Micro and mini-hydro installations in water distribution network (WDN) could be the confluence point between pressure control aimed to water losses reduction and valorization of renewable energy sources. The optimal design have to take into account daily and seasonal variation of water demand that can modify noticeably the machine working point. The possibility to use pumps working as turbine (PAT) requires to establish transfer relationship between the performance in the direct (pump) and reverse (turbine) operation. Experimental data of single and multi stage centrifugal and semi-axial flow pumps tested as turbine are presented. The knowledge of PAT operation allows to shown comparative results of methods to predict the PAT best efficiency point and indications on the complete characteristic curves. The results are compared with those presented by Derakhshan & Nourbakhsh (2008). Finally, considerations about the range of error in the evaluation of the energy that could be produced are indicated.

Experimental investigation of characteristic curves of centrifugal pumps working as turbines

NALDI, GIOVANNI;ARTINA, SANDRO;BRAGALLI, CRISTIANA;LISERRA, TONINO;MARCHI, ANGELA
2010

Abstract

Micro and mini-hydro installations in water distribution network (WDN) could be the confluence point between pressure control aimed to water losses reduction and valorization of renewable energy sources. The optimal design have to take into account daily and seasonal variation of water demand that can modify noticeably the machine working point. The possibility to use pumps working as turbine (PAT) requires to establish transfer relationship between the performance in the direct (pump) and reverse (turbine) operation. Experimental data of single and multi stage centrifugal and semi-axial flow pumps tested as turbine are presented. The knowledge of PAT operation allows to shown comparative results of methods to predict the PAT best efficiency point and indications on the complete characteristic curves. The results are compared with those presented by Derakhshan & Nourbakhsh (2008). Finally, considerations about the range of error in the evaluation of the energy that could be produced are indicated.
Integrating Water Systems
571
576
G. Naldi; S. Artina; C. Bragalli; T. Liserra; A. Marchi
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11585/88203
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