Staggered Bipolar Plate Cooling Channels for Lower Pressure Drop
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Solution Overview
Problem
Existing bipolar plates in electrochemical reactors experience significant pressure losses in the cooling circuit due to turbulent flow and narrow conduits, which affects the efficiency of both heat transfer and reactive fluid distribution.
Innovation Solution
A bipolar plate design featuring anode and cathode sheets with staggered bosses and depressions, allowing for a cooling circuit with minimal constriction and reduced pressure loss, where the channels and ribs on each sheet are offset to facilitate smooth heat transfer fluid flow without compromising reactive fluid circulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If bosses are arranged in aligned channels in bipolar plates, then the structure is simple to manufacture, but the heat transfer fluid experiences significant pressure drop and turbulent flow
Solution Approach 1:
The patent applies asymmetry by staggering the bosses in the anodic plate relative to the bosses in the cathodic plate, rather than aligning them in straight channels. This asymmetric arrangement creates offset cooling conduits that allow smoother fluid flow and reduce turbulence and pressure drop while maintaining manufacturing simplicity through standard stamping processes
2Length of moving object
If cooling conduits are made narrow to reduce plate thickness, then the device size is reduced, but the pressure drop in the cooling circuit increases significantly
Solution Approach 1:
The patent resolves this contradiction by transitioning from a single-plane channel arrangement to a three-dimensional offset arrangement. The staggered bosses create cooling conduits that extend through the plate thickness in an offset pattern, allowing the conduits to maintain adequate cross-sectional area for low pressure drop while the overall plate thickness remains reduced. This dimensional reorganization allows smooth fluid flow paths that avoid excessive narrowing
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 reduces pressure losses in the cooling circuit by approximately 40% compared to prior art, ensuring efficient heat transfer without narrowing the reactive fluid channels, thus maintaining the overall efficiency of the electrochemical reactor.
Implementation Method 1
cooling conduits for the flow of a heat transfer fluid
Implementation Method 2
circulation of reactive fluids... flow of a heat transfer fluid
Data Source
Figure 1a
Figure 1b
Figure 1c
AI summary
Bipolar plate for an electrochemical reactor, comprising at least one anodic plate (Ta) and one cathodic plate (Tc), each having an inner face (102) and an outer face (101), the anodic (Ta) and cathodic (Tc) plates being in contact with each other via their inner face (102), each anodic (Ta) and cathodic (Tc) plate having on its outer face (101) channels (Cc1, Cc2, Cc3, Cc4, Ca1, Ca2, Ca3, Ca4) for the circulation of reactive fluids, said channels delimiting, at the level of the inner faces of the anodic and cathodic plates, cooling conduits (20) for the flow of a heat transfer fluid, the channels of the anodic and cathodic plates having an alternation of bosses (Ba, Bc) and indentations (Ea, Ec), the bosses of the anodic plate (Ba) being arranged in staggered and the bosses of the cathode ray sheet (Bc) being arranged in a staggered pattern.