De-aeration of a diversion tunnel of a large scale hydroelectric scheme
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Date
2004-05-15
Publication Type
Conference Paper
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yes
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Abstract
Due to the influence of a varying water level in the main reservoir, the Jökulsá Tunnel as diversion tunnel from a secondary intake is subjected to a transition from free-surface to pressurized flow. As to avoid damage in the main conduit as well as of the hydraulic equipment, the air entrained into and transported downstream by the pressurized flow has to be removed before the junction of the two tunnel branches. A novel concept of de-aeration, basically consisting of vertical drill holes distributed along the Jökulsá Tunnel, was developed and technical feasibility ascertained by means of two physical hydraulic models. A concise description of the concept itself as well as of the modeling procedures is given.
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Publication status
published
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Book title
Hydraulics of Dams and River Structures
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Volume
Pages / Article No.
17 - 24
Publisher
CRC Press
Event
International Conference on Hydraulics of Dams and River Structures 2004
Edition / version
1st Edition
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Organisational unit
03820 - Boes, Robert / Boes, Robert
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Is part of: 10.1201/b16994