Fuel Cell Wastewater Balancer for Aircraft Center-of-Gravity Control
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Solution Overview
Problem
The consumption of hydrogen in fuel cells disrupts the center of gravity in hydrogen-powered aircraft, necessitating a solution to maintain balance and reduce the need for trim and associated drag.
Innovation Solution
A system that utilizes a conduit to deliver wastewater from a fuel cell to a ballast tank, controlled by a controller to counterbalance the moment created by hydrogen depletion, using a ballast tank positioned rearward or laterally to maintain the aircraft's center of gravity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If hydrogen is consumed by the fuel cell to generate power, then energy production is improved, but the center of gravity of the aircraft is disrupted
Solution Approach 1:
The patent converts the harmful effect of hydrogen consumption (center of gravity disruption) into a beneficial effect by using the produced wastewater as ballast. The wastewater, which would normally be waste, is utilized to counterbalance the weight loss from hydrogen consumption, thereby maintaining center of gravity stability during flight.
Solution Approach 2:
Instead of discarding the wastewater produced by the fuel cell, the system recovers and utilizes it as ballast material. The wastewater is transported to a ballast tank where it serves as counterweight, transforming a waste product into a functional component that maintains aircraft balance.
2Stability of the object's composition
If wastewater is delivered to the ballast tank to counterbalance hydrogen depletion, then center of gravity stability is improved, but device complexity increases
Solution Approach 1:
The wastewater produced by the fuel cell serves multiple functions: it is first the byproduct of energy generation, then it becomes ballast material for center of gravity control. This multi-functionality reduces the need for separate systems, as the same substance performs different roles in the aircraft system.
Solution Approach 2:
The wastewater acts as an intermediary substance that transfers the balancing function. Instead of directly controlling the center of gravity through complex mechanisms, the system uses wastewater as a medium to achieve weight distribution control, simplifying the overall system architecture.
3Stability of the object's composition
If a ballast tank is positioned rearward or laterally to maintain center of gravity, then stability is improved, but the aircraft structure becomes more complex
Solution Approach 1:
The system dynamically adjusts the ballast configuration by controlling the distribution of wastewater in the ballast tank based on real-time hydrogen consumption rates and aircraft flight conditions. This dynamic adaptation allows the same structural addition to serve multiple balancing scenarios without requiring multiple fixed ballast positions.
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
Effectively maintains the center of gravity during hydrogen consumption, reducing the need for trim and associated drag by dynamically balancing the aircraft using wastewater.
Implementation Method 1
a fuel cell configured to consume hydrogen from the hydrogen tank
Implementation Method 2
the wastewater delivered to the ballast tank counterbalances a moment created by a depletion of hydrogen due to consumption of the fuel cell
Data Source
AI summary
A system and method for having a fuel cell wastewater balancer. The wastewater balancer includes a hydrogen tank which stores hydrogen to be consumed by a fuel cell and a ballast tank which stores wastewater produced as a biproduct of the fuel cell reaction. A controller maintains the center of gravity of an aircraft by distributing wastewater to the ballast tank as hydrogen is consumed by the fuel cell.