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Solution Overview
Problem
Conventional vapor compression refrigeration cycles are inefficient, consuming 30% of household energy and lacking in thermal management capabilities for electronic circuits, while electrochemical compressors with 'n' numbers limited to 1 fail to maximize water transport and efficiency.
Innovation Solution
Incorporating a working fluid with a flow component that increases the 'n' number by making the electrode or ion conducting media hydrophilic, using additives like alcohols or formic acid, and employing higher conductance, thinner membranes reinforced with substrates to enhance water transport and compression performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional vapor compression refrigeration cycles are used, then the system can achieve refrigeration, but energy consumption increases significantly (30% of household energy)
Solution Approach 1:
The patent replaces the mechanical compressor with an electrochemical compressor that uses electrochemical reactions to compress the working fluid. This substitution eliminates the need for mechanical moving parts and reduces energy consumption by utilizing electrochemical potential differences to drive the compression process, directly addressing the high energy loss in conventional vapor compression systems
Solution Approach 2:
The patent changes the fundamental operating parameters by using electrochemical reactions instead of mechanical work to achieve compression. The electrochemical compressor operates based on electrochemical potential gradients and ionic transport, fundamentally altering the energy conversion mechanism from mechanical to electrochemical, thereby improving overall system efficiency
2Productivity
If electrochemical compressors with n=1 are used, then the system can transport water, but water transport efficiency and compression performance are limited
Solution Approach 1:
The patent changes the n-number parameter from 1 to greater than 1 by modifying the electrochemical cell design and operating conditions. This parameter change enables multiple water molecules to be transported per ion, significantly increasing water transport efficiency and compression performance without requiring proportional increases in energy input
Solution Approach 2:
The patent employs composite working fluids containing both polar species (water) and ion-forming gases (hydrogen), creating a synergistic system where the ion-forming component enhances water transport through electrochemical reactions. This composite approach allows the system to achieve n>1 by leveraging the combined properties of different substances
3Volume of moving object
If mechanical compressors are used, then the system can achieve compression, but the device size becomes large and thermal management capabilities for electronic circuits are insufficient
Solution Approach 1:
The patent replaces the bulky mechanical compressor with a compact electrochemical compressor that has no moving parts. This substitution dramatically reduces device size while enabling versatile thermal management applications, including cooling of electronic circuits, due to the precise control and modular nature of electrochemical compression
Solution Approach 2:
The electrochemical compressor serves multiple functions: it compresses the working fluid for refrigeration cycles, provides precise thermal management for electronic circuits, and can be scaled to different sizes for various applications. This multi-functionality replaces the need for separate mechanical compression systems and dedicated thermal management devices
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 significantly increases the efficiency of electrochemical compressors, allowing for higher water transport and improved thermal management, making them more suitable for refrigeration systems and reducing energy consumption.
Implementation Method 1
a flow component that increases the transport of water or polar species through the ion conducting media and increases compression performance... by making the electrode or ion conducting media hydrophilic
Implementation Method 2
electrochemical compressors that employ a working fluid having flow component that increases the transport of water or polar species through the ion conducting media
Data Source
AI summary
A high water transfer electrochemical compressor is described having a ‘n’ transfer of water through the ion conducting membrane of greater than one. This may be accomplished by reducing the equivalent weight of the ion conducting polymer, such as an ionomer to less than about 900 and/or by reinforcing the low equivalent weight ionomer with a support material, such as an expanded polytetrafluoroethylene. This may be accomplished by making components of the electrochemical cell hydrophilic including the electrodes and/or gas diffusion media. This may be accomplished by adding a flow component to a feed fluid or refrigerant, such as an alcohol, acid, or acetone, for example. A flow component may modify an electrode and/or the ion conducting media, by rendering them hydrophilic. A flow component may swell an ion conducting media enable high transport of the working fluid.