Study of the flow mixing in a novel ARID raceway for algae production

Xu, Ben; Li, Peiwen; Waller, P.

doi:10.1016/j.renene.2013.06.049

Study of the flow mixing in a novel ARID raceway for algae production

Journal Article · Thu Jul 31 00:00:00 EDT 2014 · Renewable Energy

DOI:https://doi.org/10.1016/j.renene.2013.06.049· OSTI ID:1093709

Xu, Ben ^[1]; Li, Peiwen ^[2]; Waller, P. ^[2]

Univ. of Arizona, Tucson, AZ (United States); University of Arizona
Univ. of Arizona, Tucson, AZ (United States)

A novel flow field for algae raceways has been proposed, which is fundamentally different from traditional paddlewheel-driven raceways. To reduce freezing and heat loss in the raceway during cold time, the water is drained to a deep storage canal. The ground bed of the new raceway has a low slope so that water, lifted by propeller pump, can flow down in laterally-laid serpentine channels, relying on gravitational force. The flow rate of water is controlled so that it can overflow the lateral channel walls and mix with the main flow in the next lower channel, which thus creates a better mixing. In order to optimize the design parameters of the new flow field, methods including flow visualization, local point velocity measurement, and CFD analysis were employed to investigate the flow mixing features. Different combinations of channel geometries and water velocities were evaluated. An optimized flow field design and details of flow mixing are presented. The study offers an innovative design for large scale algae growth raceways which is of significance to the algae and biofuel industry.

View Accepted Manuscript (DOE)

Research Organization:: Univ. of Arizona, Tucson, AZ (United States)

Sponsoring Organization:: USDOE EE Office of Technology Development (EE-20); USDOE Office of Energy Efficiency and Renewable Energy (EERE)

Grant/Contract Number:: EE0003046

OSTI ID:: 1093709

Alternate ID(s):: OSTI ID: 1592769

Report Number(s):: DOE-DANF--0003046-Q7; 28302-Q

Journal Information:: Renewable Energy, Journal Name: Renewable Energy Vol. 62; ISSN 0960-1481

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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