Induction Heating Control for High-Pressure Tank Manufacturing
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Solution Overview
Problem
Existing methods for manufacturing high-pressure tanks using induction-heating struggle to uniformly heat the thermosetting resin across the trunk and dome parts in a short time, leading to uneven curing and prolonged heating times.
Innovation Solution
The method employs independent induction-heating means for the trunk and dome parts, with a coil surrounding the tank's longitudinal direction to heat helically-wound fibers, allowing precise temperature control and simultaneous heating of both parts, reducing temperature differences and overall heating time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single induction-heating coil is used to heat the tank, then the device complexity is reduced, but the temperature uniformity between trunk and dome parts deteriorates
Solution Approach 1:
The heating system is segmented into two independent induction-heating coils: a first coil for heating the trunk part and a second coil for heating the dome part. This segmentation allows each coil to be optimized for its specific region, enabling uniform temperature distribution across the entire tank while maintaining manageable device complexity through modular design.
Solution Approach 2:
Different heating strategies are applied to different parts of the tank. The first induction-heating coil is configured with specific winding parameters (number of windings, pitch, radius) optimized for the trunk part, while the second coil is optimized for the dome part. This local quality approach ensures that each region receives appropriate heating intensity and distribution for uniform curing.
2Productivity
If the heating power is increased to shorten heating time, then the productivity is improved, but the temperature control precision deteriorates due to uneven heat distribution
Solution Approach 1:
The heating system is divided into two independently controllable induction-heating coils, allowing simultaneous heating of trunk and dome parts. This parallel heating approach significantly reduces total heating time while maintaining temperature control precision through independent power regulation of each coil, preventing the temperature gradients that would occur with single high-power heating.
Solution Approach 2:
The heating system employs dynamic control where the power output of each induction-heating coil can be independently adjusted during the heating process. This allows real-time optimization of temperature distribution, enabling high productivity through rapid heating while maintaining precision by adapting power levels to the specific thermal needs of each tank region.
3Area of stationary object
If induction-heating is applied to the cap to heat the dome part, then the heating coverage is improved, but the heating efficiency deteriorates because the cap material is difficult to induction-heat
Solution Approach 1:
Instead of directly induction-heating the cap material (which is inefficient), the system uses induction-heating coils that generate electromagnetic fields to heat the carbon fiber-reinforced thermosetting resin layer. The carbon fibers act as an intermediary that efficiently converts electromagnetic energy to heat, which then conducts to the cap and dome part, achieving both wide heating coverage and high heating efficiency.
Solution Approach 2:
The heating system exploits the composite structure of the carbon fiber-reinforced thermosetting resin. The carbon fibers provide excellent electromagnetic absorption and heat generation properties when exposed to induction fields, while the thermosetting resin matrix distributes the heat uniformly. This composite material approach enables efficient heating of the dome part through the resin layer without requiring direct induction-heating of the cap material.
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 approach enables uniform and rapid heating of the thermosetting resin, preventing excessive heat application that could damage the liner and ensuring efficient curing without prolonged heating times.
Implementation Method 1
induction-heating means including first induction-heating means for induction-heating a trunk part and second induction-heating means for induction-heating a dome part
Implementation Method 2
performing a process for thermosetting the fiber-reinforced resin layer by induction-heating
Data Source
AI summary
A method for manufacturing a high pressure tank capable of uniformly heating a thermosetting resin in a short time is provided. A method for manufacturing a high-pressure tank including: a step (a) of preparing a tank intermediate product including a fiber-reinforced resin layer formed by winding a carbon fiber impregnated with a thermosetting resin around a liner including a cap attached thereto; and a step (b) of performing a process for thermosetting the fiber-reinforced resin layer of the tank intermediate product by induction-heating the fiber-reinforced resin layer using induction-heating means, in which: the induction-heating means includes first induction-heating means for induction-heating a trunk part of the tank intermediate product and second induction-heating means for induction-heating a dome part of the tank intermediate product; and a temperature of the trunk part of the tank intermediate product and a temperature of the dome part thereof are controlled independently.