Systems and methods for operating a thermoelectric module to increase efficiency
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Solution Overview
Problem
Vapor compression based refrigeration systems face inefficiencies due to excessive cooling capacity, premature component failure from large current surges, and difficulty in precisely controlling temperature within a cooling chamber, leading to sub-optimum efficiency and excessive wear.
Innovation Solution
A method of operating a thermoelectric module that dynamically adjusts power based on system parameters such as ambient temperature and temperature of the cooling chamber to maximize the coefficient of performance, involving determining and providing first and second amounts of power to optimize efficiency and mitigate heat rejection limitations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If vapor compression based refrigeration systems use duty cycle control to manage cooling capacity, then the system can handle transient demand, but large current surges occur during start-up causing component wear and premature failure
Solution Approach 1:
The patent applies dynamics by making the thermoelectric module's power input adjustable and responsive to changing operating conditions. The controller dynamically modifies the electrical power supplied to the thermoelectric modules based on real-time temperature measurements and system state, enabling smooth transitions during start-up and transient periods without abrupt current surges, thereby improving reliability while maintaining adaptability.
Solution Approach 2:
The patent changes the operating parameters of the thermoelectric modules by adjusting the electrical power input according to system conditions. By varying the power parameter dynamically rather than using fixed duty cycle control, the system avoids large current surges during start-up while still responding effectively to transient demand, resolving the contradiction between adaptability and reliability.
2Measurement precision
If vapor compression based refrigeration systems activate continuously to maintain temperature below a certain value, then temperature control is achieved, but efficiency decreases due to excessive cooling capacity and large control bands
Solution Approach 1:
The patent implements feedback control by continuously monitoring the temperature within the cooling chamber and using this information to adjust the electrical power supplied to the thermoelectric modules. The controller compares the measured temperature with the desired setpoint and dynamically modifies power input to maintain precise temperature control while minimizing energy consumption, eliminating the need for large control bands and excessive cooling capacity.
Solution Approach 2:
The system uses dynamic power adjustment based on real-time temperature feedback, allowing precise temperature control without the inefficiencies of continuous activation. The thermoelectric modules' power input is continuously adapted to match the actual cooling demand, improving efficiency while maintaining measurement precision through responsive control.
3Productivity
If thermoelectric modules operate at maximum cooling capacity to meet heat extraction demands, then cooling performance is improved, but coefficient of performance decreases due to heat rejection limitations
Solution Approach 1:
The patent applies dynamics by continuously adjusting the electrical power supplied to the thermoelectric modules based on actual cooling demands and system conditions. Rather than operating at maximum capacity continuously, the system dynamically optimizes power input to maintain appropriate temperature differentials across the modules, improving coefficient of performance while still meeting heat extraction demands through responsive control.
Solution Approach 2:
The system changes the operating parameters of the thermoelectric modules by adjusting electrical power input according to real-time conditions. This dynamic parameter adjustment allows the modules to operate at optimal efficiency points rather than maximum capacity, resolving the contradiction between productivity and energy loss by adapting power levels to actual cooling needs and heat rejection capabilities.
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 enhances the efficiency of thermoelectric modules by optimizing power usage, reducing wear, and improving temperature control within the cooling chamber, thereby addressing the inefficiencies and limitations of vapor compression systems.
Implementation Method 1
A thermoelectric module may be used to extract heat from a cooling chamber
Data Source
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AI summary
Systems and methods for operating a thermoelectric module to increase efficiency are disclosed. In some embodiments, a method of operating a thermoelectric module includes determining a first amount of power that would maximize a coefficient of performance of the thermoelectric module based on one or more system parameters and providing the first amount of power to the thermoelectric module. The method also includes determining that at least one of the one or more system parameters has changed, determining a second amount of power that would maximize the coefficient of performance of the thermoelectric module based on the one or more system parameters, and providing the second amount of power to the thermoelectric module. In some embodiments, adjusting the amount of power provided based on the one or more system parameters increases the efficiency of the thermoelectric module.