Research on gas-liquid-solid insulation system in stator slot
In evaporative cooling turbogenerator, all structures are immersing in evaporative cooling medium. Evaporative cooling turbogenerator which is transformed from inner water-cooling turbogenerator has been developed successfully. However, it has not taken full advantage of evaporative cooling medium's superiority in insulation. Besides, the amount of cooling medium is relatively large. This paper redesigns and analyzes gas-liquid-solid insulation system in stator slot from the perspective of the evaporative cooling technology. Furthermore, this paper provides the most appropriate materials and optimum thickness for solid insulation layer and fixed insulation layer in new insulation system. At last, this paper discusses wrapping width and interval of fixed insulation layer by three-dimensional model of new-designed insulation system.
The study of evaporative cooling technology in the rectification devices
As a powerfully efficient way of cooling, the evaporative cooling technology has been studied for 40 years in the way of basic research and engineering appliance. Now, the evaporative cooling technology is mostly applied to these fields: hydro-generator, turbo-generator, transformer and special electrical machine etc in china. The paper introduces a set of rectification device that adopts with evaporative cooling technology on the base of discussing the theory of the evaporative cooling. Thus it provides necessary reference for the integration of the power supply system.
Investigations of dielectric gratings using electrodynamic models based on volume integral equations
Eigenmodes of planar and cylindrical dielectric gratings (DGs) and electromagnetic wave scattering from multiplayer DGs are investigated. The DG characteristics are calculated using numerical-analytical solution of integral equations (IEs).