electrical components into a beneficial cooling mechanism. The hot air rising from the components drives natural convection currents that flow along the barrier structure, effectively using the heat itself as the driving force for the cooling system.
3Temperature
If electrically conducting cooling agents are placed in close proximity to electrical components, then the cooling efficiency is improved, but the risk of arcing and system failures increases
Solution Approach 1:
The barrier acts as an intermediary structure between the hot air and the electrical components. It redirects the hot air flow away from the components without requiring direct contact with electrically conducting materials, thereby maintaining cooling efficiency while eliminating the risk of arcing that would occur with conventional conducting cooling agents.
Solution Approach 2:
The patent extracts electrically conducting cooling agents from the system and replaces them with a non-conducting barrier structure. This removal of conducting materials eliminates the arcing hazard while the barrier continues to provide effective thermal management through natural convection redirection.
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 solution reduces the temperature of electrical components, decreases the risk of arcing, and eliminates the need for additional cooling components, resulting in a more efficient, compact, and reliable cooling system that reduces operational costs and equipment failure risks.
Implementation Method 1
The barrier is placed such that a channel is defined within the cabinet for air to flow between the barrier and the electrical component(s). As the air passes through the channel it comes in contact with the electrical component(s) and due to a difference in temperature of the air and the electrical component(s), the temperature of the electrical component(s) is reduced.
Data Source
Figure 1
Figure 2A~2B
Figure 3~4
AI summary
Electrical equipment that includes a cabinet 202 comprising a plurality of walls 206, 208, 210 is provided. The cabinet is disposed around a plurality of electric components 110 such as conductors. Further, the electrical equipment also includes at least one barrier 204. The barrier is disposed in the cabinet 202 and spaced apart from the conductor by a spacing distance to define a channel 214 within the cabinet for air to flow between the barrier and the conductor. The barrier is placed such that a portion of the barrier is coupled to one of the plurality of walls of the electric cabinets.