Vertical Day Tank Fuel System Reduces Generator Fuel Contamination
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Solution Overview
Problem
Emergency generator fuel tanks face issues with microbial and fungal growth due to a large fuel-water interface, structural obstructions causing flow problems, and contamination from stagnant fuel, exacerbated by low turnover and reduced sulfur levels in modern fuels, which complicates fuel management and can lead to sludge formation and filter clogging.
Innovation Solution
A vertically-oriented day tank system with reduced footprint and gravity-fed fuel lines, eliminating the need for return transfer pumps and reducing the fuel-water interface area, combined with modular design for easy installation and maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a rectangular belly tank is used to support the generator, then structural integrity is maintained, but fuel flow is obstructed and microbial growth is exacerbated
Solution Approach 1:
The patent transitions from a horizontal belly tank to a vertical day tank configuration. This dimensional change reduces the fuel-water interface area from a large horizontal surface to a smaller vertical surface, thereby reducing microbial growth while maintaining structural integrity through proper tank wall design.
Solution Approach 2:
Instead of placing the tank horizontally beneath the generator (conventional approach), the patent inverts the orientation by placing the tank vertically beside the generator. This inversion eliminates the need for complex pump systems and reduces fuel contamination while maintaining generator support functionality.
2Strength
If baffled walls are added to maintain structural integrity, then tank strength is improved, but fuel flow is obstructed
Solution Approach 1:
The patent removes the harmful baffled walls from the tank design. By extracting these obstructive elements, fuel flow is improved while structural integrity is maintained through alternative tank wall reinforcement methods that do not impede fluid circulation.
3Productivity
If a pump system is used to return fuel from belly tank to bulk storage tank, then fuel circulation is achieved, but system complexity increases
Solution Approach 1:
The patent positions the vertical day tank at the same elevation as the bulk storage tank, creating equipotential conditions that enable gravity-fed fuel circulation. This eliminates the need for pump systems while maintaining effective fuel circulation between tanks.
Solution Approach 2:
The fuel circulation system serves itself through gravity-driven flow from the vertical day tank back to the bulk storage tank. This self-service mechanism eliminates complex pump systems while maintaining continuous fuel circulation and turnover.
4Adaptability or versatility
If a large plan view surface area is provided in the belly tank, then generator mounting is enabled, but fuel-water interface area increases leading to more microbial growth
Solution Approach 1:
The patent provides generator mounting capability in the vertical dimension rather than requiring large horizontal surface area. The vertical day tank allows generator mounting on its top surface, achieving versatility while minimizing the fuel-water interface area to reduce microbial growth.
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 system effectively minimizes fuel contamination and sludge formation, enhances fuel flow, reduces the need for pumps, and supports efficient fuel management with a compact design suitable for emergency power generation.
Implementation Method 1
The overfill port is located above a fuel level of the bulk fuel storage tank to provide a gravity-fed return line
Data Source
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AI summary
A fuel system for a generating unit disposed within an enclosure, the enclosure having an enclosure width and an enclosure height, includes a bulk fuel storage tank and a vertical day tank, a supply line and a return line. The vertical day tank has a tank width corresponding to the enclosure width, a tank height corresponding to the enclosure height, and a tank depth selected to provide an interior volume to meet fuel capacity requirements for the generating unit. The tank height and tank width both exceed the tank depth. The vertical day tank further has a fill port and an overfill port located at a top of the vertical day tank. The supply line runs from the bulk fuel tank to the fill port of the vertical day tank, and the return line runs from the overfill port of the vertical day tank to the bulk fuel storage tank.