Electrochemical Climate Control Heat Rejection Loop Without a Condenser
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Solution Overview
Problem
Conventional climate control systems, relying on mechanical compressors, have inefficiencies that exceed theoretical Carnot heat pumping limits, leading to significant energy consumption and greenhouse gas emissions, necessitating the development of more efficient cooling and heating solutions.
Innovation Solution
An electrochemical climate control system utilizing an electrochemical device with a reversible hydrogenation and dehydrogenation reaction process, where a working fluid undergoes phase changes without a condenser, and a recirculation loop for heat rejection, maintaining the working fluid temperature below 100°C and achieving temperature reductions of at least 5°C to 18°C through a heat exchanger.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a mechanical compressor is used in a conventional vapor compression cycle system, then the system can circulate and pressurize refrigerant between heat exchangers, but the system efficiency falls significantly below theoretical Carnot heat pumping limits, leading to high energy consumption
Solution Approach 1:
The patent replaces the mechanical compressor with an electrochemical device that uses electrochemical reactions (hydrogenation/dehydrogenation) to compress and circulate the working fluid. This substitution eliminates the mechanical moving parts and associated inefficiencies, allowing the system to approach Carnot heat pumping limits and significantly reduce energy consumption.
Solution Approach 2:
The patent changes the fundamental operating parameters by using electrochemical potential differences to drive fluid circulation instead of mechanical compression. The electrochemical device operates by changing the chemical state of the working fluid through hydrogenation and dehydrogenation reactions, which naturally drive fluid flow and pressure changes without mechanical input, thereby improving energy efficiency.
2Reliability
If the working fluid temperature is not controlled in the electrochemical device, then the reaction process can proceed, but high temperatures may damage system components
Solution Approach 1:
The patent introduces a heat exchanger as an intermediary component between the electrochemical device and the working fluid circulation system. This heat exchanger actively removes excess heat from the working fluid, maintaining temperature below 100°C and preventing component damage while allowing the electrochemical reactions to proceed efficiently.
Solution Approach 2:
The system implements temperature monitoring and control through the heat exchanger, which continuously removes heat to maintain the working fluid temperature below 100°C. This feedback control ensures that the electrochemical device operates within safe temperature limits, protecting components from thermal damage while maintaining reaction efficiency.
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
The system enhances energy efficiency by reducing energy consumption and greenhouse gas emissions, achieving effective cooling and heating while avoiding high temperatures that could damage components, thus improving overall system performance and feasibility for commercial and residential use.
Implementation Method 1
The working fluid has a composition that undergoes a reversible hydrogenation and dehydrogenation reaction when it passes through the electrochemical device when a potential is applied thereto
Implementation Method 2
The working fluid has a composition that undergoes a reversible hydrogenation and dehydrogenation reaction when it passes through the electrochemical device when a potential is applied thereto
Implementation Method 3
A second heat exchanger is configured to cool a portion of the working fluid exiting the electrochemical device for heat rejection from the electrochemical device
Implementation Method 4
A recirculation pump circulates the portion of the working fluid exiting the electrochemical device through the second heat exchanger and back to an inlet of the electrochemical device
Data Source
AI summary
A climate control system includes an electrochemical device in fluid communication with at least one fluid conduit that also includes a first heat exchanger, an expansion device, and a pump, but may be free of any condensers. A working fluid is circulated in the fluid conduit that has a composition that undergoes a reversible hydrogenation and dehydrogenation reaction when it passes through the electrochemical device when a potential is applied thereto. The climate control system includes a heat rejection system in the form of a recirculation loop having a second heat exchanger configured to cool a portion of the working fluid exiting the electrochemical device and a recirculation pump that circulates the portion of the working fluid exiting the electrochemical device through the second heat exchanger and back to an inlet of the electrochemical device. Methods for rejecting heat from an electrochemical climate control system are also provided.