Thermal Management Modeling by Merging Temperature Nodes
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Solution Overview
Problem
The complex structure of automotive thermal management systems results in high computational workload and slow calculation speed for determining coolant outlet temperatures due to numerous circulation nodes, necessitating a more efficient modeling approach.
Innovation Solution
A method for modeling thermal management systems by identifying temperature nodes that cannot be combined and applying a preset combination policy to simplify the system, reducing the number of nodes and improving calculation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a detailed thermal management system model with numerous circulation nodes is used to ensure accuracy, then measurement precision is improved, but device complexity increases and productivity decreases
Solution Approach 1:
The thermal management system model is segmented into multiple circulation nodes, where each node represents a specific component or section (e.g., engine, radiator, battery). This segmentation allows the complex system to be divided into manageable sub-units that can be independently analyzed and combined, maintaining accuracy while enabling modular computation.
Solution Approach 2:
Temperature nodes that share the same temperature value are merged into a single node. The patent identifies and combines equivalent temperature nodes across different circulation loops, reducing the total number of nodes in the model while preserving the thermal relationships and calculation accuracy.
2Measurement precision
If a detailed thermal management system model with numerous circulation nodes is used to ensure accuracy, then measurement precision is improved, but productivity decreases due to slow calculation speed
Solution Approach 1:
The system model is segmented into circulation nodes that can be processed independently. By dividing the calculation into discrete node-level operations, the computational workload is distributed and optimized, improving calculation speed while maintaining the ability to capture detailed thermal behavior.
Solution Approach 2:
Temperature nodes with identical temperature values are merged into single computational units. This reduction in the number of nodes directly decreases the computational complexity and calculation time, thereby improving productivity without sacrificing the accuracy of coolant outlet temperature determination.
3Device complexity
If the thermal management system structure is simplified by combining temperature nodes, then device complexity is reduced and productivity is improved, but measurement precision may deteriorate
Solution Approach 1:
Temperature nodes are merged only when they share the same temperature value, ensuring that the simplification does not compromise accuracy. The patent establishes criteria for node merging that preserve thermal relationships and ensure that merged nodes truly represent equivalent thermal states, thereby maintaining measurement precision.
Solution Approach 2:
Different treatment is applied to different temperature nodes based on their local characteristics. Nodes that require high precision are kept separate, while equivalent nodes are merged. This localized approach ensures that simplification occurs only where appropriate, preserving accuracy in critical regions while reducing complexity elsewhere.
Data Source
AI summary
A method for modeling a thermal management system modeling includes: acquiring a plurality of temperature nodes in a thermal management system and a plurality of branch loops in the thermal management system; determining temperature nodes which are unable to be combined in the thermal management system based on at least one of a heat exchange component in each branch loop or warm water points of coolant in at least two of the plurality of branch loops,; and obtaining a target model corresponding to the thermal management system by combining the plurality of temperature nodes in the thermal management system according to a preset combination policy based on the temperature nodes which are unable to be combined.