Improved Planning of Energy Recovery in Water Systems Using a New Analytic Approach to PAT Performance Curves
by
Modesto Pérez-Sánchez 1,*
, Francisco Javier Sánchez-Romero 2, Helena M. Ramos 3 and P. Amparo López-Jiménez 1
Modesto Pérez-Sánchez 1,*, Francisco Javier Sánchez-Romero 2, Helena M. Ramos 3 and P. Amparo López-Jiménez 1
1
Hydraulic and Environmental Engineering Department, Universitat Politècnica de València, 46022 Valencia, Spain
2
Rural and Agrifood Engineering Department, Universitat Politècnica de València, 46022 Valencia, Spain
3
Civil Engineering, Architecture and Georesources Departement, CERIS (Civil Engineering Research and Innovation for Sustainability), Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal
*
Author to whom correspondence should be addressed.
Water 2020, 12(2), 468; https://doi.org/10.3390/w12020468
Received: 10 January 2020 / Revised: 6 February 2020 / Accepted: 7 February 2020 / Published: 10 February 2020
(This article belongs to the Special Issue Hydraulic Dynamic Calculation and Simulation)
The use of pumps working as turbines (PATs) to improve the energy efficiency of water networks has been studied in the last years. This recovery system is justified due to a low investment contrasting with the capacity to take advantage in certain points with low and medium recoverable heads. Analyses of water systems using simulation software and/or optimization algorithms need the characteristic curves (head and efficiency) of the machines, which should be known with minor error by the water managers. The knowledge of the best efficiency point (BEP) as a turbine is one of the major limitations when the user wants to choose PATs. In this sense, the present research defines new approach equations to estimate the BEP of the PAT, as well as to predict the characteristic curves, comparing the results with the rest of the published methods. The comparison demonstrated that the new proposal reduced the error indexes, improved the R2 and increased the accuracy of the error ellipse using an experimental database of 181 different PATs.
Keywords:
BEP prediction; PATs; characteristic curve; energy efficiency
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited
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MDPI and ACS Style
Pérez-Sánchez, M.; Sánchez-Romero, F.J.; Ramos, H.M.; López-Jiménez, P.A. Improved Planning of Energy Recovery in Water Systems Using a New Analytic Approach to PAT Performance Curves. Water 2020, 12, 468.
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