Liquid Cooling Cold Plate Flow Re-Allocation for Uneven Heat Loads
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Solution Overview
Problem
Existing liquid cooling cold plates struggle with inefficient heat dissipation due to non-optimized fluid channels, leading to large temperature differences between high and low heat flux density wafers, risking overtemperature in high heat flux components.
Innovation Solution
A liquid cooling cold plate design with re-allocation modules that adjust fluid flow rates by using regions of varying fluid resistance to match heat dissipation requirements of different sub-regions, simplifying fluid channel design and improving heat dissipation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a liquid cooling cold plate with sparse and dense fins or independent fluid channel design is used for different heat sources, then heat dissipation requirements of different heat sources can be met, but the fluid channel design becomes complex
Solution Approach 1:
The cold plate is divided into multiple heat dissipation regions, each with its own fluid channel. Each region is independently designed to match the heat dissipation requirements of the corresponding heat source, allowing for simplified local designs rather than a complex unified system.
Solution Approach 2:
Different heat dissipation regions are designed with different fluid channel characteristics (such as channel width, depth, or fin density) to match the local heat flux density of each heat source. This allows each region to have optimized local properties rather than using a uniform complex design throughout.
2Ease of manufacture
If a non-optimized fluid channel design is used in existing liquid cooling cold plates, then manufacturing is simpler, but temperature difference between heat sources with different heat flux densities becomes large causing overtemperature risk
Solution Approach 1:
The fluid channel design incorporates local variations in channel dimensions or fin density to match the heat flux distribution of different heat sources. This ensures that regions with higher heat flux receive more cooling capacity, maintaining temperature uniformity across all heat sources while keeping the overall manufacturing process relatively simple.
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 effectively manages fluid flow to meet varying heat dissipation needs, reducing temperature differences and enhancing heat removal capabilities across components with diverse heat generation profiles.
Implementation Method 1
a re-allocation module is disposed between at least two adjacent fluid channels. Fluid in a fluid channel located upstream of the re-allocation module is converged by using the re-allocation module, and the converged fluid is distributed to a downstream fluid channel by using the re-allocation module
Implementation Method 2
a liquid cooling cold plate is provided, where the liquid cooling cold plate is applied to a communications device, and is configured to dissipate heat for an electronic component in the communications device
Data Source
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AI summary
This application provides a liquid cooling cold plate and a communications device. The liquid cooling cold plate includes a housing and at least two heat dissipation regions arranged on the housing in a flow direction of fluid. Heat sources disposed in the heat dissipation regions have different heat dissipation requirements, and a fluid channel corresponding to each heat dissipation region is disposed in the housing. To facilitate fluid flow and meet different flow rate requirements of different heat dissipation regions, according to the liquid cooling cold plate provided in this application, a re-allocation module is disposed between at least two adjacent fluid channels. Fluid in a fluid channel located upstream of the re-allocation module is converged by using the re-allocation module, and the converged fluid is distributed to a downstream fluid channel by using the re-allocation module It can be learned from the foregoing description that, the fluid in the upstream fluid channel is converged by using the re-allocation module, and the entire converged fluid is re-allocated to a downstream heat dissipation region, so that corresponding flow rates can be provided to regions with different heat dissipation requirements in the downstream heat dissipation region.