Concentrated solar power (CSP) plants using dense particle suspension as heat transfer fluid and particles the storage medium are considered a promising solution to provide high temperature required for supercritical carbon dioxide (S-CO2) Brayton cycle. During plant operation, variations in ambient would significantly affect system performance. Determining suitable S-CO2 cycle configuration this particle-based CSP requires accurate prediction comprehensive comparison on performance both at...

Due to the extensive applications in automotive and aerospace industries of Al–7Si–Mg casting alloys, an understanding their dendrite microstructural formation three dimensions is great importance order control desirable microstructure, so as modify performance castings. For this reason, a three-dimensional cellular automaton model (3-D CA) allowing for prediction growth ternary alloys presented. The kinetics solid/liquid (S/L) interface calculated based on solutal equilibrium approach. This...

Abstract In this paper, we present some efficient numerical schemes to solve a two-phase hydrodynamics coupled phase field model with moving contact line boundary conditions. The is nonlinear coupling system, which consists the Navier-Stokes equations general Navier Boundary conditions or degenerated conditions, and Allen-Cahn type dynamical condition static condition. proposed are linear unconditionally energy stable, where stabilities proved rigorously. Various tests performed show...

Implementing a high-efficiency hybrid energy generation system requires to comprehensively analyze the influences of multiple factors on overall performance, including layout, design parameters, resource endowments. For this purpose, study developed thermal-economic model for 300 kW ORC-based solar-geothermal power at four sites in China, which represents different solar and geothermal resources. The optimal configurations have been obtained minimal levelized cost (LCOE) under certain annual...

Abstract In this article, core‐shell structure nanofibers were fabricated by coaxial electrospinning with biodegradable copolymer Poly( L ‐Lactic‐ε‐Caprolactone) [P(LLA‐CL) 50 : 50] as shell and bovine serum albumin (BSA) core. Morphology microstructure of the characterized scanning electron microscopy transmission microscopy. The mechanical properties investigated stress‐strain tests. vitro degradation rates nanofibrous membranes determined measuring their weight loss when immersed in...

Abstract Electrospinning is a new method used in tissue engineering. It can spin fibers nanoscale by electrostatic force. A series of thermoplastic polyurethane (TPU)/collagen blend nanofibrous membranes was prepared with different weight ratios and concentrations via electrospinning. The two biopolymers 1,1,1,3,3,3,-hexafluoro-2-propanol (HFP) as solvent. electrospun TPU-contained collagen nanofibers were characterized using scanning electron microscopy (SEM), XPS spectroscopy, atomic force...

In this paper, we consider the numerical approximations for a hydrodynamical model of smectic-A liquid crystals. The model, derived from variational approach modified Oseen--Frank energy, is highly nonlinear system that couples incompressible Navier--Stokes equations and constitutive equation layer variable. We develop two linear, second order time marching schemes based on Invariant Energy Quadratization method terms in equation, projection equations, some subtle implicit-explicit...

We have investigated the green band (GB) emission from vertically aligned ZnO nanowires (NWs) prepared by vapor−liquid−solid growth technique. At low temperatures, GB consists of two sets zero phonon lines and their replicas independent laser excitation power. Temperature-dependent photoluminescence (PL) measurement is performed at temperatures 10 to 300 K, thermal evolution peak widths origin PL quenching high are discussed in detail. The multimode Brownian oscillator model adopted...

Abstract The good solubility of graphene‐based materials in various solvents without sacrificing their intrinsic properties is a prerequisite for further applications. In particular, it important application as practical optical limiter. A comprehensive study was conducted on the nonlinear property rationally designed amphiphilic graphene composite (PEG‐OPE‐rGO). By taking advantages unique energy diagram this composite, limiting (OL) performances PEG‐OPE‐rGO, which either dissolved with...

Central receiver concentrating solar power (CSP) plants based on particles as heat transfer fluid in circuits and supercritical CO2 (S–CO2) Brayton cycles can fulfil the requirements for next generation CSP to improve solar-to-electric efficiency reduce energy storage costs. However, effective incorporation of these two concepts requires an in-depth understanding their characteristics appropriate approach match them. This paper addresses importance design features annualized performances...