Heat and mass transfer analysis of a suspension of reacting particles subjected to concentrated solar radiation – Application to the steam-gasification of carbonaceous materials

Modelling of solar thermochemical reaction systems

“…Relevant STRS studies using this approach include (Haussener et al, 2009;Martinek et al, 2012a;Martinek and Weimer, 2013a;Saade et al, 2012;Z'Graggen and Steinfeld, 2009). When the particles Stokes number is not so small to warrant the entrainment approximation, the interactions between the fluid and particle need to be resolved.…”

“…It is perhaps the most popular method in the STRS modelling literature, likely due to the simplicity to program, scale, and include complicated spectral and directional properties. Studies employing the MC method include (Ebner and Lipiń ski, 2011;Jäger et al, 2009;Lapp et al, 2013;Lipiń ski et al, 2006;Martinek and Weimer, 2013a;Zedtwitz et al, 2007;Zedtwitz and Steinfeld, 2005;Z'Graggen and Steinfeld, 2009;. The finite volume method has been analysed for its applicability in STRS simulation in (Martinek and Weimer, 2013b).…”

“…Particles are generally considered or approximated as spherical which allows for the use of an exact solution to the electrodynamic scattering problem for a sphere, the Lorenz-Mie solution, to get the necessary RTE parameters. This approach is found widely in the literature for the dilute fluidised case (Haussener et al, 2009;Martinek et al, 2012a;Martinek and Weimer, 2013a;Z'Graggen and Steinfeld, 2009). Jäger et al uses a slightly modified Lorenz-Mie prediction to better fit experimental results (Jäger et al, 2009).…”

Review of Heat Transfer Research for Solar Thermochemical Applications

“…The directly irradiated vortex-flow solar reactor, Fig. 12(b), was modeled by means of a two-phase heat and mass transfer formulation for polydisperse suspensions of reacting particles, and solved by advanced Monte Carlo and finite volume techniques with smoothing and underrelaxation [92,93]. Validation was accomplished by comparing the numerically calculated temperatures, product compositions, and chemical conversions with the experimentally measured values obtained from testing a 5 kW solar reactor prototype in a high-flux solar furnace.…”

Unsteady 2D coupled heat and mass transfer in porous media with biological and chemical heat generations

“…Chemical reactors have been proposed to study energy generation by carbonaceous materials [4]. Numerous efforts have been made for describing non-equilibrium systems using different strategies.…”