Modular Pod Brazing System Vacuum Energy Transfer
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Solution Overview
Problem
Current Controlled Atmosphere Brazing (CAB) furnace processes are inefficient, costly, and environmentally impactful due to high energy consumption, excessive flux usage leading to residues, and significant carbon dioxide emissions.
Innovation Solution
A modular pod brazing system that utilizes independent, flux-free brazing pods with controlled energy transfer, including focused solar energy, to reduce material and energy consumption and minimize carbon dioxide emissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a CAB furnace is used to maintain a controlled nitrogen atmosphere for brazing, then the brazing process can proceed, but excessive nitrogen consumption (up to 120 m3/hr) and energy usage occur to purge oxygen and water vapor
Solution Approach 1:
The system divides the brazing process into multiple zones along the conveyor belt, with heating elements positioned at specific locations. This segmentation allows localized heating of components as they pass through, rather than heating the entire furnace atmosphere, significantly reducing nitrogen and energy consumption while maintaining brazing quality
Solution Approach 2:
The patent replaces the continuous nitrogen atmosphere with a vacuum environment for the brazing process. By evacuating the furnace before and during brazing, oxygen and water vapor are removed without requiring continuous nitrogen flow, eliminating the need for high-rate gas consumption while preserving brazing integrity
2Reliability
If high temperatures (about 600° C.) are maintained in the CAB furnace for brazing, then the brazing process can be completed, but carbon dioxide emissions increase due to natural gas combustion or electrical power consumption
Solution Approach 1:
The system uses periodic heating cycles where components are heated to brazing temperature only when they are in the heating zone, then cooled as they continue along the conveyor. This intermittent heating approach, combined with vacuum conditions, reduces total energy consumption and associated carbon dioxide emissions while ensuring complete brazing cycles
Solution Approach 2:
The patent replaces thermal convection heating (which requires heating large volumes of gas) with direct radiant heating elements that transfer energy directly to the components. This substitution reduces the energy required to achieve brazing temperatures, thereby reducing carbon dioxide emissions from power generation
3Reliability
If flux is used to clean joined surfaces and promote wetting action, then reliable brazed joints can be formed, but flux residues contaminate components and cause system failures
Solution Approach 1:
The vacuum environment eliminates the need for flux by preventing oxide formation on the metal surfaces before and during brazing. Without oxygen present, surfaces remain clean and reactive, allowing filler metal to wet and bond directly to the base metals without chemical assistance, thus producing flux-free brazed joints free of harmful residues
4Productivity
If a large CAB furnace is used to accommodate multiple components, then production capacity increases, but dead space increases requiring more nitrogen and energy for heating
Solution Approach 1:
The system processes components individually or in small groups as they pass through the conveyor belt, with heating zones positioned only where components are present. This eliminates the need to heat large volumes of empty furnace space, reducing nitrogen consumption and energy usage while maintaining high production capacity through continuous processing
Solution Approach 2:
The conveyor belt system enables continuous brazing operation where components are constantly moving through the process. Heating elements activate only when components are in position, ensuring continuous useful heating action without wasting energy on empty space, thereby improving productivity while reducing energy loss
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 modular pod system achieves efficient, cost-effective, and environmentally friendly brazing by reducing energy and material usage, minimizing flux residues, and lowering carbon emissions, while allowing for flexible and precise control over the brazing process.
Implementation Method 1
a vacuum device in selective fluid communication with the interior of the housing with the vacuum device configured to selectively form a vacuum within the interior of the housing
Implementation Method 2
a first energy source disposed external to the interior of the housing, and a first energy access feature provided through the housing. The first energy access feature forming a pathway for transferring energy from the first energy source to the interior of the housing for heating a workpiece
Implementation Method 3
A solar collection system is configured to collect and redirect solar radiation, and more specifically, is configured to redirect a portion of the collected solar radiation towards each of the modular pods
Data Source
AI summary
A modular pod for performing a brazing process includes a housing defining an interior thereof, a vacuum device in selective fluid communication with the interior of the housing with the vacuum device configured to selectively form a vacuum within the interior of the housing, a first energy source disposed external to the interior of the housing, and a first energy access feature provided through the housing. The first energy access feature forms a pathway for transferring energy from the first energy source to the interior of the housing for heating a workpiece disposed therein in accordance with the brazing process. A heat conductive gas is selectively fluidly communicated to the interior of the housing following formation of the vacuum therein with the heat conductive gas aiding in transferring heat energy to the workpiece during the brazing process.