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Seven-Rod Pumping Concept for Highly Stable Solar Laser Emission

Author

Listed:
  • Hugo Costa

    (Centre of Physics and Technological Research, Physics Department, NOVA School of Science and Technology, 2829-516 Caparica, Portugal)

  • Dawei Liang

    (Centre of Physics and Technological Research, Physics Department, NOVA School of Science and Technology, 2829-516 Caparica, Portugal)

  • Joana Almeida

    (Centre of Physics and Technological Research, Physics Department, NOVA School of Science and Technology, 2829-516 Caparica, Portugal)

  • Miguel Catela

    (Centre of Physics and Technological Research, Physics Department, NOVA School of Science and Technology, 2829-516 Caparica, Portugal)

  • Dário Garcia

    (Centre of Physics and Technological Research, Physics Department, NOVA School of Science and Technology, 2829-516 Caparica, Portugal)

  • Bruno D. Tibúrcio

    (Centre of Physics and Technological Research, Physics Department, NOVA School of Science and Technology, 2829-516 Caparica, Portugal)

  • Cláudia R. Vistas

    (Centre of Physics and Technological Research, Physics Department, NOVA School of Science and Technology, 2829-516 Caparica, Portugal)

Abstract

A seven-rod solar laser head was conceptualized and numerically studied to improve the tracking error compensation capacity and power stability in end-side-pumping schemes. It was composed of a first-stage heliostat–parabolic mirror system, a second-stage fused silica aspheric lens and a third-stage conical pumping cavity, within which seven Nd:YAG rods were mounted. Highly stable solar laser emission, with a power loss inferior to 5% for tracking errors up to ±0.4°, could potentially be enabled with seven 4 mm diameter, 13 mm length rods. The tracking error width at 10% laser power loss was about 1.0°, which is 1.65 times higher than the experimental record, attained by a dual-rod side-pumping prototype. Furthermore, a total multimode laser power of about 41.2 W could also be achieved, corresponding to 23.3 W/m 2 collection and 2.5% solar-to-laser power conversion efficiencies, which are 1.65 and 1.36 times higher than those obtained with the dual-rod side-pumping prototype. They are also 1.27 and 1.12 times higher than the multirod experimental records in multimode regime for the same rod material.

Suggested Citation

  • Hugo Costa & Dawei Liang & Joana Almeida & Miguel Catela & Dário Garcia & Bruno D. Tibúrcio & Cláudia R. Vistas, 2022. "Seven-Rod Pumping Concept for Highly Stable Solar Laser Emission," Energies, MDPI, vol. 15(23), pages 1-16, December.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:23:p:9140-:d:991427
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    References listed on IDEAS

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    1. Hugo Costa & Joana Almeida & Dawei Liang & Miguel Catela & Dário Garcia & Bruno D. Tibúrcio & Cláudia R. Vistas, 2021. "Zigzag Multirod Laser Beam Merging Approach for Brighter TEM 00 -Mode Solar Laser Emission from a Megawatt Solar Furnace," Energies, MDPI, vol. 14(17), pages 1-16, September.
    2. Tibúrcio, B.D. & Liang, D. & Almeida, J. & Garcia, D. & Catela, M. & Costa, H. & Vistas, C.R., 2022. "Tracking error compensation capacity measurement of a dual-rod side-pumping solar laser," Renewable Energy, Elsevier, vol. 195(C), pages 1253-1261.
    3. Nsengiyumva, Walter & Chen, Shi Guo & Hu, Lihua & Chen, Xueyong, 2018. "Recent advancements and challenges in Solar Tracking Systems (STS): A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 81(P1), pages 250-279.
    4. Skouri, Safa & Ben Haj Ali, Abdessalem & Bouadila, Salwa & Ben Salah, Mohieddine & Ben Nasrallah, Sassi, 2016. "Design and construction of sun tracking systems for solar parabolic concentrator displacement," Renewable and Sustainable Energy Reviews, Elsevier, vol. 60(C), pages 1419-1429.
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