Fuels and Energy Sources

Hydrogen fuel

Stories

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Briefs: Sensors/Data Acquisition
Integrated electrochemical sensors are being developed for use in measuring concentrations of sulfur dioxide in gas mixtures. These sensors are based on the electrochemical oxidation of SO2 and...
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Briefs: Physical Sciences
Computer-Controlled Instrumentation Measures Hydrogen Leaks
An instrumentation system monitors rates of leakage of hydrogen from multiple zones on a complexly shaped tank. Each zone is established by bagging a designated exterior portion of the tank. The bag for each zone is purged with a carrier gas (either nitrogen or helium) at a controlled flow...
Briefs: Physical Sciences
Analysis of Stresses and Deflections in RTDs
A report presents an analysis of stresses and deflections in resistance temperature detectors (RTDs) of various model numbers with standard sizes and shapes. The RTDs are assumed to be installed in pipes that contain flows of oxygen and hydrogen in a test facility at Stennis Space Center. The analysis,...
Briefs: Physical Sciences
An instrumentation system monitors ambient air to determine whether hydrazine vapor is present in sufficient concentration to be harmful to humans or equipment. The system can measure hydrazine...
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Briefs: Mechanical & Fluid Systems
The figure presents a simplified view of a shaft seal that provides a small flow of neutral buffer gas to prevent contact between different gases contained in two adjacent regions along the shaft. In the original application,...
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Briefs: Medical
A method of measuring the concentration of a selected organic compound (analyte) in a sample of water involves (1) producing hydrogen peroxide as a byproduct of enzyme-catalyzed...
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