Magnetocaloric Thermal Generator With Stable Temperature Gradient
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Solution Overview
Problem
Magnetic refrigeration generators face limitations in useful calorific power and efficiency, leading to unstable thermal behavior and limited industrial or domestic applications due to variable temperature gradients and dependence on external energy transfer conditions.
Innovation Solution
A thermal generator design that includes a magnetocaloric element with controlled thermal energy transfer means to maintain a stable temperature gradient, limiting energy exchange to ensure efficient operation independent of external conditions, using synchronized heat transfer fluid movement and magnetic field variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the heat transfer surface is increased using fins at hot and cold ends, then the quantity of calories and cold transferred increases, but the efficiency drops due to excessive energy extraction causing weak and variable temperature gradient
Solution Approach 1:
The patent applies local quality by providing fins only at specific locations (hot and cold ends) rather than uniformly across the entire heat transfer surface. This localized fin configuration concentrates heat transfer enhancement where most needed while preserving temperature gradient stability in the magnetocaloric element core, thus balancing productivity improvement with efficiency maintenance.
2Stability of the object's composition
If the generator is totally thermally isolated from external environment, then thermal stability is improved, but the thermal restitution capacity becomes too low and variable for industrial or domestic application
Solution Approach 1:
The patent implements dynamics by transitioning from static total thermal isolation to a dynamic controlled thermal exchange system. The generator maintains thermal stability through active control mechanisms that regulate heat transfer to external applications, allowing the system to adaptively balance stability maintenance with sufficient thermal restitution capacity for practical applications.
3Adaptability or versatility
If conventional heat exchange means are used with external application, then adaptability to different applications is improved, but efficient operation cannot be guaranteed under varying conditions
Solution Approach 1:
The patent incorporates feedback mechanisms in the heat exchange system that continuously monitor thermal conditions and adjust heat transfer rates accordingly. This feedback control enables the generator to maintain efficient operation across varying external conditions while remaining adaptable to different applications, as the system automatically compensates for changes in thermal demand or environmental conditions.
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 solution ensures a stable and maintained temperature gradient, enhancing thermal efficiency and making the generator suitable for industrial and domestic applications by controlling thermal energy transfer through specific heat exchange interfaces and materials.
Implementation Method 1
a magnetic arrangement (7) arranged to alternately subject each magnetocaloric element (4) to a magnetic field variation and create alternately in each magnetocaloric element (4) a heating cycle and a cooling cycle
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3A~3B
AI summary
The present invention relates to a thermal generator (1) comprising at least one thermal module (3) essentially comprising a magnetocaloric element (4) through which a heat-transfer fluid flows alternately between two chambers (5, 6) placed on either side of said magnetocaloric element (4), and a means (8, 9) for transferring thermal energy between the heat-transfer fluid of at least each chamber and at least one application or the external environment. This generator is characterized in that the thermal energy transfer means comprises at least one structural element for controlled heating or cooling, preventing an uncontrolled reduction in the temperature gradient in each magnetocaloric element (4) and ensuring a minimum value of the temperature gradient inside each thermal module (3), the overall heat transmission coefficient of each structural element (8, 9) being determined according to the heat transmission coefficient at each interface between each magnetocaloric element (4) and each structural element (8, 9).