Predictive model estimating the performances of centrifugal pumps used as turbines

Barbarelli, Silvio; Amelio, Mario; Florio, Gaetano

doi:10.1016/j.energy.2016.03.122

Cited by 97 publications

(62 citation statements)

References 10 publications

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“…At this point of the procedure, the pump candidate for the hydrological site is selected. With the aim to calculate the performances curve of the pump working in reverse mode it is possible to apply the UNICAL numerical model, which is widely described in [16] and synthetically reported the next section.…”

Section: Selection Of the Pumps As Turbinesmentioning

confidence: 99%

“…Because the geometry of the PAT is unknown, unless it is disassembled, the code calculates the geometrical parameters of a reference pump prototype [16], starting from information deduced on the manufacturer's catalogue. Once these data are got, the code calculates the losses and determines the characteristics curves of the PAT, i.e., head vs. capacity and efficiency vs. capacity.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Using a Statistical-Numerical Procedure for the Selection of Pumps running as Turbines to be applied in Water Pipelines: Study Cases

Barbarelli¹,

Amelio²,

Florio³

2018

J. sustain. dev. energy water environ. syst.

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Cite as: Barbarelli, S., Amelio, M., Florio, G., Using a Statistical-Numerical Procedure for the Selection of Pumps running as Turbines to be applied in Water Pipelines: Study Cases, J. sustain. dev. energy water environ. syst., 6(2), pp 323-340, 2018, DOI: https://doi.org/10.13044/j.sdewes.d5.0181 ABSTRACTA combined method using statistical and numerical models has been developed by the authors for selecting a pump running as turbine to be applied in micro-hydro plants.The data of the hydrological site chosen for the installation (head and capacity) allow the calculation of two conversion factors which identify the pump to use successfully as turbine in that place. Then, a one-dimensional model, starting from data available on the pumps manufacturers catalogues, reconstructs a virtual geometry of the pump running as turbine, and calculates the performances curves, head vs. capacity, efficiency vs. capacity, useful for identifying the operating point. Two study cases are presented to apply the proposed methodology, concerning the feasibility of the installation of a pump running as turbine in the purifier water plants of Casali and Sersale, located at 1,000 m above sea level (Calabria, South Italy).The assessment of the annual energy yield gives a confirmation of the effectiveness and convenience of using pumps running as turbines.

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Section: Selection Of the Pumps As Turbinesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Using a Statistical-Numerical Procedure for the Selection of Pumps running as Turbines to be applied in Water Pipelines: Study Cases

Barbarelli¹,

Amelio²,

Florio³

2018

J. sustain. dev. energy water environ. syst.

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“…(2) Vacuum tank The vacuum tank is the main equipment used to control the pump suction pressure, whose volume is 4.3m 3 , and whose designed pressure is 1.1Mpa; it is equipped with a vacuum gauge with a measuring range of 0Mpa -0.09Mpa, and with a measurement accuracy of 0.001Mpa.…”

Section: Main Equipmentmentioning

confidence: 99%

“…Good hydraulic characteristics are of great significance to ensure reliable fluid transfer [2]. In a plateau, the atmospheric pressure decreases along with the increase of altitude, which leads to a decrease in the pump suction capacity, because of which the normal working status of the centrifugal pump will be affected [3]. Therefore, it is necessary to make the changing laws of the centrifugal pump's working status in a plateau clear, and to discover the changing law of hydraulic characteristics and the factors that influence it.…”

Section: Introductionmentioning

confidence: 99%

Experimental research on hydraulic characteristic of centrifugal pump in plateau

Jiang¹,

Zhang²

2017

IJHT

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The hydraulic characteristics of a centrifugal pump change when in a plateau, while the corresponding law is unclear. Therefore, experimental research needs to be undertaken on the hydraulic characteristics of a centrifugal pump in a plateau for a quantitative analysis of the changing law. In this paper, the working status of a centrifugal pump in a plateau was simulated by the method of controlling the inlet vacuum so as to acquire the pressure and the flow data under different working conditions. The corresponding conclusions were reached by using thorough data analysis, which shows that with every 500m increase in altitude, the accompanying pump pressure decreased by about 5%-10%, the flow decreased by about 2%-5% and the overall efficiency decreased by about 2%-9%. This theoretical analysis shows that the increase in pump frictional loss is the fundamental reason for the change in the hydraulic characteristics of a centrifugal pump in a plateau.

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“…The pressure is regulated with a valve installed at the network inlet, while the flow rate at the outlet is varied with a butterfly valve. Valves are remotely controlled with electronic actuators controlled by a dedicated homemade software program, with an external PLC [34][35][36][37][38][39][40]. The electric motor of the pump is linked to an inverter and the produced electrical power is connected to the urban power grid.…”

Section: Ns 376 Pump Model Validation With Experimental Datamentioning

confidence: 99%

A Performance Prediction Method for Pumps as Turbines (PAT) Using a Computational Fluid Dynamics (CFD) Modeling Approach

2017

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Small and micro hydropower systems represent an attractive solution for generating electricity at low cost and with low environmental impact. The pump-as-turbine (PAT) approach has promise in this application due to its low purchase and maintenance costs. In this paper, a new method to predict the inverse characteristic of industrial centrifugal pumps is presented. This method is based on results of simulations performed with commercial three-dimensional Computational Fluid Dynamics (CFD) software. Model results have been first validated in pumping mode using data supplied by pump manufacturers. Then, the results have been compared to experimental data for a pump running in reverse. Experimentation has been performed on a dedicated test bench installed in the Department of Civil Construction and Environmental Engineering of the University of Naples Federico II. Three different pumps, with different specific speeds, have been analyzed. Using the model results, the inverse characteristic and the best efficiency point have been evaluated. Finally, results have been compared to prediction methods available in the literature.

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Predictive model estimating the performances of centrifugal pumps used as turbines

Cited by 97 publications

References 10 publications

Using a Statistical-Numerical Procedure for the Selection of Pumps running as Turbines to be applied in Water Pipelines: Study Cases

Using a Statistical-Numerical Procedure for the Selection of Pumps running as Turbines to be applied in Water Pipelines: Study Cases

Experimental research on hydraulic characteristic of centrifugal pump in plateau

A Performance Prediction Method for Pumps as Turbines (PAT) Using a Computational Fluid Dynamics (CFD) Modeling Approach

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