Free-Spinning Numerical Simulation of a Novel Vertical Axis Small Water Turbine Generator for Installation in a Water Pipeline

Lahamornchaiyakul, Werayoot; Kasayapanand, Nat

doi:10.37934/cfdl.15.8.3149

Cited by 3 publications

(2 citation statements)

References 19 publications

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“…u j represents the velocity component in the corresponding direction. The elements described for the k-ε turbulence model were obtained from [33][34][35][36][37]. The species conservation model is presented in Eq.…”

Section: Fig 1 Synthesis Gas Production In Percentagesmentioning

confidence: 99%

Energy Evaluation of Synthesis Gas in a Turbocharger System Employing CFD Tools

Jorge Alvarez,

Jonathan Fabregas Villegas,

Mauricio Márquez

et al. 2024

CFDL

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Renewable energy sources derived from biomass, such as synthesis gases, represent an opportunity to take advantage of available waste resources and contribute to global energy rationing. This study developed an analysis with computational fluid dynamics (CFD) to estimate the energy behavior of synthesis gases through a turbocharger system. The synthesis gas used to drive the turbocharger turbine was extracted from the gasification of biomass from the Colombian Caribbean. The application of models for rigid body motion, as well as models of momentum, turbulence, energy, and conservation transport of species, suggest that the energy potential available by the turbine ranges from 0.4 kW to 5.2 kW of power generation, concerning mass flow rates entering the simulated system. The main findings of the study were temperature profiles, speed profiles, rotational speed variation, torque, and mechanical power generated in the turbocharger. It is emphasized that the synthesis gas studied presents a good behavior to generate energy through a turbine system of a turbocharger device.

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Section: Fig 1 Synthesis Gas Production In Percentagesmentioning

confidence: 99%

Energy Evaluation of Synthesis Gas in a Turbocharger System Employing CFD Tools

Jorge Alvarez,

Jonathan Fabregas Villegas,

Mauricio Márquez

et al. 2024

CFDL

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“…The popular rotors in the category of the cross flow rotors are Savonius rotor, Darrieus rotor and Gorlov rotor. Lately, Lucid developed cross flow spherical rotor to be installed within a pipeline to gather excess energy, which is available in the gravity-fed water pipelines [6]. In order to improve the efficiency of the cross flow rotors, the optimization of these systems is becoming necessary.…”

Section: Introductionmentioning

confidence: 99%

Effect of the Turbulence Model on the Computational Results of a Lucid Spherical Rotor

Mabrouk Mosbahi,

Mariem Lajnef,

Mouna Derbel

et al. 2024

ARFMTS

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Due to the excessive increase in the energy demand, renewable energy has become an alternative for electricity production for industrial and domestic needs. Water energy has received significant investment as a sustainable and clean energy source. Lucid spherical rotors, a kind of hydro-power converter, are cross flow rotors designed to be mounted within a pipeline in order to gather excess energy available in gravity-fed water pipelines. This paper focuses on the effect of the numerical model parameters choice, namely the turbulence model, on the Lucid spherical rotor hydrodynamic characteristics. Numerical simulations were carried out through Ansys Fluent software 17.0 using the unsteady Reynolds-Averaged Navier-Stokes (URANS) equations. Four turbulence models: RNG k-ε, Realizable k-ε, SST k-ω and transition SST were tested. Performance characteristics in terms of torque and power coefficients in addition to hydrodynamic features of the flow around the considered rotor were analyzed. The adopted numerical model was validated based on previous experimental findings from the literature. It was found that the realizable k-ε model showed a good agreement with experimental results. Thus, it was adopted for the Lucid spherical rotor simulation. The obtained findings could provide further direction for researchers to use the Lucid spherical water turbine.

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Numerical simulation of a novel small water turbine generator for installation in a deep-flow hydroponics system

Lahamornchaiyakul

2023

Int. J. Renew. Energy Dev.

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Hydroponics systems are crucial for providing sustainable and cost-effective choices when soils are unavailable for conventional farming. The application of water flow rates within hydroponics systems to generate electricity is another idea that can be used in the field of power generation. This paper presents the determination of the mechanical power efficiency of a novel small water turbine generator for use in a deep-flow hydroponics system (DFT). The system was designed, analysed, and calculated for the most suitable geometries of the water pipeline inlet, DFT system, main structure of the PVC Tee Pipe Fitting, and a water turbine wheel using computational fluid dynamics software. The diameter of the water turbine wheel in this research was 48 mm. A DFT hydroponic system was modelled for the purposes of this research. We conducted a numerical simulation with water flow rates of 6, 8, and 10 l/min to evaluate the turbulent kinetic energy distribution in the DFT hydroponic system. The numerical simulation employed the control volume methodology, and the k-epsilon turbulence model was applied to obtain the computational conclusions. The highest torque and power that a novel small water turbine for installation in a DFT system could generate at a maximum flow rate of 0.000167 m3/s were 0.082 N.m. and 1.9568 watts, respectively. The forces generated by the fluid's speed and pressure can then be transferred to the building process of a novel small water turbine wheel. The FEA numerical result shows that the maximum value of the total deformation at a wheel speed of 228 rpm is 7.0 x 10-5 mm. The numerical simulations used in this study could potentially be used to further develop prototypes for innovative miniature water turbines that generate commercial electricity.

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Free-Spinning Numerical Simulation of a Novel Vertical Axis Small Water Turbine Generator for Installation in a Water Pipeline

Cited by 3 publications

References 19 publications

Energy Evaluation of Synthesis Gas in a Turbocharger System Employing CFD Tools

Energy Evaluation of Synthesis Gas in a Turbocharger System Employing CFD Tools

Effect of the Turbulence Model on the Computational Results of a Lucid Spherical Rotor

Numerical simulation of a novel small water turbine generator for installation in a deep-flow hydroponics system

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