Current-Limiting Power Controller for Gas Turbine Heat Treatment
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Solution Overview
Problem
Existing localized heating methods for gas turbine engine components, such as resistance and induction heating, are costly, lack process control, and require specialized operator expertise and generic, oversized heating assemblies due to the need for matching power supplies and heating elements.
Innovation Solution
A system comprising a resistance heating element with ceramic insulators and a current-limiting power controller, which provides current-limited electrical power to the heating element, allowing for flexible use with various resistance heating elements and precise temperature control through a silicon controlled rectifier or PID controller, enabling efficient localized heat treatment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If resistance heating elements are matched to specific power supply designs, then heating effectiveness is improved, but device complexity and cost increase due to requiring multiple matched pairs
Solution Approach 1:
The power supply unit is designed with a current-limiting circuit that can adapt to different heating element resistance values, allowing a single power supply to work with multiple heating elements of various specifications. This universal design eliminates the need for multiple matched pairs while maintaining heating effectiveness through automatic current regulation.
Solution Approach 2:
The power supply incorporates a current-limiting circuit that dynamically adjusts the electrical parameters (current output) based on the connected heating element's resistance. This parameter adaptation allows the same power supply to effectively drive different heating elements without requiring precise matching, resolving the contradiction between reliability and device complexity.
2Adaptability or versatility
If generic oversized heating assemblies are used, then adaptability to different areas is improved, but heat dissipation and energy efficiency worsen
Solution Approach 1:
The heating system uses separate, modular heating elements that can be individually selected and positioned for specific heating areas. Instead of one large generic assembly, multiple smaller heating elements are available to match the actual size and shape of the area requiring heat treatment, reducing unnecessary heat dissipation while maintaining versatility.
Solution Approach 2:
The system provides localized heating by selecting heating elements that precisely match the dimensions and requirements of the specific area being treated. This local optimization ensures that energy is concentrated where needed rather than dissipated across a large generic assembly, improving energy efficiency while maintaining adaptability through proper element selection.
3Power
If induction heating methods are used, then heating capability is improved, but cost and operator expertise requirements increase
Solution Approach 1:
The system replaces expensive induction heating equipment with simpler, more affordable resistance heating elements and a basic power supply unit. While induction heating provides rapid heating capability, this solution achieves sufficient heating performance using inexpensive components, reducing both equipment cost and the need for specialized operator training.
Solution Approach 2:
The patent substitutes complex electromagnetic induction heating systems with a simpler electrical resistance heating system. The current-limiting power supply directly controls the heating elements without requiring complex electromagnetic field generation, thereby reducing equipment cost and operational complexity while maintaining adequate heating capability for the application.
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 provides cost-effective, controlled localized heating for gas turbine components, improving process efficiency and reducing operator expertise requirements by allowing multiple heating element configurations to be used with a single power source, while maintaining precise temperature control and minimizing heat dissipation.
Implementation Method 1
resistance heating element, with power being provided to the resistance heating element via the current-limiting power controller
Implementation Method 2
resistance heating element comprising wire and at least one ceramic insulator
Data Source
AI summary
Systems and methods for providing localized heat treatment of gas turbine components are provided. In this regard, an exemplary method includes: identifying an area of a gas turbine component to which localized heat treatment is to be performed; positioning a resistance heating element, sized and shaped to transfer heat to the area, adjacent the area; electrically coupling a current-limiting power controller to the resistance heating element; and locally heating the area using the resistance heating element, with power being provided to the resistance heating element via the current-limiting power controller.