Gas-Solid Flow in a Fluidized-Particle Tubular Solar Receiver: Off-Sun Experimental Flow Regimes Characterization

The fluidized particle-in-tube solar receiver concept is promoted as an attractive solution for heating particles at high temperature in the context of next generation power tower. Similar to most existing central receivers, irradiated part system, absorber, composed tubes which circulate particles. In this concept, bottom tip immersed a bed generated vessel named dispenser. A secondary air injection, called aeration, added tube stabilize flow. Contrary risers, particle mass flow rate controlled by combination overpressure dispenser and aeration velocity tube. This originality system that justifies specific study fluidization regimes wide range operating parameters. Moreover, due value aspect ratio, structure varies along Experiments were conducted with Geldart Group ambient 0.045 m internal diameter 3 long Various temporal pressure signal processing methods, applied case classical are applied. Over short acquisition time, cross-reference results necessary identify characterize regimes. Bubbling, slugging, turbulent fast encountered two operation modes, without circulation, compared.