Thermal performance of vortex-based solar particle receivers for sensible heating

Recent Advancements in High-Temperature Solar Particle Receivers for Industrial Decarbonization

“…Furthermore, the materials used for these receivers are more stable and Although these air receivers have previously been widely reported for use in pursuit of high temperatures [8,59,64,65], inferior heat transfer properties are a challenge for their upscaling. In this regard, the use of solid particles in suspension within an air stream has the potential to increase the effectiveness of the heat transfer mechanisms within the receiver cavity due to their high surface area per unit mass and capacity for the direct absorption of concentrated solar radiations [67]. However, this requires further investigation of the quantitative benefits achieved through the addition of particles into the air stream.…”

“…This type of cavity receiver is commonly known as a solar vortex receiver (SVR) [101]. The basic design of a SVR is shown in Figure 8 [67]. SVR comprises an aperture covered by a quartz window placed normally in relation to the cavity axis, through which concentrated solar radiations fall onto the particles, being injected tangentially along with a gas to form a vortex.…”

“…These CFD studies have significantly contributed to investigating the flow features inside a cavity receiver, but the influence of solar transients on the long-term thermal performances of these receivers, considering start-up, turn down, and shutdown periods, is still unknown. Some analytical models have also been developed for high-temperature particle-laden receivers [67,112,113], but these have not considered the transient effect on the annual thermal performance. A recent study by Davis et al [67] employed a steady-state analytical model developed for a cylindrical cavity high-temperature particle receiver to observe its thermal performance under varying operating conditions.…”

“…Some analytical models have also been developed for high-temperature particle-laden receivers [67,112,113], but these have not considered the transient effect on the annual thermal performance. A recent study by Davis et al [67] employed a steady-state analytical model developed for a cylindrical cavity high-temperature particle receiver to observe its thermal performance under varying operating conditions. The authors assumed a constant solar flux of 2000 kW/m 2 .…”

Fluidized Beds for Concentrated Solar Thermal Technologies—A Review

“…As matter of fact, the development of novel reactor concepts (Alonso and Romero, 2015;Kodama et al, 2017a;Zsembinszki et al, 2018;Arastoopour, 2019) that can be effectively coupled with CSP systems has been reported in the recent literature. Cyclonic, free-falling particles, fixed, fluidized and mobile beds, and rotary receivers/reactors in directly and indirectly irradiated configurations have been extensively taken into account for heating of particles and for chemical reactions appropriate to TCES and production of solar fuels (Marxer et al, 2015;Ho, 2016;Koepf et al, 2016;Davis et al, 2019a;Davis et al, 2019b;Davis et al, 2020). Falling particle receivers/reactors can be attractive as it does not entail a gas stream for particle motion, with related advantages in terms of operation expenses.…”