Water Science and Engineering 2010, 3(3) 331-340 DOI:   10.3882/j.issn.1674-2370.2010.03.009  ISSN: 1674-2370 CN: 32-1785/TV

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multi-criterion optimization
energy efficiency
water supply systems
renewable sources
CO2 emissions
FILIPE -Vieira
DIDIA -Covas
Article by Helena M. RAMOS,M.R
Article by Filipe,.V
Article by Didia,.C

Energy efficiency in a water supply system: Energy consumption and CO2 emission

Helena M. RAMOS1,Filipe Vieira2,Didia I.C. Covas2

1. Department of Civil Engineering, IST, Technical University of Lisbon, Lisbon 1049-001, Portugal
2. CEHIDRO, IST-DECivil, Lisbon 1049-001, Portugal


This paper presents important fundaments associated to the water/energy consumption and enhances the importance of renewable energy sources. A model of multi-criterion optimization for energy efficiency based on water and environment management policy, the preservation of the water resources, the control of water pressure and energy consumption, through a hybrid energy solution is developed and applied to a water supply system. The methodology developed includes three solutions: (i) water turbine installation in pipes where there is a need to control the pressure by pressure reducing valves, (ii) the optimization of pumping operations according to the electricity tariff and the water demand and (iii) the addition of a renewable energy source, a wind turbine, to supply energy to the pump-station and to sell the remaining to the national grid. The use of an integrated solution (water/energy) shows to be a valuable input to benefit from available hydro energy in WSS to produce clean power and the use of wind source allows reducing the energy consumption in pump-stations, which is still mostly based on fossil fuels with high levels of CO2 emissions.

Keywords multi-criterion optimization   energy efficiency   water supply systems   renewable sources   CO2 emissions  
Received 2010-04-21 Revised 2010-07-28 Online: 2010-09-27 
DOI: 10.3882/j.issn.1674-2370.2010.03.009

national nature fund;SRF for ROCS, SEM

Corresponding Authors: Helena M. RAMOS
Email: hr@civil.ist.utl.pt
About author:


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