@inproceedings{208078b17ae342f08824c90c0c694f23,
title = "Hydraulic Design Challenges of High Head 880 MW Gouv{\~a}es Pumped-Storage Power Plant",
abstract = "The 880 MW pumped-storage power plant of Gouv{\~a}es, which is part of the Alto T mega hydro power scheme from Iberdrola is currently under construction in the north of Portugal. The power plant is equipped with 4 reversible Francis pump-turbines with a gross head of 660 m. The power plant features several challenges with respect to the hydraulic design such as: i) ultra-high-head single stage reversible Francis pump-turbine of very low specific speed leading to severe hydraulic transients, ii) a long high-pressure penstock, iii) an headrace differential surge tank linked to a 4700 meters long headrace tunnel and iv) a complex tailrace differential surge tank linked to a 700 meters long tailrace tunnel. To perform the hydraulic design of the pumped-storage power plant, a stepwise approach presented in the paper was undertaken by Iberdrola. A detailed 1D hydraulic transient analysis was performed to optimize the headrace and tailrace surge tank dimensions. Then a combined CFD and reduced scale physical transient tests of both surge tanks was conducted. This enabled to address the complex 3D flow physics that develop in surge tanks but are not captured by 1D transient simulations such as free surface, upsurges against walls, verification of throttle singular head losses and effects not captured by 3D CFD such as air-water mixture and detection of air entrainment risk.",
keywords = "Surge Tank, Hydraulic System, Transient Hydraulics, Pumped Storage Hydropower, Energy Storage, Hydraulic Machinery",
author = "Christophe Nicolet and Christian Landry and Wolfgang Richter and {Vera Rodriguez}, {Juan Carlos} and {de la Torre Abietar}, Luis and Gerald Zenz",
year = "2021",
month = jun,
day = "15",
doi = "10.1088/1755-1315/774/1/012011",
language = "English",
volume = "774",
series = "IOP Conference Series: Earth and Environmental Science",
publisher = "Curran Associates, Inc",
booktitle = "Proceedings of 30th IAHR Symposium on Hydraulic Machinery and Systems",
edition = "1",
note = "30th IAHR Symposium on Hydraulic Machinery and Systems : IAHR 2020, IAHR 2020 ; Conference date: 21-03-2021 Through 26-03-2021",
}