Split Heat Exchanger Sections for Multi-Temperature Vehicle Cooling
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Solution Overview
Problem
Current motor vehicle cooling systems with a single low-temperature heat exchanger and outlet nozzle are insufficient in cooling certain equipment to optimal temperatures, leading to degraded performance in air-conditioning and other critical systems.
Innovation Solution
The heat-exchange surface of the equipment exchanger is split into multiple sections with varying flow rates of heat-transfer fluid, allowing for multiple heat-exchange levels and improved cooling efficiency by utilizing multiple outlet nozzles to manage fluid temperature effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single low-temperature heat exchanger with one outlet nozzle is used, then the device complexity is reduced, but the cooling efficiency and temperature reduction capability are insufficient
Solution Approach 1:
The heat-exchange surface of the equipment exchanger is split into multiple sections (first heat-exchange section and second heat-exchange section), each receiving heat-transfer fluid at different flow rates. This segmentation allows the system to create multiple heat-exchange levels, enabling more effective cooling to lower temperatures while maintaining manageable structural complexity through systematic division of the cooling function.
2Temperature
If the heat-exchange surface is split into multiple sections with varying flow rates, then the cooling efficiency and temperature reduction are improved, but the device complexity increases
Solution Approach 1:
Different sections of the heat-exchange surface are assigned different local qualities by varying the flow rate of heat-transfer fluid through each section. The first heat-exchange section receives a higher flow rate for primary cooling, while the second heat-exchange section receives a lower flow rate for secondary cooling. This local differentiation optimizes cooling efficiency at each stage without requiring complete system redesign.
Solution Approach 2:
The system implements dynamic flow rate distribution across multiple heat-exchange sections, where the heat-transfer fluid flow is dynamically divided into different rates for different sections. This dynamic approach allows the system to adaptively optimize cooling performance across multiple temperature levels, achieving superior cooling efficiency while managing complexity through controlled fluid dynamics rather than mechanical complexity.
3Ease of operation
If a single flow rate of heat-transfer fluid is used, then the system is simpler to operate, but the cooling performance at critical points is insufficient
Solution Approach 1:
The system applies partial action by dividing the heat-transfer fluid flow into different flow rates for different heat-exchange sections rather than applying uniform flow throughout. The first heat-exchange section receives excessive flow relative to what a single-section system would provide, ensuring adequate cooling capacity, while the second section receives reduced flow for fine-tuned temperature control. This partial differentiation approach maintains operational simplicity while significantly improving cooling reliability at critical points.
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 configuration enables the heat-transfer fluid to be cooled to multiple temperature levels, significantly reducing the temperature of the fluid passing through the equipment exchanger, thereby enhancing the efficiency of components like air-conditioning condensers and intercoolers.
Implementation Method 1
a low-temperature heat exchanger and at least an equipment exchanger (102) comprising a heat-exchange surface
Implementation Method 2
heat-exchange surface of the equipment exchanger is split between at least a first and a second heat-exchange section
Implementation Method 3
through which a heat-transfer fluid circulates
Data Source
AI summary
The invention relates to a system which is used to cool at least one piece of motor vehicle equipment to a low temperature, comprising a heat transfer fluid circulation loop. According to the invention, a low-temperature heat exchanger (60) and at least one equipment exchanger (102) are mounted to the aforementioned circulation loop. The heat exchange surface of the equipment exchanger (102) is divided into at least first and second heat exchange sections (104, 106). A first flow (Q<SB>1</SB>) of heat-transfer fluid passes through the first heat exchange section (104), while a second smaller flow (Q2) passes through the second section. The invention is suitable for motor vehicle heat exchangers.