Integrated Heat Exchanger in Marine Fuel Vapor Separator
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Solution Overview
Problem
Existing fuel vapor separators for marine outboard engines face challenges in cooling fuel efficiently without complicating the cooling lines, which can lead to clogs and manufacturing difficulties due to debris from the water source.
Innovation Solution
A heat exchanger integrated within the fuel vapor separator, featuring parallel fuel and coolant channels, provides efficient cooling to the fuel before it enters the reservoir, minimizing additional components and potential clogging risks by being disposed within the separator body, facilitating cost-effective manufacturing through extrusion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If complicated cooling lines with large surface contact areas are used to cool fuel, then the cooling efficiency is improved, but the system becomes susceptible to clogs and manufacturing difficulties
Solution Approach 1:
The heat exchanger is integrated within the fuel vapor separator body, merging the cooling function into the existing separator structure. This eliminates the need for separate complicated cooling lines while maintaining effective fuel cooling through the heat exchanger's internal channels.
Solution Approach 2:
The heat exchanger employs straight and parallel fuel and coolant channels that are segmented into discrete sections. This segmentation simplifies the manufacturing process through extrusion while providing sufficient surface area for heat transfer, avoiding the need for complex spiral or curved cooling lines.
2Temperature
If complicated cooling lines are used to cool fuel, then the cooling efficiency is improved, but the manufacturing cost and difficulty increase
Solution Approach 1:
The heat exchanger employs straight and parallel fuel and coolant channels that are segmented into discrete sections. This segmentation simplifies the manufacturing process through extrusion while providing sufficient surface area for heat transfer, avoiding the need for complex spiral or curved cooling lines.
3Temperature
If additional cooling components are added to the fuel system, then the cooling capability is improved, but the number of components and potential failure points increases
Solution Approach 1:
The heat exchanger is integrated within the fuel vapor separator body, merging the cooling function into the existing separator structure. This eliminates the need for separate complicated cooling lines while maintaining effective fuel cooling through the heat exchanger's internal channels.
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
The integrated heat exchanger effectively cools the fuel, reducing temperature and volatility, thereby preventing foaming and clogging issues while simplifying the cooling system and manufacturing process.
Implementation Method 1
The heat exchanger cools fuel returning from hot rail as it enters the fuel vapor separator but before it enters the fuel reservoir within the vapor separator
Implementation Method 2
The heat exchanger includes two long, connected parallel channels, through both of which the fuel flows, to extend the time the fuel flows through heat exchanger. In one of the channels, the fuel passes through the heat exchanger in counter flow to a coolant channel
Data Source
AI summary
A marine outboard engine includes an internal combustion engine including at least one fuel injector; a fuel vapor separator including: a separator body, a fuel reservoir defined by the separator body, and a first fuel pump fluidly connected between the fuel reservoir and the fuel injector; a fuel tank; and a second fuel pump fluidly connected between the fuel tank and the fuel vapor separator. The fuel vapor separator includes a heat exchanger disposed in the separator body. The heat exchanger includes at least one fuel channel defined by the heat exchanger body, the at least one fuel channel including: an inlet adapted for receiving fuel from the engine, and an outlet fluidly communicating with the fuel reservoir; and at least one coolant channel defined by the heat exchanger body, the at least one fuel channel and the at least one coolant channel being in thermal communication.