Design and manufacturing a hydrogen double vacuum piping system

Once hydrogen gas is directed through the second isolator valve, it travels into the test cell via a pipe with a diameter 50 mm larger than the previous section. This configuration is designed with the understanding that if a gap exists between the two piping sections coupled with a negative pressure, any potential air leakage can be managed effectively. Specifically, should any leakage be detected, the increase in pressure from the external environment can trigger corrective actions that will immediately cease the hydrogen supply. Consequently, this will activate the nitrogen purging system to ensure the test cell is safely cleared of any hydrogen presence, thus maintaining a safe operational environment.

While a vacuum double piping system is typically unnecessary for hydrogen gas operations, implementing this strategy allows us to completely isolate and secure the hydrogen system from the test cell. This enhanced safety measure ensures that our operations are well-protected against unforeseen incidents.

Additionally, we have carefully considered the potential risks associated with injector failure within the air intake port. We have installed a pneumatic gate valve before the air intake to mitigate this risk. This valve has sensors that activate its closure in case of a detected backfire. Specifically, the valve is designed to respond to signals from either a hydrogen or optical sensor. If the hydrogen sensor detects elevated levels of hydrogen or the optical sensor identifies signs of backfire originating from the intake port, the pneumatic gate valve will automatically close, isolating the airline and preventing any further hazards. This integrated safety mechanism significantly enhances our system's reliability and responsiveness to critical situations.