Reactive ceramics are investigated for potential use in a rotary-type solar reactor. The two-step water-splitting process, which consists of O2-releasing (MOoxidized=MOreduced+1/2O2) and H2-generation (MOreduced+H2O(g)=MOoxidized+H2) reactions with yttria-stabilized zirconia (YSZ)-iron oxide...

Self-consistent analytical approach describes temporary steady-state nucleation of precipitates in a supersaturated solid solution under continuous generation of a solvent component. This kinetic stage appears due to dynamic balance between generation of monomers in the system and their...

The effect of thermal heat treatment on the mechanical and electrical properties of Cu–Ag alloys was investigated. The homogenization heat treatment leads to an increase in tensile strength and a decrease in electrical conductivity due to dissolution of Ag into copper matrix. Also, it is shown...

High-quality nano-sized Ce0.8Dy0.2O2−δ powders were synthesized by the solution combustion method, using C4H7NO4 (aspartic acid) as the combustion fuel. The nano-sized Ce0.8Dy0.2O2−δ powders provided an ultra-fine grain size and high density even at low sintering temperatures...

Well dispersed Ce1−xTbxO2−δ nano-powders were synthesized by using the carbonate coprecipitation method in an entire compositional range of 0⩽x⩽1, which allowed the preparation of highly dense pellets by sintering at 1673K and the systematical study of the electrical conductivity in...

This paper focuses on the climate change challenge faced by Central & Eastern European countries both those inside the European Union and those outside it. They have enormous energy intensity and associated greenhouse gas (GHG) emissions, mainly from energy production, which is oil, and worse,...

Present work is focused on building a TRNSYS simulation model of solar water heating (SWH) system using heat pipe evacuated tubes, hybridized with conventional fuel (i.e., natural gas) backup to provide uninterrupted thermal energy supply. An experimental facility was developed to validate the...

The presented paper focuses on different control strategies of a solar assisted ground source heat pump (SAGSHP) for cold climate. Dynamic simulation approach has been used through TRNSYS software. In particular, a SAGSHP solution operating with the strategies suitable for cold climate found in...