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NASA Technical Reports Server (NTRS) 19870014260: In-situ analysis ... |
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by NASA Technical Reports Server (NTRS) |
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A gas analyzer utilizing a nondispersive infrared (NDIR) |
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detection system was used to monitor the ammonia and |
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water vapor content of the products of a previously |
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unused hydrazine gas generator. This provided an in-situ |
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measurement of the generator's efficiency difficult to |
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obtain by other means. The analyzer was easily installed |
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in both the calibration and hydrazine systems, required |
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no maintenance other than periodic zero adjustments, and |
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performed well for extended periods in the operating |
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range tested. The catalyst bed operated smoothly and |
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repeatably during the 28 hr of testing. No major |
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transients were observed on startup or during steady |
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state operation. The amount of ammonia in the output |
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stream of the gas generator was found to be a strong |
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function of temperature at catalyst bed temperatures |
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below 450 C. At temperatures above this, the efficiency |
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remained nearly constant. On startup the gas generator |
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efficiency was found to decrease with time until a steady |
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state value was attained. Elevated catalyst bed |
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temperatures in the periods before steady state operation |
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was found to be responsible for this phenomenon. |
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Date Published: 2016-09-19 20:03:31 |
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Identifier: NASA_NTRS_Archive_19870014260 |
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Item Size: 20054178 |
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Language: english |
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Media Type: texts |
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