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Evaluation of power consumption of paddle wheel in an open raceway pond
Alternative TitleBioprocess. Biosyst. Eng.
Li, Yanxi1,2; Zhang, Qinghua1; Wang, Zhihui1; Wu, Xia1; Cong, Wei1
2014-07-01
Source PublicationBIOPROCESS AND BIOSYSTEMS ENGINEERING
ISSN1615-7591
Volume37Issue:7Pages:1325-1336
AbstractOpen raceway ponds are widely adopted in microalgae cultivation. Paddle wheels consume the most part of power during the process of cultivation in open raceway ponds. The configuration of blades directly determines power consumption for paddle wheels. In this work, power consumption of four blades configurations was determined in a bench-scale open raceway pond of 2.2 m(2). The effect of blades configuration, the influence of filling levels from 5 to 15 cm and influence of rotational speeds from 7 to 15 r min(-1) on shaft power consumption (P (S)), fluid velocity (U (c)) and paddle wheel efficiency (eta) was investigated. Results demonstrated that flat blades were the most efficient configuration. Higher culture depth led to larger U (c), more P (s) and larger eta, especially when blades were not totally immerged in water. Under the same filling level and rotational speed, the value of P (S) decreases in the order: zigzagged, flat, forward-curved and back-curved, respectively. The zigzagged blades led to a larger U (c) at the culture depth of 5 cm, while flat and forward-curved blades drove a larger U (c) when culture depth was higher than 5 cm. The maximum value of eta was 0.50 with flat blades at 11 r min(-1) and 15 cm of culture depth. Empirical correlations of non-dimensional numbers related to operation parameters and blades geometry for four paddle wheel blades were also proposed.; Open raceway ponds are widely adopted in microalgae cultivation. Paddle wheels consume the most part of power during the process of cultivation in open raceway ponds. The configuration of blades directly determines power consumption for paddle wheels. In this work, power consumption of four blades configurations was determined in a bench-scale open raceway pond of 2.2 m(2). The effect of blades configuration, the influence of filling levels from 5 to 15 cm and influence of rotational speeds from 7 to 15 r min(-1) on shaft power consumption (P (S)), fluid velocity (U (c)) and paddle wheel efficiency (eta) was investigated. Results demonstrated that flat blades were the most efficient configuration. Higher culture depth led to larger U (c), more P (s) and larger eta, especially when blades were not totally immerged in water. Under the same filling level and rotational speed, the value of P (S) decreases in the order: zigzagged, flat, forward-curved and back-curved, respectively. The zigzagged blades led to a larger U (c) at the culture depth of 5 cm, while flat and forward-curved blades drove a larger U (c) when culture depth was higher than 5 cm. The maximum value of eta was 0.50 with flat blades at 11 r min(-1) and 15 cm of culture depth. Empirical correlations of non-dimensional numbers related to operation parameters and blades geometry for four paddle wheel blades were also proposed.
KeywordMicroalgae Cultivation Open Raceway Pond Shaft Power Consumption Fluid Velocity Paddle Wheel Efficiency
SubtypeArticle
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine ; Technology
DOI10.1007/s00449-013-1103-3
URL查看原文
Indexed BySCI
Language英语
WOS KeywordPHOTOBIOREACTOR DESIGN ; MICROALGAE ; PERFORMANCE ; AERATORS
WOS Research AreaBiotechnology & Applied Microbiology ; Engineering
WOS SubjectBiotechnology & Applied Microbiology ; Engineering, Chemical
WOS IDWOS:000338237700010
Citation statistics
Cited Times:11[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/10931
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Natl Key Lab Biochem Engn, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Li, Yanxi,Zhang, Qinghua,Wang, Zhihui,et al. Evaluation of power consumption of paddle wheel in an open raceway pond[J]. BIOPROCESS AND BIOSYSTEMS ENGINEERING,2014,37(7):1325-1336.
APA Li, Yanxi,Zhang, Qinghua,Wang, Zhihui,Wu, Xia,&Cong, Wei.(2014).Evaluation of power consumption of paddle wheel in an open raceway pond.BIOPROCESS AND BIOSYSTEMS ENGINEERING,37(7),1325-1336.
MLA Li, Yanxi,et al."Evaluation of power consumption of paddle wheel in an open raceway pond".BIOPROCESS AND BIOSYSTEMS ENGINEERING 37.7(2014):1325-1336.
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