Nitrogen supply system based on hydrazine dissociationFuture long-duration manned space missions will require a method of generating N2 for cabin leakage makeup and repressurization. Life Systems, working with NASA, is developing a Nitrogen Supply Subsystem (NSS) based on the dissociation of N2H4 into a mixture of H2 and N2. The latter is separated to provide the makeup N2. Recent advances in specific hardware developments have resulted in the design and fabrication of a nominal 3.6 kg/day N2 generation module. The design integrates a N2H4 catalytic dissociator, three ammonia (NH3) dissociation stages and four H2 separation stages into a 33 kg, 14 cu dm module. A technique has been devised to alternate the NH3 dissociation and H2 separation stages to give high N2 purity in the product stream. Tests have shown the product stream to contain less than 0.5 percent H2 and 20 ppm NH3. This paper discusses the development and test activities of the NSS program. It reviews the design, configuration, operation and projected performance characteristics of a 4.4 kg/day NSS suitable for NASA's planned Space Operations Center.
Document ID
19820027379
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Heppner, D. B. (Life Systems, Inc. Cleveland, OH, United States)
Quattrone, P. D. (NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 10, 2013
Publication Date
July 1, 1981
Subject Category
Man/System Technology And Life Support
Report/Patent Number
ASME PAPER 81-ENAS-27
Meeting Information
Meeting: American Society of Mechanical Engineers, Intersociety Conference on Environmental Systems
Location: San Francisco, CA
Start Date: July 13, 1981
End Date: July 15, 1981
Sponsors: American Society of Mechanical Engineers