Space Charge Effects in Dielectric Liquids

Department of Electrical Engineering and Computer Science Laboratory for Electromagnetic and Electronic Systems High Voltage Research Laboratory, Cambridge, MA 02139 

For greater efficiencies in ac and dc power generation and transmission, and for larger energies in such pulsed power applications as 

Flow Electrification - The importance of charge effects is demonstrated by the flow electrification of such insulating liquids through insulating or conducting pipes or filters. Here, the mobile part of the electrical double layer that forms at the interface between dissimilar materials is swept away by the flow and can accumulate on insulating 

Most electrification measurements use pipe flow like that shown in Fig. la where the current entering the pipe plus the current generated within the pipe are measured by electrometer and equals the current measured at the outlet by electrometer E2. For insulating tubes, the radial and axial electric field components are measured by non-contacting field probes in the wall of a grounded surrounding metallic enclosure as 

TEMPERATURE Debye length. Laminar sub-layer, Arrhenius Viscosity (Reynold s ) Oil and paper conductivity. Paper/moisture equilibrium 

---