Pulsed high power generation systems using a disk MHD generator driven by nonequilibrium plasma generator

Conference · Wed Dec 31 04:00:00 EST 1997

OSTI ID:347697

Harada, N ^[1]

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1. Nagaoka Univ. of Technology (Japan)

The authors proposed a Closed Cycle Disk MHD generator driven by Nonequilibrium Plasma Generator (NPG/CCDisk) system as an alternative for the application of portable high performance pulsed power supply which could be applied for geophysical research, geological survey, earthquake prediction and other commercial and experimental power supplies. Performance prediction and design study of a disk generator for a NPG system were carried out. They found that in order to demonstrate higher performance, detailed design of channel shape was necessary. Design study was also carried out based on the concept that local electron temperature is kept so as to locate the plasma in the stable regime. Enthalpy extraction of up to 40% and output power of 7.2 MW with the thermal input of 18 MWt were successfully expected. The effects of combustion products of alumina particles and residual oxygen on generator performance were studied. Results showed that when alumina particles and oxygen concentration exceeded certain level, output power suddenly decreased. Fortunately, possible alumina particles and residual oxygen concentration at the typical NPG burning conditions were found to be well below each critical level of power degradation. The main principle of this NPG/CCDisk concept was confirmed. Finally, they can conclude that the proposed NPG/CCDisk system must provide reliable and durable high performance pulsed power supply.

• OSTI ID: 347697
• Report Number(s): CONF-970701--
• Country of Publication: United States
• Language: English

Related Subjects

30 DIRECT ENERGY CONVERSION
CLOSED-CYCLE MHD GENERATORS
DISK MHD GENERATORS
MHD CHANNELS
NON-EQUILIBRIUM PLASMA
PERFORMANCE
PLASMA PRODUCTION
PORTABLE EQUIPMENT
POWER SUPPLIES
USES