Electrocaloric Modular Stack Design for Refrigerant-Free Cooling
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Solution Overview
Problem
Vapor compression refrigerant loops pose environmental hazards and are impractical in settings lacking a ready power source, and alternative cooling technologies like electrocaloric systems face scalability and mass production challenges.
Innovation Solution
A heat transfer system comprising a stack of electrocaloric modules with interlocking electrical bus elements and spacer elements, utilizing electrocaloric films and electrodes to manage fluid flow and heat transfer, allowing for efficient cooling without the need for mechanical compressors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If vapor compression refrigerant loops are used, then cooling effectiveness is achieved, but environmental hazards and power consumption increase
Solution Approach 1:
The patent replaces the mechanical vapor compression system with an electrocaloric system that uses electric fields to induce temperature changes in electrocaloric materials. This substitution eliminates the need for mechanical compressors and refrigerants, thereby removing environmental hazards while maintaining cooling effectiveness through direct electrocaloric heating and cooling cycles.
Solution Approach 2:
The patent utilizes changes in physical parameters of electrocaloric materials - specifically, the temperature change induced by applying and removing electric fields. By cycling the electric field parameters, the system achieves continuous cooling without mechanical compression or harmful refrigerants, resolving the contradiction between cooling effectiveness and environmental impact.
2Reliability
If vapor compression refrigerant loops are used, then cooling effectiveness is achieved, but power consumption and weight increase
Solution Approach 1:
The patent replaces the energy-intensive mechanical compressor with electrocaloric elements that respond directly to electric fields. This substitution dramatically reduces power consumption and weight by eliminating heavy mechanical components while achieving the same cooling effectiveness through solid-state electrocaloric effects.
3Productivity
If electrocaloric modules are stacked to increase cooling capacity, then productivity increases, but device complexity increases
Solution Approach 1:
The patent divides the cooling system into multiple identical modular electrocaloric units that can be stacked vertically. Each module contains complete functional elements (electrocaloric material, electrodes, fluid channels), allowing independent fabrication and assembly. This segmentation enables scaling of cooling capacity while managing complexity through standardization of individual modules.
Solution Approach 2:
The patent merges multiple electrocaloric modules into a single integrated stack where fluid channels and electrical connections are combined across modules. This merging approach achieves increased cooling capacity while reducing overall system complexity by creating a unified structure from standardized components, rather than managing separate independent systems.
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 provides effective cooling without environmental hazards and power demands, enabling scalability and practicality in various applications, including portable cooling and electric vehicles.
Implementation Method 1
an electrocaloric element comprising an electrocaloric film, a first electrode on a first side of the electrocaloric film, and a second electrode on a second side of the electrocaloric film
Data Source
Figure 1
Figure 2~3A
Figure 3B
AI summary
A heat transfer system is disclosed including a plurality of modules arranged in a stack. The stack modules include electrocaloric element and electrodes on each side of the film. A fluid flow path is disposed between two or more electrocaloric elements. A first electrical bus element (18) in electrical contact with the first electrode (14), and a second electrical bus element (20) in electrical contact with second electrode (16). The first electrical bus element is electrically connected to at least one other electrical bus of another electrocaloric element in the stack at the same polarity as said first electrical bus, or the second electrical bus element is electrically connected to at least one other electrical bus of another electrocaloric element in the stack at the same polarity as said second electrical bus.