Numerical Approach of the Blade Shape and Number on the Performance of Multiple Blade Closed Type Impulse Wind Turbine

Sasongko, Herman; Mirmanto, Heru; Bangga, Galih; Nugrahani, Elita Fidiya; Pasaribu, Johnson

doi:10.21776/mechta.2023.004.02.11

Cited by 3 publications

(1 citation statement)

References 5 publications

(7 reference statements)

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“…With these various disadvantages, many researchers have carried out developments on the shell side, one of which is by varying the baffle design [7] [8] . With the development of numerical computing, researchers can easily see phenomena that occur in fluid flow [9] . As done by Gu, Luo, et al [10] conducted numerical method research regarding baffle variations called trapeziodal-like tilted baffles.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Shell and Tube Heat Exchanger Design With Inclined Baffles

Rahman,

Winarto,

Siswanto

2024

MECHTA

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Shell and tube heat exchanger (STHeX) design development continues to be carried out to increase the effectiveness of a system. One way is to investigate the optimal baffle design. The new structure of STHeX with Inclined-Segmental Baffles is further investigated. The experiment was carried out using the numerical method Computing Fluid Dynamics (CFD) software with three-dimensional modeling. The results show that the heat change coefficient value is lower than conventional STHeX, However, the pressure drop value is reduced quite significantly. Therefore, it is necessary to know the overall heat transfer coefficient value per pressure loss (U/DeltaP). Hence, we get U/DeltaP values of 0.9 and 0.68 for STHeX with Inclined-Segmental Baffle and conventional STHeX, respectively. Thus, there is a significant increase ranging from 37-34%. It is concluded that STHeX with Inclined-Segmental baffles increases the U/DeltaP value significantly compared to conventional STHeX.

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Section: Introductionmentioning

confidence: 99%

Optimization of Shell and Tube Heat Exchanger Design With Inclined Baffles

Rahman,

Winarto,

Siswanto

2024

MECHTA

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The Effect of Deflector Angle on the Performance of Turbine Combination Darrieus-Savonius

Irfin,

Adiwidodo,

Yudiyanto

et al. 2024

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The Savonius and Darrieus are vertical-axis wind turbines. This turbine has resistance on one side of the blade that makes it difficult for the shaft to rotate resulting in reduced efficiency. However, the vertical shaft turbine type provides the advantage of being able to accept wind speeds from any direction without an additional tail. Savonius and Darrieus turbines show different characteristics in terms of their performances. Savonius turbine has a high power coefficient (CP) in the range of low tip speed ratio (TSR), when its TSR increases the CP will fall. In contrast to Darrieus, high CP is achieved if the TSR is also high but the CP achievement will fall at a low TSR. If it is compared to Savonius, Darrieus has higher power efficiency although it is difficult to self-start. In contrast to Savonius, Darrieus has a better self-starting ability but a lower efficiency. This study aims to improve the performance of vertical shaft wind turbines by creating a new design combination of Darrieus and Savonius turbines with deflectors to produce CP achievement on a wide TSR. The combination of the Darrieus-Savonius turbine is to improve efficiency to make self-start easier. The research method uses numerical simulation by employing CFD Ansys software. On the airfoil with a deflector angle of 70 deg, it shows that there is an increase in speed in several parts of the Darrieus blade airfoil. The increase in speed causes the decrease of static pressure in the area. The pressure difference between the sides of the airfoil surface causes a force. The direction of the force causes the turbine shaft to rotate. The deflector acts as a directional headwind, increasing the local flow velocity to counter the resistance on one side of the rotor blades The average torque produced at an angle of 70 deg is 0.5 Nm. Whereas, at an angle of 90 deg, the average torque generated is lower by around 0.15 Nm.

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Development of Savonius Rotor Based on Bezier Curve for Vertical Axis Marine Current Turbine at Sunda Strait, Hindia Ocean

Suprayogi,

Setiawan,

Habibie

et al. 2024

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Due to its strategic location and ocean currents, the Sunda Strait has the potential to produce energy that might be used as a source of electricity. As a result, this strait area urgently needs a suitable turbine design. This strait's most significant sea current speed is 1 (one) m/s. The Savonius rotor is one of the rotor kinds of turbines that can operate in the slow sea current—modifying the rotor from semi-circular to use the Bezier curve for the shape to optimize the performance. This paper will discuss the design of the Savonius rotor using the Bezier curve, that have improved performance. The rotor with double stacking will also enhance the performance of the rotor. This design is a novelty for vertical marine current turbine applications in ocean renewable energy.

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Numerical Approach of the Blade Shape and Number on the Performance of Multiple Blade Closed Type Impulse Wind Turbine

Cited by 3 publications

References 5 publications

Optimization of Shell and Tube Heat Exchanger Design With Inclined Baffles

Optimization of Shell and Tube Heat Exchanger Design With Inclined Baffles

The Effect of Deflector Angle on the Performance of Turbine Combination Darrieus-Savonius

Development of Savonius Rotor Based on Bezier Curve for Vertical Axis Marine Current Turbine at Sunda Strait, Hindia Ocean

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