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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Hydro-environment : Optimal location of micro-turbines in a water supply network
Optimal location of micro-turbines in a water supply network
Author : SAMORA, I. (1), FRANCA, M. J.(2) , SCHLEISS, A. (3) & RAMOS, H.(4)
ABSTRACT
Micro-hydropower is currently expanding as a solution to improve the efficiency of water systems by using energy
excesses which are typically lost. In the particular case of water supply systems, often excessive pressure exists in
zones of the network connected to other areas situated at higher altitudes. Pressure reducing valves are commonly used
as a mean for dissipation of this excess energy. In this work, the installation of micro-turbines in a closed water supply
network is analyzed as a way to recover the existing surplus of energy by converting it into electricity. The flow in water
supply systems is highly variable, with a direct impact on the efficiency of the turbine and, as most water-supply
networks are meshed, the optimal location of the energy converters is not straightforward and needs assessment by
simulation processes. For this purpose, an optimization tool based on the application of an evolutionary algorithm was
developed to select the best location, model and runner size of a selected number of turbines to install in a network.
Using the characteristic and efficiency curves of a micro-turbine and a database of flow demand given every hour, a
simulated annealing process is applied to maximize the energy production while pressure restrictions imposed by
regulation must be respected. The methodology was applied to a case study in a sub-grid of the water supply system of
the city of Lausanne, Switzerland, and the considered micro-hydro converter was a five blade tubular propeller. This
study is focused on the simulation problem and the convergence to optimal solution is analyzed under different
restrictions and number of turbines to install.
File Size : 323,265 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Hydro-environment
Date Published : 20/08/2015
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