NDLI: Application of pulsed HV discharges to material fragmentation and recycling

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Application of pulsed HV discharges to material fragmentation and recycling

Content Provider	IEEE Xplore Digital Library
Author	Bluhm, H. Frey, W. Giese, H. Hoppe, P. Schultheiss, C. Strassner, R.
Copyright Year	1994
Abstract	The physical basis of electric impulse fragmentation and its applications to the recycling of composite materials are reviewed. The method is based on the initiation of a pulsed electric discharge inside the solid dielectric material. With pulse amplitudes of /spl sim/300 kV, material layers of /spl sim/2 cm can be punctured. Specific energy deposition, of /spl lsim/100 J/cm at a GW power level, leads to pressure buildup of /spl lsim/10/sup 10/ Pa in the discharge channel. Pressure waves and radially propagating cracks are launched into the solid body, which can lead to the separation of inclusions from the matrix or to detachment at material boundaries. To induce the discharge in the solid dielectric it must be immersed in a dielectric liquid with higher breakdown strength. Most applications use water, which has excellent breakdown strength at fast ramp rates and, due to its high permittivity, leads to field concentration in the solid dielectric. Electric impulse fragmentation is a clean physical method without any environmental burden and therefore well suited for recycling applications. In this paper we consider applications in the fields of demolition debris, incineration ashes, contaminated surface layers, electric appliances, glass, and elastoplastic materials. Finally, the economy and the scaling of the technique to large material throughput are discussed.
Sponsorship	National Natural Science Foundation of China (NSFC) Region Centre Ville de Tours Conseil General D'Indre et Loire ABB IEEE Sandia National Laboratories TOSHIBA
Starting Page	625
Ending Page	636
Page Count	12
File Size	1530648
File Format	PDF
ISSN	10709878
Volume Number	7
Issue Number	5
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2000-10-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Dielectric materials Solids Recycling Dielectric liquids Dielectric breakdown Composite materials Water conservation Permittivity Incineration Ash
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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