Expansion Radiator Flow Guidance for Transformer Cooling
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Solution Overview
Problem
Conventional expansion radiators for electrical transformers are costly to manufacture and have limited cooling efficiency due to structural constraints, leading to increased operating temperatures and material fatigue from volume fluctuations in the transformer oil.
Innovation Solution
The expansion radiator features flow guiding parts in the orifice region that direct the heat exchange fluid towards the outer edge of the expansion corrugation, enhancing the cooling effect and reducing material stress, while being inexpensive to manufacture by using a single corrugated sheet with a cover sheet, allowing for efficient heat dissipation and reduced bulging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the heat exchange fluid flows obliquely downward into the cavity of the expansion corrugation without flow guidance, then the structure is simple, but the upper part of the corrugated sheet contributes only to a reduced extent to the cooling effect
Solution Approach 1:
The flow guiding part is integrated directly into the collector structure, merging the flow guidance function with the existing collector component. This eliminates the need for separate flow guidance components while still achieving the desired flow direction control to improve cooling efficiency.
Solution Approach 2:
The flow guiding part acts as an intermediary element between the collector and the expansion corrugation cavity. It mediates the fluid flow by directing it horizontally toward the outer edge, ensuring optimal utilization of the corrugated sheet surface for heat exchange.
2Temperature
If conventional expansion radiators are used with limited cooling efficiency, then manufacturing costs are reduced, but operating temperatures increase and material fatigue increases
Solution Approach 1:
The invention changes the flow direction parameter from oblique downward flow to horizontal flow along the outer edge of the expansion corrugation. This parameter change optimizes the cooling efficiency by ensuring uniform heat exchange across the entire corrugated surface, thereby reducing operating temperatures without increasing manufacturing complexity.
3Productivity
If the expansion radiator handles greater volume fluctuations, then the cooling capacity is improved, but material fatigue and stress of joints increase
Solution Approach 1:
The flow guiding part creates localized optimal flow conditions at the outer edge of the expansion corrugation, ensuring that the cooling effect is maximized in the region where it is most needed. This localized optimization allows the system to handle greater volume fluctuations efficiently while distributing stress more uniformly across the structure.
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 design achieves a better cooling effect, lowering the operating temperature of the transformer oil, reducing volume fluctuations, and minimizing material fatigue, thus extending the service life and reducing manufacturing costs.
Implementation Method 1
heat exchange fluid is supplied via an inflow means, passed through an expansion corrugation cavity formed by an expansion corrugation and an associated cover part, and then drained via outflow means
Data Source
AI summary
An expansion radiator for a hermetically closed electrical transformer or a throttle. A heat exchange fluid is delivered to the radiator via an inflow, passed through an expansion shaft cavity formed by an expansion shaft and an associated cover part, and then drained off via an outflow. A flow guiding part which steers a flow direction of the heat exchange fluid is arranged in a mouth region between the inflow and the expansion shaft cavity.