The presence of artificial correlations associated with Green–Kubo (GK) thermal conductivity calculations is investigated. The thermal conductivity of nano-suspensions is calculated by equilibrium molecular dynamics (EMD) simulations using GK relations….
deriving physically meaningful insights. Towards solving this problem, we present a new approach to making IAPs that are specifically optimized to accurately describe thermal vibrations/phonons. The approach enables nearly exact…
a ceramic pump that can operate at 1,400 ˚C, several hundred degrees hotter than existing heat transfer systems, opening up significant new possibilities for energy storage……….. Read more here: https://www.technologyreview.com/s/609093/ceramic-pump-that-takes-the-heat-promises-cheap-efficient-grid-storage/…
of temperature, spatial coordinate, and local mixture composition, by means of the unified Maxwell–Eucken–Bruggeman model, accounting for random particle distribution and inter-particle interaction. Results indicate that the combined thermal resistance…
dynamics; NMD: Normal-mode dynamics; PDL: Propagon, diffuson, locon; PGM: Phonon gas model; PR: Participation ratio; SCLD: Supercell lattice dynamics; SED: Spectral energy density; TDTR: Time-domain thermoreflectance; VCA: Virtual crystal approximation;…
more than 1,400 degrees Celsius (1,673 Kelvin) can transfer high temperature liquids such as molten tin, enabling a new generation of energy conversion and storage systems………. Read more here: https://www.rdworldonline.com/ceramic-pump-moves-molten-metal-at-a-record-1400-degrees-celsius/…
range of temperatures. Here, we note five key applications of research in thermal energy that could help make significant progress towards mitigating climate change at the necessary scale and urgency….
with drastic cost reductions compared to current batteries. One electricity storage concept that could enable these cost reductions stores electricity as sensible heat in an extremely hot liquid (>2000 °C)…
technical challenges, it is important to build a simplified, approximate, yet complete performance and cost model early on. Many cost factors rely critically on the chemical compatibility of a storage…
introduce two formalisms that determine the individual contributions of phonons to the diffusion of ions through a solid, based on nudged elastic-band calculations and molecular dynamics simulations. The results for…