Header Tank Ribs for Uniform Heat Exchanger Flow
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Solution Overview
Problem
Existing header tanks for heat exchangers suffer from uneven flow rates of heat exchange fluid into tubes due to ribs blocking the flow, leading to reduced fluid supply on the back side and non-uniform distribution.
Innovation Solution
A header tank design with ribs that project more into the tank as they move away from the inlet, intersecting with the central axis direction, ensuring uniform flow distribution by redirecting the fluid into adjacent tubes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If ribs are formed to block the flow of heat exchange fluid, then the heat exchange fluid is directed into tubes, but the flow rate of heat exchange fluid to the back side of the ribs decreases and flow distribution becomes non-uniform
Solution Approach 1:
The ribs are designed with asymmetric projection lengths where ribs closer to the inlet part project less into the header tank while ribs farther from the inlet part project more. This asymmetric configuration compensates for the natural flow distribution pattern, ensuring uniform flow rates to all tubes despite the blocking effect of the ribs.
Solution Approach 2:
Different ribs have different projection lengths tailored to their specific positions in the header tank. Ribs at different locations project different distances into the tank based on local flow requirements, creating locally optimized flow distribution rather than a uniform rib structure throughout.
2Ease of operation
If ribs project into the header tank to redirect fluid flow, then fluid is directed into tubes, but flow rate reduction occurs on the back side of the ribs
Solution Approach 1:
The asymmetric rib design with varying projection lengths optimizes flow direction control while minimizing flow rate reduction. By adjusting each rib's projection distance according to its position, the system maintains effective flow redirection to tubes while preserving overall heat exchange productivity.
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 ensures a uniform flow rate of heat exchange fluid into each tube, preventing reduction in flow rate and enhancing overall fluid distribution efficiency.
Implementation Method 1
a plurality of ribs projecting into the header tank, extending in directions intersecting with a central axis direction of the inlet part, arranged side by side in the central axis direction and configured to cause the heat exchange fluid to flow into the tubes
Data Source
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AI summary
A header tank for a heat exchanger for supplying a heat exchange fluid to a core unit in which a plurality of tubes are provided side by side includes an inlet part for introducing the heat exchange fluid into the header tank, and a plurality of ribs projecting into the header tank, extending in directions intersecting with a central axis direction of the inlet part, arranged side by side in the central axis direction and configured to cause the heat exchange fluid to flow into the tubes. The plurality of ribs project more into the header tank with increasing distance from the inlet part.