The solid particle receiver (SPR) is a direct absorption central receiver that can provide a solar interface with thermal storage for thermochemical hydrogen production processes requiring heat input at temperatures up to 1000 C. In operation, a curtain consisting of ∼690 μm ceramic particles is dropped within the receiver cavity and directly illuminated by concentrated solar energy. The heated particles exit the receiver and may either be stored or sent through a heat exchanger to provide process heat input. The performance of the receiver is dependent on the characteristics of the particle flow including velocity and opacity (optical density). In addition, because the SPR will have an open aperture there is also a possibility that the flow may be disturbed by high ambient winds. Computational models have been and are currently being used to simulate receiver performance at power levels up to several MWt. However, due to the complex two-phase nature of the solid particle flow, such models rely on experimental data both to provide physical input, such as boundary conditions, as well as to provide a point of comparison for model validation. In this paper, we present experimental results from tests performed using a small scale unheated solid particle curtain. These tests focus on the measurement of the flow characteristics of the solid particle curtain as it falls from a near-zero velocity discharge slot to a collection point three meters below. The results include measured values for the variation of velocity, solids volume fraction, curtain width, and curtain opacity along the length of the curtain.
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ASME 2007 Energy Sustainability Conference
July 27–30, 2007
Long Beach, California, USA
Conference Sponsors:
- Solar Energy Division and Advanced Energy Systems Division
ISBN:
0-7918-4797-7
PROCEEDINGS PAPER
Solid Particle Receiver Flow Characerization Studies
Nathan Siegel,
Nathan Siegel
Sandia National Laboratories, Albuquerque, NM
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Greg Kolb,
Greg Kolb
Sandia National Laboratories, Albuquerque, NM
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Kibum Kim,
Kibum Kim
University of Nevada at Las Vegas, Las Vegas, NV
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Vijayarangan Rangaswamy,
Vijayarangan Rangaswamy
University of Nevada at Las Vegas, Las Vegas, NV
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Samir Moujaes
Samir Moujaes
University of Nevada at Las Vegas, Las Vegas, NV
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Nathan Siegel
Sandia National Laboratories, Albuquerque, NM
Greg Kolb
Sandia National Laboratories, Albuquerque, NM
Kibum Kim
University of Nevada at Las Vegas, Las Vegas, NV
Vijayarangan Rangaswamy
University of Nevada at Las Vegas, Las Vegas, NV
Samir Moujaes
University of Nevada at Las Vegas, Las Vegas, NV
Paper No:
ES2007-36118, pp. 877-883; 7 pages
Published Online:
February 24, 2009
Citation
Siegel, N, Kolb, G, Kim, K, Rangaswamy, V, & Moujaes, S. "Solid Particle Receiver Flow Characerization Studies." Proceedings of the ASME 2007 Energy Sustainability Conference. ASME 2007 Energy Sustainability Conference. Long Beach, California, USA. July 27–30, 2007. pp. 877-883. ASME. https://doi.org/10.1115/ES2007-36118
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