Static Induction Cooling via Time-Varying Flow Curves
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Solution Overview
Problem
Current cooling methods for static electric induction systems, such as power transformers, rely on constant cooling fluid flow rates, which are insufficient to effectively address heat transfer inefficiencies and hotspot formation due to slow conduction and uneven fluid flow patterns.
Innovation Solution
Implementing a pumping system that varies the cooling fluid flow rate according to a predetermined curve, independent of real-time temperature measurements, to optimize heat transfer and reduce hotspot formation by altering fluid flow paths and stagnant areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a constant cooling fluid flow rate is used, then the cooling system is simple to operate, but hotspots form due to slow heat conduction and uneven fluid flow patterns
Solution Approach 1:
The patent applies periodic action by implementing a predetermined flow rate curve that varies the cooling fluid flow rate over time. This time-varying flow rate creates periodic changes in fluid velocity and flow patterns, which prevents stagnant regions and hotspots from forming while maintaining system reliability without requiring complex real-time control
2Productivity
If the cooling fluid flow rate is increased, then heat transfer efficiency improves, but energy consumption increases
Solution Approach 1:
The patent applies dynamics by transitioning from a static constant flow rate to a dynamic time-varying flow rate defined by a predetermined curve. This dynamic approach allows the system to optimize heat transfer efficiency at different time points while reducing overall energy consumption compared to maintaining a constantly high flow rate
Solution Approach 2:
The patent applies parameter changes by varying the flow rate parameter according to a predetermined curve. This changes the operational state of the cooling system over time, allowing optimization of heat transfer efficiency without requiring continuously high energy input for pumping
3Reliability
If real-time temperature measurements are used to control flow rate, then cooling responds to actual thermal conditions, but measurement and control complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-defining the flow rate curve before operation. This predetermined curve is established in advance based on thermal analysis and system characteristics, eliminating the need for complex real-time temperature measurements and control systems while ensuring appropriate thermal response
Solution Approach 2:
The patent applies self-service by designing a system where the predetermined flow rate curve automatically provides appropriate cooling without requiring external temperature measurements or complex control algorithms. The system uses its own pre-programmed characteristics to self-regulate the cooling process
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 enhances cooling efficiency by varying fluid flow rates to match heat generation rates, reducing hotspot formation and extending the lifespan of static electric induction systems by improving heat transfer coefficients and uniformity.
Implementation Method 1
Heat conduction in the conductor, diffusion from the surface of the conductor to the bulk of the cooling fluid and convection by the fluid stream
Implementation Method 2
convection by the fluid stream
Implementation Method 3
Heat conduction in the conductor, diffusion from the surface of the conductor to the bulk of the cooling fluid
Implementation Method 4
diffusion from the surface of the conductor to the bulk of the cooling fluid
Data Source
Figure 1~3
Figure 4~6
Figure 7
AI summary
The present disclosure relates to a static electric induction system 1. The system comprises a heat generating component 4 and/or 5, cooling fluid 3, a cooling duct 7 along the heat generating component and a pumping system 2 configured for driving the cooling fluid through the cooling duct, wherein the pumping system is configured for applying a varying flow rate of the cooling fluid in the cooling duct along a predetermined flow rate curve.