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Multi-terminal HVDC system has gradually become a focus of DC transmission development because of superior economic efficiency and flexibility. It can effectively solve the breaking problems of DC short circuit current happened in multi-terminal HVDC system by developing a high voltage DC circuit breaker (DCCB) suitable for development needs of DC transmission system in our country, and this does...
A reconfigurable electromagnetic band gap (REBG) structure board is analyzed and designed in this paper. It is composed of a mushroom type EBG board, varactor diodes array, chip inductors and a digitally programmable DC controlling circuit. By changing the bias voltage on the varactor diodes, the surface-wave suppressive band gap of the EBG board can be tuned from 1.86 GHz to 6.32 GHz. Furthermore,...
Wastewater discharged from the campus is characterized as low-strength and relative centralization of usage period. The feasibility of sequencing batch activated reactor (SBR) treating low strength domestic wastewater generated in a campus were investigated through orthogonal test. Considering the pollution decomposition efficiency and the energy consuming, the optimal parameters for SBR treating...
In this study, the numerical investigation was adopted to analyze the deposition characteristic of polycrystalline silicon in a rib reactor. Fluent 6.2 was utilized to simulate the simultaneous momentum transfer, energy transfer and mass transfer, and to couple the gas-phase reaction with surface reaction in SiHC13 -H2 system. Computed flow structure, thermal and species distributions indicated that...
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