| Autor: |
Saeed, Rageh S., Djajadiwinata, Eldwin, Alswaiyd, Abdulelah, Alaqel, Shaker, Saleh, Nader S., Al-Ansary, Hany, El-Leathy, Abdelrahman, Jeter, Sheldon, Danish, Syed Noman, Al-Suhaibani, Zeyad, Sarfraz, Muhammad, Almutairi, Zeyad |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings; 2023, Vol. 2815 Issue 1, p1-8, 8p |
| Abstrakt: |
Direct particulate heating receivers (DPHR) are the most important part of the particle-based concentering solar power (PBCSP) systems in which the particles are exposed to direct high-concentrated sunlight. One variation of DPHRs is the obstructed flow receiver, which King Saud University (KSU) and the Georgia Institute of Technology have been developing for years. In this type of PHR, the particles fall freely in the form of a curtain through some obstruction to decelerate flow and allow the falling particles to absorb a considerable amount of thermal energy. The discrete structure presented in this design uses chevron-shaped mesh made of metallic alloy (Inconel 601) that was fixed on a Duraboard HD (an alumina-silica ceramic fiberboard). The design has been successfully tested using red sand and CARBOBEAD as heat transfer media. However, the interaction between the particulate and chevron mesh screen needs to be considered carefully at high operating temperatures. Careful consideration is the softening of the tip of the metallic chevron facing the sun. The tip of the mesh becomes soft at high temperatures and deforms which causes the particles to agglomerate on the chevrons, clog the chevron opening, and prevent particles from moving down to the end. Also, the particles get exposed to high flux for a long time which leads to particle fusing. Finally, a high degradation in the thermal efficiency of the system occurs as a result of this agglomeration and stops the whole operation of the plant. So, it is very important to study the interaction between the particulates and obstacles at high temperatures before installing it in the PHR cavity. This paper addresses these issues by presenting a study of the interaction between several chevron candidate materials and high-temperature candidate particles. The test was conducted in two stages: On-sun test and the lab test. Lab test is done by immersing the mesh screens with particulate materials and then heating at a specific temperature for several hours. For the chevron material, three candidates were considered: (a) stainless steel 316, (b) Inconel 601, and (c) ceramic mesh (WHIPOX). Three candidate particulate materials were considered: (a) Riyadh red sand, (b) Riyadh white sand, and (c) CARBOBEAD CP. Three temperature levels were considered in the lab test: (a) 800℃, (b) 1000℃, and (c) 1200℃. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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