Characteristic Curve Prediction of a Commercial Centrifugal Pump Operating as a Turbine Through Numerical Simulations

Vásquez, Diego Penagos; Graciano-Uribe, Jonathan; Río, Jorge Sierra del

doi:10.37934/arfmts.83.1.153169

Cited by 10 publications

(7 citation statements)

References 38 publications

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“…Furthermore, the change in blades shape does not show important problem-solving results, therefore, modification is the need for a more resilient energy reservation. These results show the similarity of output power characteristics with a study conducted by Bachtiar et al, [14]. 7 shows that an increase in electrical load leads to a decrease in voltage.…”

Section: Resultssupporting

confidence: 87%

Experimental Study on the Effects of Turbine Blades Types on the Performance of Centrifugal Pump as Pico-Hydropower Generation

Asral

Abdurrahman

Deswita

2023

ARFMTS

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Turbines are rotary mechanical devices used to extract energy from rivers with waterfall and convert them into electricity for rural areas. However, many small turbines installed in rural areas are expensive and dependent on the types of blades to provide the required energy. Therefore, this study aims to determine the effects of backward, inclined, and forward blades of turbines on the centrifugal pump's performance as pico-hydro power. This study was carried out in Riau Province due to the low flow of water, with varying turbine blades for small-scale hydropower generation. Rust-resistant and lightweight materials were selected for the manufacture of the turbine and to keep it from damaging. The turbine was tested in a laboratory to determine the characteristics and maximum power output from rivers and waterfall. The result showed that the turbine produces a maximum electrical power of approximately 1000 Watts using the backward blades due to its ability to support and save water resources.

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Section: Resultssupporting

confidence: 87%

Experimental Study on the Effects of Turbine Blades Types on the Performance of Centrifugal Pump as Pico-Hydropower Generation

Asral

Abdurrahman

Deswita

2023

ARFMTS

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“…Table 1 shows the BEP data and geometrical parameters of the turbomachine, along with the manufacturer's information [26]. The turbomachine evaluated in this study was analyzed in a previous publication for obtaining the turbine-mode characteristic curve [27].…”

Section: Study Casementioning

confidence: 99%

“…The boundary conditions in turbine mode change concerning the inlet and outlet, where these two conditions are reversed. In a previous study by Vásquez et al, [27], the BEP was calculated as H = 56.79 m, 𝑄 = 49.99 m³/h, and 𝜔 = 1382 rpm. Based on the above, the inlet boundary (volute outlet) was used as mass flow, the outlet boundary (impeller inlet) as pressure, and the rotation at 1382 rpm.…”

Section: Turbine Modementioning

confidence: 99%

Influence of Leading and Trailing Edge Angle on Impeller Blades of a Pump as Turbine

Diego Penagos-Vasquez,

Jonathan Graciano-Uribe,

Luis Grisales-Noreña

et al. 2023

ARFMTS

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A pump as turbine (PAT) is a turbomachine that converts hydraulic energy into electricity. One of the study topics in PAT is the efficiency due to centrifugal pumps are not designed to operate in reverse mode. Geometric variations of the impeller have been studied in the literature. However, it was not possible to evidence the influence of the inclination of the blade leading and trailing edge. Therefore, the objective of this work is to analyze numerically and fluid dynamically the inclination angle of the blade leading and trailing edge of a centrifugal pump, in pump and turbine mode. First, the characteristic curve was validated. Then, the inclination of the leading and the trailing edge was modified, in a range of 25° to 90°, obtaining head, efficiency, and power graph. As a result, in pump mode was evidenced that an angle close to 90° on the blade trailing edge provides a higher efficiency of 50.26% and decreases until 40.77% when the angle approaches 30°, reducing the head to around 20%, while power remained constant. In turbine mode, an inverse effect was obtained, where the maximum efficiency was 60.9% and the generated power increased up to 4.76 kW in the blade leading edge. Therefore, the angular variation of the leading and the trailing edge is adequate in turbine mode, while in pump mode there is a loss of capacity.

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“…The characteristic curves present the performance of a centrifugal pump, and these curves are comprised of several terms, which usually are pumping head versus flowrate, input power against flowrate, and efficiency against flowrate [17]. If the performance curves of the pump are not given by the manufacturers, and to produce such operation curves, the test of the pump should be done first in the laboratory under various conditions of head and discharge before putting the pump into operation [1,18]. In the pumping pipeline system, the criteria for the selection of pumps is mainly based on what best serves the requirements reasonably well of the project such as the efficiency and pumping cost [19,20].…”

Section: Introductionmentioning

confidence: 99%

Modeling the Impact of Pipeline Topography on the Performance of Pumping System

Al-Zaidi¹,

Makki²,

Al-Umar³

et al. 2023

MMEP

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The study consists of building a hydraulic model that can account for the effect of the slope of the pipeline on the pumping system performance. The model system is about a single perforated pipe with several different sizes opening holes equally distributed along the pipe and connected to the pump at the inlet, while the other end of the pipe is closed. The model was applied and implemented in several cases of pipe slope level, uphill, and downhill. Results have been shown for the case of equilibrium between the pump and the pipe system that the pressure head at the beginning of the pipe will increase when is in an uphill slope but inflow decreases because of the deficit in the pressure head and flowrate at the middle and end of the pipe and vice versa. A reasonable agreement between the model and previous studies was achieved for the model validation and accuracy. Also, the study showed that there is a large change in pressure head and flowrate along the pipe due to the change in elevation along the modeled pipe. The capacity of the system decreases in the case of an uphill slope and becomes lesser than the design capacity and decreases with increasing the slope value. More power is needed to adjust the differences between the actual and calculated system curve, and in sequences increase the cost of the pumping and decrease the efficiency of the pump. While in the case of a downhill slope, the capacity of the system is higher than the design capacity. In turn, less power is required to adjust the design operation point and low cost of the pumping, but there is a slight decrease in the efficiency of the pump. Also, the study concluded that the slope of the pipeline is a key issue in the design of the pumping pipeline system to reduce energy consumption and cost. This study can be considered a useful tool to perform the pumping system under various conditions of the hydraulic system.

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Characteristic Curve Prediction of a Commercial Centrifugal Pump Operating as a Turbine Through Numerical Simulations

Cited by 10 publications

References 38 publications

Experimental Study on the Effects of Turbine Blades Types on the Performance of Centrifugal Pump as Pico-Hydropower Generation

Experimental Study on the Effects of Turbine Blades Types on the Performance of Centrifugal Pump as Pico-Hydropower Generation

Influence of Leading and Trailing Edge Angle on Impeller Blades of a Pump as Turbine

Modeling the Impact of Pipeline Topography on the Performance of Pumping System

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