Theoretical Analysis of Active Flow Ripple Control in Positive Displacement Pumps

Paolo Casoli, Carlo Maria Vescovini, Fabio Scolari and Massimo Rundo
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Paolo Casoli: Department of Engineering and Architecture, University of Parma, 43124 Parma, Italy
Carlo Maria Vescovini: Department of Engineering and Architecture, University of Parma, 43124 Parma, Italy
Fabio Scolari: Department of Engineering and Architecture, University of Parma, 43124 Parma, Italy
Massimo Rundo: Department of Energy, Politecnico di Torino, C.so Duca degli Abruzzi 24, 10129 Turin, Italy

Energies, 2022, vol. 15, issue 13, 1-22

Abstract: Positive displacement machines present a well-known major drawback that is the oscillation in delivered flow rate. This paper presents two active solutions for reducing the flow ripple generated by a pump with an external device actuated by means of a piezo-stack actuator. The work is focused on a theoretical analysis, with the aim of collecting information about the performance of the solutions proposed and their main advantages and drawbacks. The active methods proposed involve a cylindrical actuator connected to the delivery line of the pump. The piston could be actuated directly by a piezo-stack actuator or by a differential pressure modulated by a proportional piezo actuated valve. The actuators were modelled and a control algorithm based on Least Mean Square algorithm was used to achieve the adaptability for both systems at different operating conditions. The developed mathematical model permits to define the great potential of these solutions that can drastically reduce the flow ripple. The first architecture presented resulted as the best solution, while the second one allowed reduction of the production cost.

Keywords: positive displacement pump; active control; flow ripple; pressure ripple (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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