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AN INTERANODE FAULT PROTECTION DEVICE FOR MAGNETOHYDRODYNAMIC CHANNELS

Award Information

Agency:
Department of Energy
Branch:
N/A
Award ID:
10911
Program Year/Program:
1990 / SBIR
Agency Tracking Number:
10911
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
Busek Co. Inc.
11 Tech Circle Natick, MA -
View profile »
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 2
Fiscal Year: 1990
Title: AN INTERANODE FAULT PROTECTION DEVICE FOR MAGNETOHYDRODYNAMIC CHANNELS
Agency: DOE
Contract: N/A
Award Amount: $499,724.00
 

Abstract:

INTERANODE ARCING IS ONE OF THE MOST FREQUENT AND DANGEROUS FAULTS IN A MAGNETOHYDRODYNAMIC (MHD) CHANNEL. IT REDUCES CHANNEL RELIABILITY AND LIMITS GENERATOR LIFETIME. THE OBJECTIVE OF THIS WORK IS TO ELIMINATE INTERANODE ARCING. WHEN AN INTERANODE VOLTAGE EXCEEDS APPROXIMATELY 50 TO 60 V,ARCING IS LIKELY TO OCCUR. THIS ARC IS DRIVEN BY THE LORENTZ FORCE INTO THE INTERANODE SPACE, WHERE IT CUTS THE INSULATOR AND ERODES THE ELECTRODES. THIS "FAULT" CONDITIONHAS A TENDENCY TO PROPAGATE UPSTREAM, ULTIMATELY CAUSING CATASTROPHIC DAMAGE. THUS, A FAST, AUTONOMOUS, PASSIVE DEVICE IS NEEDED TO ACT AS AN INTERANODE "ELECTRICAL SAFETY VALVE". THIS DEVICE WOULD CLAMP THE INTERANODE VOLTAGE AT ASAFE LEVEL. VOLTAGE CLAMPING NORMALLY IS ACCOMPLISHED BY CERAMIC DEVICES KNOWN AS SURGE ARRESTORS. THOSE THAT ARE COMMERCIALLY AVAILABLE HAVE NEITHER THE DESIRED VOLTAGE-CURRENT (V-1) CHARACTERISTIC NOR THE CAPABILITY TO ABSORB LARGE ENERGY. THESE CERAMIC DEVICES WILL BE MODIFIEDSO THAT THEY CAN MAINTAIN APPROXIMATELY 60 V INTERANODE VOLTAGE WHILE CONTINUALLY PASSING UP TO 40 A OF CURRENT. ATA VOLTAGE BELOW 40 V THE DEVICE WILL LIMIT THE CURRENT TO LESS THAN 0.1 A SO THAT, UNDER NORMAL OPERATING CONDITIONS, THE POWER LOSS IS NEGLIGIBLE. DESIGN AND CONSTRUCTION OF THE DEVICES AND BENCH-TOP TESTING USING A DC POWER SUPPLY WILL BE PERFORMED IN PHASE I. USING THE DATA OBTAINED FROM THESE TESTS, A PROTOTYPICAL DESIGN OF MHD-CAPABLE DEVICES WILL BE DEVELOPED. IN PHASE II, THE PROTOTYPES WILL BE CONSTRUCTED AND DEMONSTRATED ON THE MARK 7 MHD CHANNEL AT AVCO RESEARCH LABORATORY/TEXTRON. FOLLOWING SUCCESSFUL DEMONSTRATION ON THE MARK 7 CHANNEL, EXPANDED QUANTITY COULDBE INSTALLED ON THE COMPONENT DEVELOPMENT AND INTEGRATION FACILITY (CDIF) LONG DURATION GENERATOR.

Principal Investigator:

Dr V Hruby
Principal Investigator
6174493929

Business Contact:

Small Business Information at Submission:

Busek J Co Inc.
19 Kearney Rd Needham, MA 02194

EIN/Tax ID:
DUNS: N/A
Number of Employees: N/A
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No