Experimental validation of different modeling approaches for solid particle receivers.
- German Aerospace Center (DLR), Spain and Stuttgart, Germany
Solid particle receivers have the potential to provide high-temperature heat for advanced power cycles, thermochemical processes, and thermal storage via direct particle absorption of concentrated solar energy. This paper presents two different models to evaluate the performance of these systems. One model is a detailed computational fluid dynamics model using FLUENT that includes irradiation from the concentrated solar flux, two-band re-radiation and emission within the cavity, discrete-phase particle transport and heat transfer, gas-phase convection, wall conduction, and radiative and convective heat losses. The second model is an easy-to-use and fast simulation code using Matlab that includes solar and thermal radiation exchange between the particle curtain, cavity walls, and aperture, but neglects convection. Both models were compared to unheated particle flow tests and to on-sun heating tests. Comparisons between measured and simulated particle velocities, opacity, particle volume fractions, particle temperatures, and thermal efficiencies were found to be in good agreement. Sensitivity studies were also performed with the models to identify parameters and modifications to improve the performance of the solid particle receiver.
- Research Organization:
- Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 1035985
- Report Number(s):
- SAND2009-4140C; TRN: US201205%%535
- Resource Relation:
- Conference: Proposed for presentation at the SolarPACES 2009 Conference held September 15-18, 2009 in Berlin, Germany.
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
25 ENERGY STORAGE
ABSORPTION
COMPUTERIZED SIMULATION
CONVECTION
FLUID MECHANICS
HEAT LOSSES
HEAT STORAGE
HEAT TRANSFER
HEATING
IRRADIATION
MODIFICATIONS
OPACITY
SENSITIVITY
SOLAR ENERGY
SOLAR FLUX
SOLAR PARTICLES
SOLAR THERMAL POWER PLANTS
THERMAL RADIATION
THERMOCHEMICAL PROCESSES
VALIDATION