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The bio-hill chart of a Kaplan turbine.

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Title: The bio-hill chart of a Kaplan turbine.
Authors: Romero-Gomez, P.1 (AUTHOR), Lang, M.1 (AUTHOR), Weissenberger, S.1 (AUTHOR)
Source: Journal of Ecohydraulics. Oct2022, Vol. 7 Issue 2, p94-110. 17p.
Subjects: Hydraulic turbines, Turbines, Computational fluid dynamics, Fish mortality, Water efficiency, Fishways
Abstract: The construction, rehabilitation and re-licensing of hydropower stations must nowadays fulfill strict demands for fish protection, particularly those related to enhanced turbine passage survival rates of downstream migratory species. In an analogy to the efficiency curves of a water turbine represented on a hill chart, the bio-hill chart introduced herein depicts the relationships between the operating conditions (i.e., discharge and head) and the potential survival rate of migratory fish passing through the turbine. The bio-hill chart applies over the entire operating range of the machine, which is a step forward with respect to previous works that determined hydraulic-biological evaluations for only a few operating points. The elaboration of a bio-hill chart involves two steps: (i) the calculation of turbine flows for each operating point and (ii) the corresponding evaluation of fish friendliness. The flow conditions are determined via computational fluid dynamics simulations. The calculation of fish friendliness relies on modelling approaches to determine mortality risks associated with collision on rotating blades and rapid decompression. We thoroughly describe the process to elaborate the bio-hill chart for juvenile salmonid species, as well as its implementation in a Kaplan turbine. The bio-hill chart represents a first approximation for determining those operating conditions that may mitigate fish mortality risks (i.e., maximize fish friendliness) and for quantitatively establishing the inevitable trade-off that exists between the hydraulic and environmental demands of hydropower generation. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Ecohydraulics is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 159584521
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
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  Data: The bio-hill chart of a Kaplan turbine.
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Ecohydraulics%22">Journal of Ecohydraulics</searchLink>. Oct2022, Vol. 7 Issue 2, p94-110. 17p.
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  Data: <searchLink fieldCode="DE" term="%22Hydraulic+turbines%22">Hydraulic turbines</searchLink><br /><searchLink fieldCode="DE" term="%22Turbines%22">Turbines</searchLink><br /><searchLink fieldCode="DE" term="%22Computational+fluid+dynamics%22">Computational fluid dynamics</searchLink><br /><searchLink fieldCode="DE" term="%22Fish+mortality%22">Fish mortality</searchLink><br /><searchLink fieldCode="DE" term="%22Water+efficiency%22">Water efficiency</searchLink><br /><searchLink fieldCode="DE" term="%22Fishways%22">Fishways</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The construction, rehabilitation and re-licensing of hydropower stations must nowadays fulfill strict demands for fish protection, particularly those related to enhanced turbine passage survival rates of downstream migratory species. In an analogy to the efficiency curves of a water turbine represented on a hill chart, the bio-hill chart introduced herein depicts the relationships between the operating conditions (i.e., discharge and head) and the potential survival rate of migratory fish passing through the turbine. The bio-hill chart applies over the entire operating range of the machine, which is a step forward with respect to previous works that determined hydraulic-biological evaluations for only a few operating points. The elaboration of a bio-hill chart involves two steps: (i) the calculation of turbine flows for each operating point and (ii) the corresponding evaluation of fish friendliness. The flow conditions are determined via computational fluid dynamics simulations. The calculation of fish friendliness relies on modelling approaches to determine mortality risks associated with collision on rotating blades and rapid decompression. We thoroughly describe the process to elaborate the bio-hill chart for juvenile salmonid species, as well as its implementation in a Kaplan turbine. The bio-hill chart represents a first approximation for determining those operating conditions that may mitigate fish mortality risks (i.e., maximize fish friendliness) and for quantitatively establishing the inevitable trade-off that exists between the hydraulic and environmental demands of hydropower generation. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Ecohydraulics is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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    Identifiers:
      – Type: doi
        Value: 10.1080/24705357.2020.1830723
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      – Code: eng
        Text: English
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        PageCount: 17
        StartPage: 94
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      – SubjectFull: Hydraulic turbines
        Type: general
      – SubjectFull: Turbines
        Type: general
      – SubjectFull: Computational fluid dynamics
        Type: general
      – SubjectFull: Fish mortality
        Type: general
      – SubjectFull: Water efficiency
        Type: general
      – SubjectFull: Fishways
        Type: general
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      – TitleFull: The bio-hill chart of a Kaplan turbine.
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            NameFull: Romero-Gomez, P.
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            NameFull: Lang, M.
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            NameFull: Weissenberger, S.
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            – D: 01
              M: 10
              Text: Oct2022
              Type: published
              Y: 2022
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            – TitleFull: Journal of Ecohydraulics
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