Media-System Valve Heating for Fuel Cell Cold Starts
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Solution Overview
Problem
Fuel cell devices face challenges in starting reliably under freezing conditions due to ice formation in the media system, which increases effort, reduces efficiency, and increases costs by requiring additional heating elements.
Innovation Solution
An electromagnetically or electromotively actuated valve in the media system is used not only for controlling fluid flow but also for heating, by increasing electrical heating input power to raise the temperature above the melting point, eliminating the need for additional heating elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional heating elements are installed to prevent ice formation under freezing conditions, then the fuel cell device can start reliably, but the device complexity and manufacturing costs increase
Solution Approach 1:
The patent applies multi-functionality by enabling the valve to perform both its primary function (controlling fluid flow) and a secondary function (heating to prevent ice formation). The valve is equipped with a heating element that can be activated independently, allowing it to serve dual purposes without requiring separate dedicated heating components for the media system.
Solution Approach 2:
The patent combines the heating function with the existing valve structure in the media system. Instead of installing separate heating elements throughout the system, the heating capability is merged into the valve assembly, integrating multiple functions into a single component to reduce overall system complexity.
2Object-affected harmful factors
If additional heating elements are installed to prevent ice formation, then ice blockage is prevented, but manufacturing and operating costs increase
Solution Approach 1:
The valve is designed to perform multiple functions including flow control and heating. By making the valve multi-functional, the patent eliminates the need for separate dedicated heating components, thereby reducing manufacturing costs while still effectively preventing ice formation in the media system.
Solution Approach 2:
The valve with integrated heating capability can independently prevent ice formation without requiring external heating systems. The valve serves itself by providing the necessary heating function as part of its own structure, reducing the need for additional system components and associated costs.
3Temperature
If the valve is supplied with increased electrical heating input power, then the valve temperature rises above melting point to prevent ice, but energy consumption increases
Solution Approach 1:
The heating function is applied locally at the valve where it is most needed to prevent ice formation that would block fluid flow. By concentrating the heating action at this critical location rather than throughout the entire media system, the patent minimizes energy consumption while still achieving the temperature necessary to prevent ice blockage.
Solution Approach 2:
The valve with integrated heating element can independently regulate its own temperature to prevent ice formation. The self-service capability allows the valve to maintain appropriate temperature levels without requiring external heating systems, thereby optimizing energy usage by only heating when and where necessary.
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 solution allows fuel cell devices to start reliably under frosty conditions with minimal effort, reducing manufacturing and operating costs by integrating heating functionality into existing valve types without additional components.
Implementation Method 1
an electromagnetically or electromotively actuated valve... is used not only for controlling fluid flow but also for heating, by increasing electrical heating input power to raise the temperature above the melting point
Data Source
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AI summary
The aim of the invention is to create a fuel cell device, comprising a media system for supplying fluid media to electrochemical units of the fuel cell device and/or for removing fluid media from the electrochemical units of the fuel cell device, the media system comprising at least one valve to which, in a standard operational state of the fuel cell device, an electrical standard input power can be supplied in order to keep the valve in a required valve state, which fuel cell device can be reliably started with minimal expenditure even under frost conditions. This aim is achieved, according to the invention, in that the fuel cell device can be switched into a heating operational state, in which an electrical heating input power which is greater than the electrical standard input power can be delivered to the at least one valve.