Fuel Cell Warm-Up Mechanism with Remote Control
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Solution Overview
Problem
Fuel cell systems installed in moving objects face challenges in efficiently starting up due to the need for warm-up, especially when the polymer electrolyte membrane is dry or the reforming reaction is inactive at low temperatures, leading to reduced hydrogen production and energy efficiency issues.
Innovation Solution
A fuel cell system with a remote-controlled warm-up mechanism that uses a combination of combustion heat and electric heating to align the start-up completion time with a user-defined schedule, ensuring the fuel cell and reformer are warmed up efficiently, even at low temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the fuel cell system uses only electric heating for warm-up, then the control is simple and response is fast, but the energy consumption is high and the warm-up time is insufficient for large thermal masses
Solution Approach 1:
The patent combines multiple warm-up mechanisms (electric heater, combustion heater, exhaust heat recovery) into a unified system that can operate together or independently. The controller selects and coordinates these different heating sources based on system conditions, allowing the fuel cell system to achieve warm-up more efficiently by distributing the thermal load across multiple sources rather than relying on a single electric heater.
2Reliability
If the fuel cell system starts up immediately without remote pre-warmup, then the system response is faster to user commands, but the fuel cell cannot generate power at low temperatures and the reformer is inactive
Solution Approach 1:
The system performs preliminary warm-up actions remotely before the user actually needs the fuel cell operational. The controller can initiate warm-up sequences in advance based on predicted usage patterns or user preferences, ensuring that by the time the user needs power, the fuel cell and reformer are already at operational temperatures and ready to generate electricity immediately.
Solution Approach 2:
The controller continuously monitors temperature sensors throughout the fuel cell system and adjusts the warm-up mechanism output accordingly. This feedback loop allows the system to detect when warm-up is complete and automatically transition from warm-up mode to power generation mode, ensuring reliable operation while minimizing unnecessary warm-up time and energy consumption.
3Use of energy by moving object
If the system uses combustion heat for warm-up, then the warm-up efficiency is high and energy consumption is reduced, but the device complexity increases and control difficulty increases
Solution Approach 1:
The system uses its own exhaust heat, which would otherwise be wasted, to warm-up the fuel cell and reformer components. This self-service approach recovers thermal energy that is already present in the system, eliminating the need for external heating sources and reducing overall energy consumption without requiring additional complex heating equipment.
4Ease of operation
If the polymer electrolyte membrane is dry at low temperatures, then the system can operate without humidification, but the membrane conductivity decreases and power generation efficiency drops
Solution Approach 1:
The system changes the temperature parameter of the polymer electrolyte membrane through controlled warm-up, transitioning it from a low-temperature state with poor conductivity to an optimal operating temperature range. This parameter change naturally improves membrane conductivity and power generation capacity without requiring separate humidification control systems, as the thermal energy itself enables the membrane to function properly.
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 approach allows for reliable and efficient start-up of the fuel cell system at the desired time, maintaining energy efficiency and ensuring the system is operational when needed, even under varying temperature conditions.
Implementation Method 1
catalytic combustion of fuel is used for heating a reformer and coolant
Implementation Method 2
a heating mechanism to heat coolant during a cold stage of the fuel cell
Implementation Method 3
the flow rates of fuel and air to be supplied to the reformer during warm-up thereof are increased to promote warm-up of the CO remover unit
Data Source
AI summary
A fuel cell system (1, 100) adapted to be installed on a moving object (V) is provided with an electric power generating element (31, 45) including a fuel cell (31) supplied with fuel gas and oxidizing gas to generate electric power, a warm-up mechanism (21 to 23, 32 to 39, 41 to 50′) enabled to achieve warm up of the electric power generating element, and a controller (13), in response to reception of a control signal transmitted from an external remote operator unit (3) and commanding a start-up completion time at which start-up of the fuel cell system is to be completed through the warm-up of the electric power generating element, controlling the warm-up mechanism to allow the warm-up of at least the electric power generating element to be completed in alignment with the start-up completion time.