Also in this 2020, Walvoil took part in the Congress promoted by ATI, the Italian Thermotechnical Association, whose focus is SDG # 7 - CLEAN ENERGY FOR ALL, a contribution with programs, strategies, skills and innovation for the recovery of the economy in a green perspective, necessary more than ever in this particular historical moment.

Representatives of the industrial world, research and major Italian energy players participated in the two days of last 15 and 16 September, held online.
In this context Antonella Bonavolontà - University of Naples 'Federico II' Department of Industrial Engineering, made her speech on Walvoil paper, developed in collaboration also with Davide Mesturini – Walvoil R&D Director, Cesare Dolcin – Walvoil Test Department Manager, Pietro Marani - CNR-Imamoter, Emma Frosina and Adolfo Senatore, both from the Department of Industrial Engineering, University of Naples 'Federico II'.
Below the abstract of the paper.
For further information about the congress and the program: 
https://www.atinazionale.it/congresso-2020

75th ATI National Congress . WALVOIL PAPER . ABSTRACT
Antonella Bonavolontà, Davide Mesturini, Cesare Dolcin, Pietro Marani, Emma Frosina and Adolfo Senatore
Downstream Compensator: Innovative Systems, Modeling Analysis and Energy Optimization 

The Energy optimization is becoming fundamental in the Fluid Power world. University and industries are working hard to promote innovative and efficient ideas to optimize components that are the main cause of energy dissipation of ICE and recently Electric Off-Road vehicles. 
A new hydraulic layout based on the concept of “Downstream compensation” is introduced and then validated using real test data. Three architectures of this innovative Directional Control Valve are presented in this paper. The first idea of layout includes a compensator controlled by two pressure signals taken before and after the main spool of the hydraulic circuit. Thanks to its controlled stroke, this compensator diverts to a high-pressure accumulator part of flow that otherwise would be delivered to the tank. Moreover, two different layouts able to satisfy the Flow Sharing characteristic were developed. In any configuration, the compensator, thanks to its downstream position, allows to control the return flow, realizing a remarkable energy recovery from the overrunning loads and the simultaneous use of multiple actuators at different pressure levels. 
For all the analyzed hydraulic circuit, lumped parameter models were realized, using a commercial software. These models, validated with experimental tests, have allowed to calculate the energy recovery achieved by the system. Moreover, an optimization of the most important system’s parameters and components were realized to improve the system efficiency. 
In every tested configuration, this compensator ensures great advantages for both the energy recovery and the economic point of view. Finally, an outlook is drawn of the reuse of recovered flow through the application of an electro-hydraulic motor.
 

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