Rotating Gas Heat Transfer for Artificial Temperature Gradients
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Solution Overview
Problem
Current power plants using Carnot or steam cycles face inefficiencies in generating a high temperature medium for work production, as they rely on natural temperature differences that are limited by environmental conditions and conventional heat transfer methods.
Innovation Solution
The process employs artificial gravity and a rotating drum with a compressible gas, such as Xenon, to create a high temperature gradient by mixing fluid segments radially and using heat exchangers positioned near the axis of rotation, enhancing heat conduction and pressure differences to improve efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional heat transfer methods are used in power plants, then heat can be transferred from high temperature medium to low temperature source, but the temperature difference is limited by environmental conditions and efficiency is reduced
Solution Approach 1:
The patent changes the physical parameters of the system by introducing a rotating reference frame and artificial gravity field. The fluid is subjected to centrifugal forces that create a pressure gradient, which in turn creates a temperature gradient through the thermodynamic relationship between pressure and temperature. This allows achieving temperature differences much larger than what is possible with conventional environmental heat sinks.
Solution Approach 2:
The system transitions from a static heat transfer process to a dynamic one by rotating the drum containing the fluid. The rotation creates time-varying centrifugal forces that establish a stable temperature gradient in the rotating frame. The heat exchangers are positioned to exploit this dynamic temperature distribution, with one at the axis (colder) and one at the periphery (hotter).
2Temperature
If heat exchangers are positioned at the axis of rotation, then heat can be extracted from the cold medium, but the temperature gradient across the fluid is insufficient without artificial gravity
Solution Approach 1:
The patent introduces an intermediary mechanism - the rotating drum with artificial gravity - that mediates between the heat exchangers and the fluid. This intermediary creates the necessary temperature gradient by subjecting the fluid to centrifugal forces, allowing heat extraction at the axis and heat rejection at the periphery without requiring complex external temperature control systems.
3Loss of energy
If fluid segments are mixed radially to obtain constant entropy, then heat conduction within the fluid is improved, but the process complexity increases
Solution Approach 1:
The patent employs periodic mixing action within the rotating fluid to maintain constant entropy in radial segments. The mixing is performed periodically to redistribute thermal energy and eliminate temperature stratification within each radial segment, thereby improving heat conduction efficiency. This periodic action is integrated into the existing rotation mechanism, avoiding the need for separate complex mixing 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 temperature difference across the fluid, allowing for more efficient heat conversion into work, potentially doubling the efficiency of heat-to-work conversion compared to traditional methods.
Implementation Method 1
Under the influence of an external force, a temperature difference is established in a gas. By using centrifugal forces and with gases of high molecular weight, this effect is increased to such an extent that it is of interest for technical use.
Implementation Method 2
heat conduction and hence efficiency increases with the pressure and density of the fluid
Implementation Method 3
heat can be extracted from the first, relatively cold medium to the second, relatively hot medium by means of a heat exchanger at the periphery of the drum
Implementation Method 4
segments, defined in radial direction, of the fluid are thoroughly mixed to obtain an at least substantially constant entropy in these segments and thus improved heat conduction within the fluid
Implementation Method 5
heat conduction and hence efficiency increases with the pressure and density of the fluid. Thus, pressure is preferably in excess of 10 bar (at the axis of rotation)
Data Source
Figure 1~3
Figure 4~5
AI summary
The invention relates to a process of transferring heat from a first relatively cold medium (23) to a second relatively hot medium (22), comprising the steps of rotating a contained amount (6) of a compressible fluid about an axis of rotation, thus generating a radial temperature gradient in the fluid, and heating the second medium (22) by means of the fluid in a section of the fluid relatively far from the axis of rotation. The invention also pertains to an apparatus for carrying said process.