Research topic: Energy Recovery

REDAWN – Reducing Energy Dependency in Atlantic Area Water Networks

P.I.: prof. Helena Ramos (IST coordinator)

Collaboration of Prof. Paulo Branco and Prof. João Fernandes

Funded by Interreg Program, EU

Objectives:
  • Completion of an energy recovery resource assessment in water networks in the Atlantic Area;
  • Completion of an economic/environmental impact assessment of this technology on the region;
  • Development of design guidelines and support tools for hydropower energy recovery in drinking water, waste-water, irrigation and process industry sectors;
  • Development of policy and institutional support tools to increase the implementation of energy recovery projects;
  • Quantification of the societal impacts of hydropower energy recovery in water networks, and;
  • Widespread dissemination and promotion of energy efficiency in Atlantic Area water networks.
    • Works developed by this team:

    Electric behavior of the Pump working as Turbine (PAT) in off grid operation

    Optimal energy efficiency of isolated PAT systems by SEIG excitation tunning

    Transient study of series-connected PAT-SEIG off-grid systems

    add1

    This work proposed a solution that uses a bank of capacitors coupled to a self-excited induction generator to regulate the operation of the pump as turbine.

    add2

    To improve the efficiency in these recovery systems for rural areas, a methodology to obtain the best efficiency of the PAT-SEIG system is proposed,  when operating under different speeds and loads.

    main

    This work assesses the reliability of associating multiple groups of PAT systems in series, each connected to a self-excited induction generator (SEIG). 

    List of Publications related to this project

  • Margarida C. Pagaimo, João F.P. Fernandes, Modesto Pérez-Sánchez, P. Amparo López-Jiménez, Helena M. Ramos, P.J. Costa Branco, “Transient study of series-connected pumps working as turbines in off-grid systems”, Energy Conversion and Management, Volume 245, pp. 114586, 2021.
  • Pérez-Sánchez, M.; Fernandes, J.F.P.; Branco, P.J.C.; López-Jiménez, P.A.; Ramos, H.M. PATs Behavior in Pressurized Irrigation Hydrants towards Sustainability. Water 2021, 13, 1359. https://doi.org/10.3390/w13101359
  • Madeira, F.C.; Fernandes, J.F.P.; Pérez-Sánchez, M.; López-Jiménez, P.A.; Ramos, H.M.; Costa Branco, P.J. Electro-Hydraulic Transient Regimes in Isolated Pumps Working as Turbines with Self-Excited Induction Generators. Energies , 13, 4521, 2020.
  • Bernardo Capelo, Modesto Pérez-Sánchez, João F. P. Fernandes, Helena M. Ramos, P. Amparo López-Jiménez, P.J. Costa Branco, “Electrical behaviour of the pump working as turbine in off grid operation”, in Applied Energy, October 2017.