Curved Heating Element for Thermoelectric Module Testing
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Solution Overview
Problem
Conventional thermoelectric-module measuring apparatuses are incapable of precisely measuring the properties of curved thermoelectric modules, which are essential for applications in tube-type waste heat sources, as they are designed only for flat thermoelectric modules.
Innovation Solution
A high-temperature structure and system featuring a curved heating element with rod-shaped cartridge heaters, a heat flow meter, temperature sensors, and feedback control to maintain uniform surface temperature and heat conductivity distribution, allowing direct heating and cooling of curved thermoelectric devices for precise property measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional flat thermoelectric module measuring apparatus is used, then the structure is simple and easy to operate, but it cannot measure curved thermoelectric modules which are required for tube-type waste heat sources
Solution Approach 1:
The heating element surface is designed as a curved surface that matches the curvature of the thermoelectric module, allowing direct contact and uniform heating. This curved geometry enables the apparatus to accommodate and measure curved thermoelectric modules effectively, resolving the adaptability issue while maintaining measurement precision
2Temperature
If multiple cartridge heaters are used to heat the curved thermoelectric module, then the heating coverage is improved, but the surface temperature uniformity deteriorates due to uneven heat distribution
Solution Approach 1:
The curved heating element surface is divided into multiple localized heating zones, each served by a separate cartridge heater. This allows independent control of heat input in different regions, enabling uniform temperature distribution across the entire curved surface by adjusting each local zone's heating intensity
Solution Approach 2:
Temperature sensors are positioned to detect surface temperature at multiple locations on the curved heating element. This temperature information is fed back to the control system, which adjusts the power supplied to each cartridge heater to maintain uniform temperature distribution, resolving the contradiction between heating efficiency and temperature uniformity
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
Enables precise measurement of thermoelectric performance by maintaining uniform surface temperature and heat conductivity distribution, overcoming the limitations of conventional systems in measuring curved thermoelectric modules.
Implementation Method 1
a heating element having a surface that is a curved surface coming into contact with a lower end of the curved thermoelectric device, having a plurality of holes for accommodating the plurality of cartridge heaters, and directly heating the lower end of the curved thermoelectric device
Implementation Method 2
a heat flow meter measuring heat conductivity distribution of heat that is outputted from the plurality of cartridge heaters
Implementation Method 3
a temperature sensor measuring surface temperature distribution of the heating element
Data Source
AI summary
Disclosed herein are a high-temperature structure for measuring properties of a curved thermoelectric device, which is capable of precisely measuring the properties of a medium-temperature curved thermoelectric device that is applied to a tube-type waste heat source and is used in research, and a system and a method for measuring the properties using the same. The high-temperature structure may include a plurality of rod-shaped cartridge heaters, and a heating element having a surface that is a curved surface coming into contact with a lower end of the curved thermoelectric device, having a plurality of holes for accommodating the plurality of cartridge heaters, and directly heating the lower end of the curved thermoelectric device.