Fuel Cell Exhaust Conduit Siphon for Water Backflow Protection
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Solution Overview
Problem
Existing fuel cell systems face the risk of water backflow into the system during fording operations, which can damage components like the turbine.
Innovation Solution
A conduit with a water discharge device and drainage valve is integrated into the fuel cell system, ensuring that any ingressed water is directed away from the turbine and discharged safely, thereby preventing backflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the outlet is arranged below the waterline to enable exhaust air discharge, then the exhaust air can be discharged effectively, but water can penetrate into the system during fording operations
Solution Approach 1:
A water discharge device is introduced as an intermediary component between the exhaust air system and the environment. This device selectively allows exhaust air to pass through while blocking water penetration during fording operations, thus resolving the contradiction between maintaining exhaust discharge capability and preventing water ingress.
Solution Approach 2:
The water discharge device is configured to prevent water from entering the system before water damage can occur. By positioning the device below the waterline and designing it with water-blocking functionality, the system proactively counteracts the harmful effect of water penetration while maintaining normal exhaust operations.
2Reliability
If a water discharge device is added to prevent water backflow, then water ingress is prevented, but the device complexity increases
Solution Approach 1:
The water discharge device performs multiple functions: it allows exhaust air to discharge during normal operation and blocks water during fording operations. By combining these functions into a single integrated component, the patent avoids adding separate complex systems while achieving both exhaust functionality and water protection.
Solution Approach 2:
The water discharge device merges the exhaust air discharge function with the water prevention function into a single integrated structure. This consolidation reduces overall system complexity compared to having separate systems for exhaust and water protection, while still providing comprehensive functionality.
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 proposed solution effectively minimizes the risk of water backflow into the fuel cell system, protecting critical components and ensuring system integrity during fording operations.
Implementation Method 1
a water discharge device for preventing an accidental water ingress from the outlet into the inlet is arranged between outlet and inlet of the fluid line, wherein the water discharge device is connected in fluid communication to at least one drainage valve
Data Source
AI summary
A conduit for discharging exhaust air from a fuel cell system, includes a fluid line including an inlet and an outlet configured to discharge the exhaust air into an environment, a turbine arranged at or in the inlet and configured to supply the exhaust air into the fluid line, a water discharge device arranged between the outlet and the inlet and configured to prevent an accidental ingress of water from the outlet into the inlet, and a drainage valve connected in fluid communication to the water discharge device. The water discharge device includes a siphon including a siphon wall having an upper edge positioned at a level higher than an installation level of the turbine.