Novel particle release patterns have been proposed as a means to increase the thermal efficiency of high-temperature falling particle receivers. Innovative release patterns offer the ability to utilize light-trapping and volumetric heating effects as a means to increase particle temperatures over a conventional straight-line particle release pattern. The particle release patterns explored in this work include wave-like patterns and a series of parallel curtains normal to the incident irradiation that have shown favorable results in previous numerical studies at lower particle temperatures. A numerical model has recently been developed of an existing falling particle receiver at the National Solar Thermal Test Facility at Sandia National Laboratories to evaluate these patterns at elevated temperatures necessary to evaluate radiative and convective losses. This model has demonstrated that thermal efficiency gains of 2.5–4.6% could be realized using these patterns compared to the conventional planar release depending on the particle mass flow rate. Increasing the number of parallel curtains, increasing the spacing between curtains, and shifting the particle mass flow rate deeper in the receiver cavity was also found to increase the thermal efficiency. These effects became less significant as the particle mass flow rate increased.
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ASME 2017 11th International Conference on Energy Sustainability collocated with the ASME 2017 Power Conference Joint With ICOPE-17, the ASME 2017 15th International Conference on Fuel Cell Science, Engineering and Technology, and the ASME 2017 Nuclear Forum
June 26–30, 2017
Charlotte, North Carolina, USA
Conference Sponsors:
- Advanced Energy Systems Division
- Solar Energy Division
ISBN:
978-0-7918-5759-5
PROCEEDINGS PAPER
Numerical Evaluation of Novel Particle Release Patterns in High-Temperature Falling Particle Receivers
Brantley Mills,
Brantley Mills
Sandia National Laboratories, Albuquerque, NM
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Clifford K. Ho
Clifford K. Ho
Sandia National Laboratories, Albuquerque, NM
Search for other works by this author on:
Brantley Mills
Sandia National Laboratories, Albuquerque, NM
Clifford K. Ho
Sandia National Laboratories, Albuquerque, NM
Paper No:
ES2017-3689, V001T05A016; 8 pages
Published Online:
August 25, 2017
Citation
Mills, B, & Ho, CK. "Numerical Evaluation of Novel Particle Release Patterns in High-Temperature Falling Particle Receivers." Proceedings of the ASME 2017 11th International Conference on Energy Sustainability collocated with the ASME 2017 Power Conference Joint With ICOPE-17, the ASME 2017 15th International Conference on Fuel Cell Science, Engineering and Technology, and the ASME 2017 Nuclear Forum. ASME 2017 11th International Conference on Energy Sustainability. Charlotte, North Carolina, USA. June 26–30, 2017. V001T05A016. ASME. https://doi.org/10.1115/ES2017-3689
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