Corrugated Fin Heat Exchanger Projections for Airflow Control
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Solution Overview
Problem
The existing corrugated fin type heat exchanger suffers from reduced heat exchange efficiency due to air flow escaping from the edge of the joined portion of the corrugated fin, leading to decreased air flow quantity available for heat exchange.
Innovation Solution
The heat exchanger features a corrugated fin with projections on the ascending and descending surfaces near the top portion, guiding the air flow and preventing it from escaping, while maintaining minimal barrier resistance to airflow, thus enhancing heat exchange efficiency and structural strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a louver or pattern is formed on the flat surface portion of the fin to improve heat exchange efficiency, then heat exchange efficiency is improved, but pressure loss increases and it becomes difficult for wind to flow
Solution Approach 1:
The invention applies different structural features to different regions of the fin. The flat surface portion maintains a smooth surface without louvers to minimize pressure loss, while the top portion (within 50mm from the tip) incorporates protrusions to enhance heat exchange efficiency locally where airflow separation occurs
Solution Approach 2:
The invention uses curved protrusions (with radius of curvature R1 and R2) on the fin surface instead of sharp edges. This curvature design guides airflow smoothly along the fin surface, preventing flow separation and reducing pressure loss while still enhancing heat exchange in the critical top region
2Ease of operation
If the top portions of corrugated fins are arranged separated from one another to allow air circulation and prevent clogging, then airflow circulation is improved and clogging is prevented, but heat exchange efficiency deteriorates due to air flow escaping from the edge
Solution Approach 1:
The invention anticipates the harmful effect of airflow escaping from the fin edge and prevents it in advance by adding protrusions on the top portion of the fin. These protrusions create a barrier that guides airflow to follow the fin surface rather than separating at the edge, thus preventing the loss of heat exchange opportunity while maintaining the separated arrangement for airflow circulation
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 configuration improves heat exchange efficiency by reducing air flow leakage and maintaining low pressure loss, with the projections directing airflow effectively and providing structural reinforcement.
Implementation Method 1
a projection 4 for guiding an air flow, which is parallel to a ridgeline 3a of wave of the corrugated fin, is formed in a location near to the top portion 3c
Implementation Method 2
a corrugated fin type heat exchanger for use mainly in machines for large-scaled working such as machines for mining working and machines for construction working
Implementation Method 3
a plurality of tube elements 5 in which the bottom portions 3b alone of the corrugated fin 3 are joined to each of a pair of the flat surface portions 2a of the flat tube 2
Data Source
AI summary
In a corrugated fin type heat exchanger a flat tube can be replaced, to improve heat exchange performance thereof. A characteristic part of the heat exchanger lies in a projection having been formed on the ascending surface and the descending surface of the corrugated fin of respective tube elements.