Measurement Of Hydrogen In Helium Flow

The National Aeronautics and Space Administration (NASA) is one of the largest consumers of gaseous helium in the world. Because helium is a nonrenewable resource, it is desirable to conserve the gas whenever possible. This research is a first step toward enabling helium conservation through real-time measurement of H2 concentration in the purge gas. A commercial H2 sensor will be characterized for use as the real-time sensor and H2 concentration as an indicator the effectiveness of the purging process, thus enabling the minimizing of helium waste. A test apparatus for water and liquid nitrogen flow research was retrofitted to provide for measurement of hydrogen in a helium flow stream. Results are currently being compiled but will be presented in the final paper, as well as the overall process and activities related to student learning. Gas Exhaust Cryo Valve Flow Meter Thermocouple 3 and 4 Thermocouple 1 and 2 Pressure Sensor 2 H2Scan Thermocouple 5 and 6 Thermocouple 7 and 8 Pressure Sensor 1