Electrochemical System Segmented Circulation Lines
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Solution Overview
Problem
Existing electrochemical systems face challenges in optimizing the flow rate and pressure of the liquid reaction fluid supplied to both the water electrolysis stack and the property processing unit, leading to difficulties in maximizing performance, efficiency, and durability.
Innovation Solution
The system employs separate circulation lines for the water electrolysis stack and the property processing unit, with dedicated pumps for each line, allowing for independent optimization of flow rate and pressure. This configuration ensures that the conditions for each component are met, enhancing overall system performance and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single pump is used to circulate liquid reaction fluid through both the water electrolysis stack and property processing unit in series, then the system structure is simplified, but the flow rate and pressure conditions for each component cannot be independently optimized
Solution Approach 1:
The circulation system is divided into two separate circulation lines: a first circulation line for the water electrolysis stack and a second circulation line for the property processing unit. Each line has its own dedicated pump, allowing independent optimization of flow rate and pressure conditions for each component while maintaining overall system functionality.
2Productivity
If high pressure and flow rate are supplied to the water electrolysis stack to increase output, then the stack performance is improved, but the ion exchange efficiency of the ion filter deteriorates
Solution Approach 1:
By separating the circulation into two independent lines with separate pumps, the system can supply high pressure and flow rate to the water electrolysis stack while simultaneously maintaining lower, optimized conditions for the ion filter, thus preventing deterioration of ion exchange efficiency.
3Productivity
If high pressure and flow rate are supplied to the water electrolysis stack, then the output is increased, but deformation and deterioration in durability of the heat exchanger occur
Solution Approach 1:
The separate circulation lines allow the heat exchanger in the second circulation line to operate under independently optimized conditions, protecting it from the high pressure and flow rate conditions in the first circulation line, thereby preventing deformation and deterioration.
4Device complexity
If a single pump is used for both circulation lines, then the device complexity is reduced, but the pump size and load increase
Solution Approach 1:
Instead of using one large pump to handle both circulation lines, the system employs two smaller, dedicated pumps - a first pump for the water electrolysis stack circulation line and a second pump for the property processing unit circulation line. This segmentation reduces the size and load of each individual pump while maintaining overall system capability.
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 approach improves ionic conduction and ion exchange efficiency, optimizes temperature adjustment, reduces pump size and load, minimizes power consumption, and enhances the durability of the property processing unit, while simplifying the system structure and improving spatial utilization.
Implementation Method 1
a gas-liquid separator configured to separate a reaction fluid into a gaseous reaction fluid and a liquid reaction fluid
Implementation Method 2
a first pump provided in the first circulation line
Implementation Method 3
a water electrolysis stack provided in the first circulation line
Implementation Method 4
a second pump provided in the second circulation line
Implementation Method 5
an ion filter configured to remove (filter out) ions from the liquid reaction fluid
Implementation Method 6
a heat exchanger for adjusting a temperature of the liquid reaction fluid
Data Source
AI summary
An electrochemical system includes: a gas-liquid separator configured to separate a reaction fluid into a gaseous reaction fluid and a liquid reaction fluid; a first circulation line connected to the gas-liquid separator and configured to circulate the liquid reaction fluid; a water electrolysis stack provided in the first circulation line; a first pump provided in the first circulation line; a second circulation line connected to the gas-liquid separator in parallel with the first circulation line and configured to circulate the liquid reaction fluid; a property processing unit provided in the second circulation line and configured to process properties of the liquid reaction fluid; and a second pump provided in the second circulation line, thereby reducing a load of the pump and improving efficiency of the system.