Solar Thermoelectric Reflector-Radiator for Thermal Gradient Control
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Solution Overview
Problem
Existing solar energy conversion systems using thermoelectric devices face inefficiencies due to limited temperature differences across the TE module, which can lead to overheating and reduced electrical conversion efficiency, especially in terrestrial and space applications where convection or conduction mechanisms are impractical for heat removal.
Innovation Solution
The Concentrated Solar Thermoelectric Power System (C-STEPS) employs a dual-function reflector/radiator component that concentrates solar energy onto the TE module's hot side while using IR radiation to efficiently remove excess heat from the cold side, maintaining a large temperature difference and preventing overheating through passive and active thermal control mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional solar energy conversion systems use thermoelectric devices with limited temperature differences, then the system structure is simpler, but the electrical conversion efficiency is reduced
Solution Approach 1:
The patent combines the reflector and radiator into a single integrated component that performs dual functions: concentrating solar energy onto the TE module hot side and radiating excess heat from the cold side. This merging resolves the contradiction by achieving high temperature difference (improving efficiency) without requiring separate complex systems for concentration and cooling.
Solution Approach 2:
The reflector/radiator component serves multiple functions simultaneously: it acts as a solar concentrator, a heat radiator, and a structural support element. This multi-functionality allows the system to maintain simple structure while achieving the temperature differences necessary for high electrical conversion efficiency.
2Productivity
If the temperature difference across the TE module is increased to improve efficiency, then the electrical conversion efficiency is improved, but the risk of overheating and device damage increases
Solution Approach 1:
The patent converts the harmful excess heat that would cause overheating into a useful function by using the reflector/radiator to actively radiate this heat away from the TE module cold side. The heat that would otherwise be damaging is transformed into the driving force for the radiator's thermal radiation, maintaining large temperature difference while preventing overheating.
Solution Approach 2:
The system establishes a thermal feedback mechanism where the reflector/radiator continuously monitors and adjusts heat removal from the TE module cold side, ensuring the temperature difference remains optimized for efficiency while staying within safe operating limits.
3Loss of energy
If conventional systems rely on convection or conduction for heat removal, then heat transfer is effective, but the system becomes impractical for space applications
Solution Approach 1:
The patent replaces convection and conduction heat transfer mechanisms with thermal radiation as the primary heat removal method. Since radiation does not require a medium (unlike convection) and can operate in vacuum (unlike conduction), this substitution enables the system to function effectively in space applications while maintaining heat transfer effectiveness.
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 configuration enhances the solar energy-to-electricity conversion efficiency by maximizing the temperature difference across the TE module, ensuring safe operating temperatures and optimizing the design for both terrestrial and space applications, while minimizing material costs and system mass.
Implementation Method 1
The basic physical principle of the heat-to-electricity conversion employed by the invention is the Seebeck effect, whereby a temperature difference produces a voltage across a p-n junction
Implementation Method 2
the conversion of concentrated solar energy into electricity and the removal of unconverted excess thermal energy by IR radiation from the primary reflector itself
Data Source
AI summary
The invention, the Concentrated Solar Thermoelectric Power System, herein abbreviated as C-STEPS, is a thermo-optical system configuration for the purpose of achieving a high solar energy-to-electricity conversion efficiency based on thermoelectric (TE) devices that use the Seebeck effect. It does so by implementing a system for concentrated solar energy using a design that combines a dual-function reflector/radiator component with an active or passive heat convection mechanism to ensure that TE module operation is maintained in a safe elevated temperature range with respect to the ambient temperature. Unsafe module temperatures are avoided by automatically adjusting the TE module hot side temperature directly or indirectly by regulating the TE cold side temperature using a variety of passive or active mechanisms, including the reflector/radiator component, phase change material, or convection/conduction mechanisms. A Numerical Design Model is used to optimize the configuration geometry and performance in various terrestrial and space applications and it is a central feature of the invention.