Alternating-Fin Heat Sink Layout for Natural Convection Cooling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional natural convection cooling (NCC) heat sinks, particularly those with T-shaped cross-section fins, exhibit unsatisfactory thermal performance in blade installation scenarios and are costly to manufacture, due to gaps between secondary fins reducing cooling efficiency and increasing production costs.
Innovation Solution
A heat sink design featuring primary fins with secondary fins arranged such that only every second fin is equipped with a secondary fin, forming gaps between them to guide cooling air directly onto hot surfaces, improving thermal performance and reducing manufacturing complexity and costs by integrating secondary fins into a single metal plate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If secondary fins are added to extend heat transfer surfaces, then thermal performance should improve, but gaps between secondary fins reduce cooling efficiency by preventing direct contact of fresh air with hot surfaces of main fins
Solution Approach 1:
The heat sink is segmented into main fins and secondary fins arranged in a specific pattern where only every second main fin has secondary fins. This segmentation creates alternating open and closed patterns that guide air flow to directly contact hot surfaces while still providing extended heat transfer surfaces.
Solution Approach 2:
Secondary fins are selectively applied only to every second main fin rather than uniformly to all fins. This local differentiation creates specific zones for heat transfer extension while maintaining open channels for direct air contact with hot surfaces in other zones.
2Ease of manufacture
If conventional heat sink designs with T-shaped fins are used, then manufacturing is simplified, but thermal performance in blade installation scenarios is unsatisfactory
Solution Approach 1:
The heat sink design segments the fin structure into main fins and secondary fins with a specific arrangement pattern. This segmentation allows the structure to be manufactured as a single piece while achieving superior thermal performance in blade installation scenarios through the alternating open-closed pattern.
Solution Approach 2:
The design adds a patterned arrangement dimension to the fin structure, where secondary fins are positioned only on every second main fin. This dimensional pattern creates three-dimensional air flow channels that improve thermal performance without complicating the manufacturing process.
3Area of stationary object
If secondary fins are added to all main fins, then heat transfer surface area increases, but manufacturing complexity and costs increase
Solution Approach 1:
The heat transfer surface is segmented into zones with secondary fins and zones without, creating a patterned arrangement. This segmentation achieves sufficient heat transfer area while maintaining manufacturing simplicity through a regular alternating pattern that can be produced as a single piece.
Solution Approach 2:
Instead of adding secondary fins to all main fins (excessive action), the design applies them partially to only every second main fin. This partial application achieves the necessary heat transfer surface area while significantly reducing manufacturing complexity and costs.
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
The design enhances thermal performance by 12% and reduces manufacturing costs, with improved airflow and heat transfer efficiency, especially in challenging blade installation scenarios, while maintaining mechanical strength and ease of production.
Implementation Method 1
The present invention relates generally to the field of heat sinks, particularly natural convection cooling (NCC) heat sinks
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The present invention relates to the technical field of heat sinks, in particular natural convection cooling (NCC) heat sinks. The heat sinks of the invention may be applied, to remote radio units (RRUs) or other devices used in a wireless network. The invention particularly presents a heat sink, a heat sink blade comprising at least one such heat sink, and a method for fabricating the heat sink. The heat sink includes a base, at least three primary fins arranged in a row, wherein each primary fin extends from the base and comprises two lateral faces which face into two opposite lateral directions. Further, the heat sink includes at least two secondary fins formed on the primary fins, wherein each secondary fin extends from one of the primary fins into the two opposite lateral directions associated with that primary fin. Thereby, only every second primary fin in the row of primary fins is provided with a secondary fin.