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Open AccessArticle

Multi-Parametrical Tool for the Design of Bottom Racks DIMRACK—Application to Small Hydropower Plants in Ecuador

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Mining and Civil Engineering Department, Universidad Politécnica de Cartagena, Paseo Alfonso XIII, 52, 30203 Cartagena, Spain
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Civil and Environmental Engineering Department, Escuela Politécnica Nacional, Ladrón de Guevara E11-253, Quito 170517, Ecuador
*
Author to whom correspondence should be addressed.
Water 2019, 11(10), 2056; https://doi.org/10.3390/w11102056
Received: 4 August 2019 / Revised: 29 August 2019 / Accepted: 25 September 2019 / Published: 1 October 2019
(This article belongs to the Section Hydraulics)
A novel computational tool, DIMRACK, is presented for the design of the required length of bottom racks in intake systems. The users may consider clear water cases or the rack’s occlusion due to sediment transport in the river. The computational tool uses a methodology based on the experimental works undertaken at the Universidad Politécnica de Cartagena from 2010. This work also presents an extension of the methodology to cover a broad range of void ratios, bar profiles, slopes, and flow rates. Designing nomograms are also proposed. These are two diagrams to allow the approximate graphical computation of the rack length with clear water. In sediment transport cases, an occlusion factor is proposed, obtained from experimental gravel tests. This parameter enables an increment in the rack length due to occlusion, depending on the bar type. The results are compared with those proposed in classical technical manuals. Finally, the results have been compared with ten existing small hydropower plants’ bottom intake designs in Ecuador. View Full-Text
Keywords: bottom intakes; rack length calculation; multi-parametrical computational tool; DIMRACK bottom intakes; rack length calculation; multi-parametrical computational tool; DIMRACK
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García, J.T.; Castillo, L.G.; Haro, P.L.; Carrillo, J.M. Multi-Parametrical Tool for the Design of Bottom Racks DIMRACK—Application to Small Hydropower Plants in Ecuador. Water 2019, 11, 2056.

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