The problem of minimizing the maximum temperature of a structure insulated by a functionally graded metal foam insulation under transient heat conduction is studied. First, the performance of insulation designed for steady-state conditions is compared with uniform solidity insulation. It is found that the optimum steady-state insulation performs poorly under transient conditions. Then, the maxi...

This paper shows the attempt to increase performance of triple-junction hydrogenated silicon solar cells with structure nc-Si:H/a-Si:H/a-SiGe:H. The wxAMPS software was used simulate and optimize design. In an performance, a-SiC:H layer on p-layer replaced a-Si:H a-SiGe a step graded Si1-xGex layer. Then, achieve best performing device, we optimized concentration germanium thickness result that...

This article presents the theoretical analysis of composite electrical insulation, formed from layered dielectric materials and subjected to impulsive energization. The 1-D planar cylindrical geometries were considered, consisting an arbitrary number layers with relative permittivity conductivity. Analytical solutions have been successfully derived for time-dependent electric field inside <inli...