Green energy production has become more and more important in the last decade, thus many innovative devices have been developed to produce energy from renewable sources. The distributed generation is playing an increasingly important role in the sustainability.

At the end of 2012, professor Stefano Malavasi patented the GreenValve, a control valve able to recover the energy dissipated in flow rate control process. Then, a prototype of the device was created to be tested in Fantoli laboratory of the Politecnico di Milano. Meanwhile CFD analysis have been made to extend experimental results both to optimize GreenValve components and study its functioning under a wide range of boundary conditions. Some media about the project can be found Here. In 2017 has been succesfully partecipated a call for tenders published by regione Lombardia. The project nemed SmartWater is in collaboration with some small and medium-sized businesses located in the territory of regione Lombardia. 






  • Ferrarese, G.; Malavasi, S. (2020). Perspectives of water distribution networks with the GreenValveSystem. Water.
  • Ferrarese, G.; (2020). Flow management and energy harvesting with the Green Valve System, Doctoral dissertation.
  • Giacomo Ferrarese, Stefano Malavasi, (2016). Contribution to "Energy Harvesting: Technology, Methods and Applications", Nova Science Publishers.
  • Malavasi, S., Ferrarese, G., & Rossi, M. M. A. (2014). Experimental and Numerical Characterization of a New Control Valve. In Water Ideas. Bologna, Italy.
  • Malavasi, S., Ferrarese, G., & Rossi, M. M. A. (2016). A Control Valve for Energy Harvesting and Stand Alone Applications. In XXXV Convegno di Idraulica e Costruzioni Idrauliche. Bologna.
    Renee, W. (2015). Energy Harvesting: Technology, Methods and Applications. New York, USA: Nova Science Publisher.
  • Malavasi, S., Rossi, M. M. A., & Ferrarese, G. (2016). GreenValve: Hydrodynamics and Applications of the Control Valve for Energy Harvesting. Urban Water Journal.
  • Malavasi, S., Ferrarese, G., & Rossi, M. M. A. (2014). A Control Valve for Energy Harvesting. Procedia Engineering, 89, 588–594.


  • Italian Patent n° IT1410406 - 9/9/2014;
  • American Patent n° US2015/0041002 - il 21/03/2017;
  • Chinese Patent n°CN104145148B - 18/05/2016;
  • European Patent n° EP13713985.3 - 24/12/2014 n°EP2815159;
  • Canadian Patent n° CA2,864,054 - 13/12/2016.

 MS thesis

  • Paris, C. (2013). Analisi teorica e sperimentale di una valvola di regolazione per il recupero di energia. Politecnico di Milano.
  • Baccino, O. (2015). One Way Fluid Structure Interaction for GreenValve's Rotors Analysis. Politecnico di Milano.
  • Sacchi, M. (2017). Numerical Analysis of the Globe GreenValve. Politecnico di Milano.
  • Castellini, L. (2017). Energy Recovery from Water Distribution Systems. Politecnico di Milano.
  • Rizzuti, A. (2018). Gestione Automatica delle Pressioni con il Sistema Green Valve.
  • Benzi, S. (2019). Analisi Sperimentale di Prototipi Green Valve System
  • Dadda M., Gnocchi S. (2018) Caratterizzazione Sperimetnale e Confronto di Prototipi della Green Valve.

BS thesis

  • Parodi, M. (2017). Recupero di Energia da una Rete di Distribuzione. Politecnico di Milano.
  • Morelli, A. (2018). Caratterizzazione Sperimentale della GreenValve: Coefficeinte di Flusso e Indice di Cavitazione. Politecnico di Milano.
  • Monza, F., & Speranza, C. (2017). Ottimizzazione Energetica di Reti in Pressione e Caratterizzazione Sperimentale di un Dispositivo per il Recupero di Energia. Politecnico di Milano.
  • Baccino, O. (2015). One Way Fluid Structural Interaction for GreenValve's Rotor Blades Analysis.