CFD model and experimental verification of water turbine integrated with electrical generator

Borkowski, Dariusz; Węgiel, Michał; Ocłoń, Paweł; Węgiel, T.

doi:10.1016/j.energy.2019.07.091

Cited by 28 publications

(19 citation statements)

References 13 publications

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“…The solid model of impeller and diffuser are shown in Figure 2. on the other hydraulic machines, including Francis turbine [36][37][38], water turbine [39], and tidal turbine [40]. At present, there are relatively few studies on the influence of end clearance on the performance of ESP.…”

Section: Geometry Modelmentioning

confidence: 99%

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Numerical Investigation of a High-Speed Electrical Submersible Pump with Different End Clearances

Zhou

Wang

Hang

et al. 2020

Water

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The end clearance of the impeller is one of the most important structural parameters in the hydraulic design of a high-speed electrical submersible pump (ESP). In this paper, an ESP with a rotating speed of 6000 r/min was taken as the research object. Numerical calculations were carried out for five different end clearance conditions of 0.1 mm, 0.3 mm, 0.6 mm, 0.9 mm, and 1.2 mm, respectively, to obtain the performance and internal flow field under different situation. The simulation results were verified by the pump performance experiment. It showed that the increase of the end clearance led to a decrease of the head and efficiency of the electrical submersible pump. Through the analysis of the internal flow field, it was found that the existence of the end clearance reduced the flow rate and caused free pre-whirl. With the increase of the end clearance, the phenomenon of de-flow in the diffuser passage was aggravated, which further reduced the performance of the electrical submersible pump. Finally, the reasonable recommended value of the end clearance was given, which facilitated the optimization design and engineering application of the high-speed ESP.

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Section: Geometry Modelmentioning

confidence: 99%

“…They found that k-ε and k-ω are most suitable for internal flow and performance prediction. Furthermore, as a powerful simulation method, CFD approach was applied on the other hydraulic machines, including Francis turbine [36][37][38], water turbine [39], and tidal turbine [40].…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of a High-Speed Electrical Submersible Pump with Different End Clearances

Zhou

Wang

Hang

et al. 2020

Water

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“…Furthermore, as a demonstration of the growing interest in low net heads, several works have recently been developed concerning the analysis of small hydraulic turbines considering microturbines [7], small turbines [8], and also innovative components [9].…”

Section: Introductionmentioning

confidence: 99%

Optimized Design of a Novel Hydraulic Propeller Turbine for Low Heads

Barsi

Ubaldi

Zunino

et al. 2021

Designs

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In the present paper, an optimized design procedure capable of providing the geometry of a high efficiency compact hydraulic propeller turbine for low head is proposed and developed. The turbine preliminary design is based on fundamental turbomachinery mean-line equations and on the employment of statistical correlations, which relate the main geometrical parameters to the fundamental design parameters. The first obtained geometry represents the starting point of an automated aerodynamic single point optimization procedure based on a genetic algorithm generating and updating a wide database of turbine geometries. The approach employs a three-dimensional (3D) Reynolds averaged Navier–Stokes (RANS) solver for the construction of the corresponding database of performance. A meta-model, such as an artificial neural network (ANN), is used to speed up the design optimization process. The procedure has been applied on the practical case of a novel simplified hydraulic propeller turbine prototype for very low heads. The adopted design optimization procedure is able to modify the turbine blade and vane geometries in order to achieve automatically the targeted net head and the maximum for the total to total internal efficiency once diameter, mass flow rate, and rotational speed are assigned.

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“…In a study of SHP, Ma et al conducted a study on runners to develop general purpose 2.5 kW micro-water vehicles [10]. Borkowski et al validated computational fluid dynamics (CFD) on SHP with electrical generator integrated with experiments, and the main results were the mechanical power losses in the hydro-set gap and selection of suitable turbulence model [11]. Huidong et al conducted a study on the possibility of replacing composite runner blades and mechanical stainless steel runner blades as a way to increase the economics of SHP in stream sites [12].…”

Section: Introductionmentioning

confidence: 99%

“…Figure11. Different losses in the hydraulic turbine (P w = hydraulic power, P s = shaft power, and P G = generator power).…”

mentioning

confidence: 99%

Development of a Hydropower Turbine Using Seawater from a Fish Farm

et al. 2021

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Discharge water from fish farms is a clean, renewable, and abundant energy source that has been used to obtain renewable energy via small hydropower plants. Small hydropower plants may be installed at offshore fish farms where suitable water is obtained throughout the year. It is necessary to meet the challenges of developing small hydropower systems, including sustainability and turbine efficiency. The main objective of this study was to investigate the possibility of constructing a small hydropower plant and develop 100 kW class propeller-type turbines in a fish farm with a permanent magnet synchronous generator (PMSG). The turbine was optimized using a computer simulation, and an experiment was conducted to obtain performance data. Simulation results were then validated with experimental results. Results revealed that streamlining the designed shape of the guide vane reduced the flow separation and improved the efficiency of the turbine. Optimizing the shape of the runner vane decreased the flow rate, reducing the water power and increasing the efficiency by about 5.57%. Also, results revealed that tubular or cross-flow turbines could be suitable for use in fish farm power plants, and the generator used should be waterproofed to avoid exposure to seawater.

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CFD model and experimental verification of water turbine integrated with electrical generator

Cited by 28 publications

References 13 publications

Numerical Investigation of a High-Speed Electrical Submersible Pump with Different End Clearances

Numerical Investigation of a High-Speed Electrical Submersible Pump with Different End Clearances

Optimized Design of a Novel Hydraulic Propeller Turbine for Low Heads

Development of a Hydropower Turbine Using Seawater from a Fish Farm

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