Vertical Day Tank Layout for Cleaner Enclosed Generator Fueling
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Solution Overview
Problem
Emergency electrical generator units face challenges with fuel management and contamination due to the design of belly tanks, which complicates fuel turnover, increases microbial growth, and leads to sludge formation and corrosion.
Innovation Solution
A fuel system featuring a vertically-oriented day tank that matches the enclosure width and height, reducing the footprint and surface area for fuel-water interfaces, thereby minimizing microbial growth and improving fuel flow 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 while maintaining structural support capabilities, thereby minimizing microbial growth conditions while preserving structural integrity.
Solution Approach 2:
The patent inverts the conventional horizontal tank orientation to a vertical configuration. This inversion fundamentally changes the fuel flow dynamics and reduces the surface area where water can accumulate and support microbial growth, while the tank still provides necessary structural support.
2Strength
If a belly tank with large plan view surface area is used, then generator support is provided, but fuel-water interface area increases leading to increased microbial growth
Solution Approach 1:
The patent changes the tank orientation from horizontal to vertical, fundamentally reducing the plan view surface area. This dimensional reconfiguration maintains the tank's structural support function while dramatically reducing the fuel-water interface area where microbial growth occurs.
3Volume of stationary object
If fuel is stored in a belly tank low to the ground, then space is optimized, but pump systems are required to return fuel to bulk storage
Solution Approach 1:
The patent inverts the tank orientation to vertical, which changes the gravitational flow dynamics. This allows fuel to return to bulk storage more efficiently, potentially reducing or eliminating the need for complex pump systems while maintaining space optimization.
4Object-affected harmful factors
If sulfur levels in fuel are reduced to below 15 PPM, then harmful sulfur oxides are reduced, but microbial proliferation is encouraged
Solution Approach 1:
The patent converts the harmful effect of low sulfur fuel (increased microbial growth) into a benefit by implementing a vertical tank design that minimizes fuel-water interface area. This structural solution compensates for the loss of sulfur's natural antimicrobial properties, allowing low sulfur fuel to be used without encouraging microbial proliferation.
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 vertical day tank design reduces the potential area for microbial growth, improves fuel flow, and decreases the need for return transfer pumps, enhancing overall fuel system efficiency and reducing contamination risks.
Implementation Method 1
A fuel system featuring a vertically-oriented day tank that matches the enclosure width and height, reducing the footprint and surface area for fuel-water interfaces, thereby minimizing microbial growth
Implementation Method 2
Belly tanks also have a very large plan view surface area which creates a large area of interface between fuel and water which exacerbates microbial growth between the fuel/water interface and also creates a large area for rust and corrosion
Implementation Method 3
Water, being a higher specific gravity than fuel, tends to coalesce at the bottom of a fuel tank, underneath the fuel. The water-fuel boundary, when undisturbed, provides a prime ground for continued growth of a colony.
Data Source
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.