Electrolysis Spacecraft Propulsion Applications

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Form Approved REPORT DOCUMENTATION PAGE OMB No. 0704-0188 Publicreportingburdenforthiscollectionofinformationisestimatedtoaverage1 hourperresponse,includingthetimeforreviewinginstructions,searchingexistingdatasources, gatheringand maintainingthe data needed,and completingand reviewingthe collectiono'1information.Sendcommentsregarding thisburdenestimateor any otheraspect of this collectionofinformationi,ncludingsuggestionsforreducing thisburden,toWashingtonHeack:luarterSservices,DirectorateforInformationOperationsandReports,1215Jefferson Davis Highway,Suite 1204, Arlington,VA 22202-4302,and to the Officeof Managementand Budget, PaperworkReductionProject(0704-0188), Washington,DC 20503 1. AGENCY USE ONLY (Leave blank) 2. REPORT DATE October 1997 13. REPORT TYPE AND DATES COVERED Technical Memorandum 4. TITLE AND Electrolysis 6. AUTHOR(S) SUBTITLE Propulsion for Spacecraft Applications 5. FUNDING NUMBERS WU-632-1B-1B-00 8. PERFORMING ORGANIZATION REPORT NUMBER E- 10907 10. SPONSORING/MONITORING AGENCY REPORT NUMBER NASA TM-113157 AIAA-97-2948 Wim A. Andrew H. Weisberg, Preston H. Carter I1, Blake Myers, and Brian D. Reed 7. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES) National Lewis Cleveland, Aeronautics and Space Administration Research Center Ohio 44135-3191 de Groot, Lynn A. Arrington, James F. McElroy, Fred Mitlitsky, 9. SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESB(ES) National Aeronautics and Space Washington, DC 20546-0001 11. SUPPLEMENTARY NOTES Administration Prepared for the 33rd Joint Propulsion Conference and Exhibit cosponsored by AIAA, ASME, SAE, and ASEE, Seattle, Washington, July 6-9, 1997. Wim A. de Groot and Lynn A. Arrington, NYMA, Inc., 2001 Aerospace Parkway, Brook Park, Ohio 44142 (work funded by NASA Contract NAS3-27186); James E McElroy, Hamilton Standard, Windsor Locks, Connecticut; Fred Mitlitsky, Andrew H. Weisberg, Preston H. Carter II, and Blake Myers, Lawrence Livermore National Laboratory, Livermore, California; Brian D. Reed NASA Lewis Research Center. Responsible person, Wim A. de Groat, organization code 5400, (216) 977-7485. 12a. DISTRIBUTION/AVAILABILITY STATEMENT 12b. DISTRIBUTION CODE Unclassified Subject Category: 72 Distribution: Nonstandard This publication is available from the NASA Center for AeroSpace Information, (301) 6214)390. 13. ABSTRACT (Maximum 200 words) Electrolysis propulsion has been recognized over the last several decades as a viable option to meet many satellite and spacecraft propulsion requirements. This technology, however, was never used for in-space missions. In the same time frame, water based fuel cells have flown in a number of missions. These systems have many components similar to electrolysis propulsion systems. Recent advances in component technology include: lightweight tankage, water vapor feed electrolysis, fuel cell technology, and thrust chamber materials for propulsion. Taken together, these developments make propulsion and/or power using electrolysis/fuel cell technology very attractive as separate or integrated systems. A water electrolysis propulsion testbed was constructed and tested in a joint NASA/Hamilton Standard/Lawrence Livermore National Laboratories program to demonstrate these technology developments for propulsion. The results from these testbed experiments using a 1-N thruster are presented. A concept to integrate a propulsion system and a fuel cell system into a unitized spacecraft 14. SUBJECT TERMS Electrolysis; Propulsion; 17. SECURITY CLASSIFICATION OF REPORT Unclassified propulsion Satellite 18. and power system is outlined. NSN 7540_1-280-5500 SECURITY OF THIS PAGE 15. NUMBER OF PAGES 21 16. PRICE CODE A03 20. LIMITATION OF ABSTRACT Standard Form 298 (Rev. 2-89) Prescribed by ANSI Std. Z39-18 298-102 Unclassified Unclassified CLASSIFICATION 19. SECURITY OF ABSTRACT CLASSIRCATION

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