LAPSE:2019.1208
Published Article
LAPSE:2019.1208
Optimization of Tubular Microalgal Photobioreactors with Spiral Ribs under Single-Sided and Double-Sided Illuminations
Yuling Lei, Jing Wang, Jing Wu
November 24, 2019
Microalgae can be raw materials for the production of clean energy and have great potential for development. The design of the microalgal photobioreactor (PBR) affects the mixing of the algal suspension and the utilization efficiency of the light energy, thereby affecting the high-efficiency cultivation of the microalgae. In this study, a spiral rib structure was introduced into a tubular microalgal PBR to improve the mixing performance and the light utilization efficiency. The number of spiral ribs, the inclination angle, and the velocity of the algal suspension were optimized for single-sided and double-sided parallel light illuminations with the same total incident light intensity. Next, the optimization results under the two illumination modes were compared. The results showed that the double-sided illumination did not increase the average light/dark (L/D) cycle frequency of the microalgae particles, but it reduced the efficiency of the L/D cycle enhancement. This outcome was analyzed from the point of view of the relative position between the L/D boundary and the vortex in the flow field. Finally, a method to increase the average L/D cycle frequency was proposed and validated. In this method, the relative position between the L/D boundary and the vortex was adjusted so that the L/D boundary passed through the central region of the vortex. This method can also be applied to the design of other types of PBRs to increase the average L/D cycle frequency.
Keywords
light/dark boundary, light/dark cycle frequency, orthogonal test, tubular microalgal photobioreactor, vortex
Suggested Citation
Lei Y, Wang J, Wu J. Optimization of Tubular Microalgal Photobioreactors with Spiral Ribs under Single-Sided and Double-Sided Illuminations. (2019). LAPSE:2019.1208
Author Affiliations
Lei Y: China-EU Institute for China and Renewable Energy at Huazhong University of Science & Technology, Wuhan 430074, China
Wang J: School of Energy and Power Engineering, Huazhong University of Science & Technology, Wuhan 430074, China
Wu J: School of Energy and Power Engineering, Huazhong University of Science & Technology, Wuhan 430074, China
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Journal Name
Processes
Volume
7
Issue
9
Article Number
E619
Year
2019
Publication Date
2019-09-12
Published Version
ISSN
2227-9717
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Original Submission
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PII: pr7090619, Publication Type: Journal Article
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LAPSE:2019.1208
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doi:10.3390/pr7090619
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Nov 24, 2019
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Nov 24, 2019
 
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Original Submitter
Calvin Tsay
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