Volume 4 Issue 2
Authors: Di Gu; Baohui Wang; Yanji Zhu; Xueyin Piao; Qingwei Zang
Abstract: Using dye-sensitized solar cells coupled water-splitting electrode to produce hydrogen, compared with the traditional photoelectrolytic cell water-splitting energy consumption is much smaller. Because the entire photoelectric system is exposed to the air, so it solves the problem of the photoelectric cell’s water-splitting electrode corrosion seriously. It use three tandem dye-sensitized photovoltaic cells as a source of power, the open circuit voltage of photoelectric unit is 1.547V, shows the feasibility of using dye-sensitized photovoltaic cell decomposition of water to produce hydrogen. However, the maximum power point voltage of the photoelectric unit is 0.902V, and the photoelectric system still needs to be further optimized because of the system of water-splitting running at 1.3-1.4V photovoltaic.
Keywords: Dye-sensitized Solar Cell; Coupling; System of Water-splitting for Hydrogen Production
Authors: M. Shahid Ansari; Hafiz ur Rehman
Abstract: Densities and viscosities of ternary systems comprising of water + propan-2-ol and an electrolyte have been measured at different solvent compositions and electrolyte concentrations at temperatures between (288.15 and 313.15) K. The electrolytes employed were LiCl, NaCl, KCl, KI and SrCl2 most of which are either commonly found in natural water or have industrial applications. The concentrations of the electrolytes in various mixtures were increased to almost saturation and have been expressed in the temperature-independent molality (m) scale. Linear variation of densities with m can be expressed in terms of the gradient (the so-called g-factor) for different mixture compositions and the electrolytes. Viscosities of solutions have been explained using polynomials in m). With the exception of KI, for all the other electrolytes two immiscible phases are formed at the maximum working concentrations in the solvent mixtures having water mole fraction of 0.8.
Keywords: Viscosity; Density; Electrolyte Solution; Aqueous Propan-2-ol
Authors: E.V. Zenova; V.A. Chernyshev
Abstract: The report proposes a method to control the condition of the insulation gaps of power equipment. The method uses a representation of a “total polarization index” (tpi) reflecting the main polarization processes, developing in the insulation gap under the influence of an applied electric field. High sensitivity values tpi to change the structure of the insulating gap and ageing processes working material to provide control method the reliability and validity of results of the estimation.
Keywords: Condition of the Insulation Gaps; the Power Equipment; a Total Polarization Index; a Parameter Control; Quality Assurance