Engine Cooling Baffle Parallel Heat Exchanger Flow
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Solution Overview
Problem
Series-type cooler configurations in engine cooling systems degrade the efficiency of subsequent heat exchangers due to increased coolant temperature, as coolant is warmed by the first heat exchanger before reaching the second heat exchanger in the series.
Innovation Solution
A coolant guide or baffle is designed to direct coolant flow such that a substantial portion of the coolant entering the system flows around the first heat exchanger and then up into the second heat exchanger, maintaining coolant at a lower temperature and maximizing the efficiency of each heat exchanger.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If coolant is directed through heat exchangers connected in series, then the cooling system can cool engine fluids, but the efficiency of subsequent heat exchangers is degraded due to increased coolant temperature
Solution Approach 1:
The cooling system is segmented into multiple parallel coolant flow paths rather than a single series path. The coolant distribution manifold divides the incoming coolant into separate channels, allowing each heat exchanger to receive cooler coolant independently. This segmentation prevents the cumulative temperature increase that occurs in series configurations, maintaining higher cooling efficiency across all heat exchangers.
Solution Approach 2:
The patent transitions from a one-dimensional series arrangement to a multi-dimensional parallel architecture using a three-dimensional coolant distribution manifold. The manifold creates vertical and horizontal flow paths that distribute coolant simultaneously to multiple heat exchangers, adding spatial dimensions to the coolant flow configuration. This dimensional change enables independent cooling zones while maintaining compact packaging.
2Area of stationary object
If multiple heat exchangers are located close together to maximize space efficiency, then space utilization improves, but uniform cooling among heat exchangers becomes difficult to achieve
Solution Approach 1:
The coolant distribution manifold is designed with locally optimized flow channels that account for the specific positioning and thermal characteristics of each heat exchanger. Different sections of the manifold have tailored geometries, passage sizes, and flow resistance characteristics to deliver uniform coolant distribution despite the compact, non-uniform arrangement of heat exchangers. This local customization ensures each heat exchanger receives appropriate coolant flow for uniform cooling performance.
3Reliability
If coolant flow path is extended to reach multiple heat exchangers in series, then all heat exchangers can be cooled, but system restrictions increase and cooling performance decreases
Solution Approach 1:
The coolant distribution manifold performs preliminary action by distributing coolant to multiple heat exchangers simultaneously at the beginning of the cooling process, rather than sequentially. The manifold's internal geometry pre-configures the flow paths to divide coolant into appropriate streams before they reach each heat exchanger, eliminating the need for extended series flow paths and reducing overall system pressure drops and flow restrictions.
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 ensures that each heat exchanger operates at optimal efficiency, allowing for potentially smaller heat exchanger components while maintaining overall cooling effectiveness, reducing system restrictions and improving cooling performance.
Implementation Method 1
A coolant guide or baffle is designed to direct coolant flow such that a substantial portion of the coolant entering the system flows around the first heat exchanger and then up into the second heat exchanger
Implementation Method 2
an oil cooler designed to cool the oil by transferring heat from the oil to the coolant fluid
Data Source
AI summary
A baffle for engine fluid cooling includes a fluid guide having a pair of side walls, a bottom wall, and a coolant fluid inlet. A channel receives a pair of heat exchangers such that one may be positioned proximate to or above a part of the bottom wall and the other may be positioned proximate to or above another part of the bottom wall. Some coolant entering the guide flows into the first heat exchanger and some coolant is passed under the first heat exchanger and subsequently into the second heat exchanger.