The Optimal Pitch Distance for Maximizing the Power Ratio for Savonius Turbine on Inline Configuration

Ismail, Ismail; Rahman, Reza Abdu; Haryanto, Gunady; Pane, Erlanda Augupta

doi:10.20508/ijrer.v11i2.11862.g8181

Cited by 7 publications

(4 citation statements)

References 15 publications

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“…It helps reduce the risk of energy crisis and mitigate climate change. Sustainable effort in the wind energy sector leads to a significant improvement in capacity, which reduces energy costs [1]. Combining the renewable sector with wind and solar energy provides positive outcomes, which make the system applicable in various sectors.…”

Section: Introductionmentioning

confidence: 99%

Charge Assessment for Nitrate-Based Salt as a Phase Change Material for a Medium-Temperature Latent Storage Tank

Ismail,

Widodo,

Rahman

2024

Latvian Journal of Physics and Technical Sciences

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The present study assesses the heat characteristic of the nitrate-salt mixture as a phase change material (PCM) for a medium-temperature latent storage system (LSS). Two binary and ternary mixtures are evaluated, which demonstrate different thermal behaviour. The highest melting and latent heat capacity is obtained by KNO3(0.4)/NaNO3(0.6) at 223.8 °C and 161.5 J/g. However, it has a higher supercooling degree with a partial phase transition between 217.6 °C and 251.5 °C, making it unfeasible for a medium-temperature LSS tank. The ternary mixture (TM) with NaNO2(0.4)/KNO2(0.53)/NaNO3(0.7) demonstrates a stable phase transition with minimum partial phase transition (22.1 °C) and suitable heat of fusion (98.1 J/g). Further evaluation through static thermal profiling demonstrates that the TM has a notable performance during solid-sensible charge with a charge level indicator (CLI) around 45.3 %–49.1 %. The TM can be charged up to 85.7 % until the end stage of the phase transition. It promotes a better storage capacity with suitable performance since the system can be charged effectively at a suitable temperature range (< 160 °C) for various applications. The micrograph observation indicates some dispersed particles and local agglomeration, which makes phase stabilization as an advantageous method to promote a stable phase change process. The TM can be considered a suitable PCM for a medium-temperature LSS tank that allows for a better solar thermal renewable system operation.

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Section: Introductionmentioning

confidence: 99%

Charge Assessment for Nitrate-Based Salt as a Phase Change Material for a Medium-Temperature Latent Storage Tank

Ismail,

Widodo,

Rahman

2024

Latvian Journal of Physics and Technical Sciences

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“…Tremendous wind energy is used in open spaces such as remote or offshore countryside using large-scale Horizontal Axis Wind Turbines by Manganhar et al, [3]. Due to fast and cost-effective production costs, many aerodynamic theories were implemented on Vertical Axis Wind Turbine type by Ismail et al, [4]; and C M et al, [5]. Raynaud's effect on the slotted Savonius turbine.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Vertical Axis Wind Turbine Performance with Savonius Rotor on Air Ejector Dimensions using Computational Fluid Dynamics

Ismail,

Rinawati,

Imam Muzaki

2024

CFDL

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This study evaluates the tsunami forces exerted on a terrestrial structure caused by a collision-induced tsunami. Conventionally, assessing these forces relies on the inundation depth of the colliding tsunami passing without the presence of the terrestrial structure. However, it is essential to consider the inundation depth and incident fluid velocity, as both significantly influence the resulting tsunami forces. In this research, ANSYS Fluent 17.2 is employed to simulate excitation sources using a Defined Function (UDF) code within a C++ framework. The dynamic meshing technique is adopted to replicate the interactions between the bore pressure of the tsunami and an idealised vertical wall structure across three distinct water levels. Computational Fluid Dynamics (CFD) modelling demonstrates the proposed methodology's capability to offer precise impact pressure distributions concerning geographical and temporal aspects. The findings reveal specific instances: at a water depth of 10 m, the maximum Froude number is attained at 3.5 and 6.9 seconds, corresponding to a maximum pressure value of 3.9x105 Pa at 3.85 seconds for a water flow velocity of 20 m/sec. Similarly, for a water depth of 12 m, the most significant Froude number is observed at 3.95 and 6.9 seconds, with a peak pressure value of 1.8x105 Pa at 4.6 seconds, associated with a water flow velocity of 15 m/s. Additionally, at a water depth of 14 m, the maximum Froude number is reached at 4.95 and 7.1 seconds, accompanied by a maximum pressure value of 7.4x104 Pa at 4.85 seconds for a water flow velocity of 10 m/s.

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“…On the other hand, the utilization of renewable energy sources based on hydropower, solar and wind energy are escalated and taken as a promising method to sustain the clean energy system. It can specifically address the success story of wind power for electricity production, which contributes to a substantial portion of the global energy mix [2]. Solar energy plays in broader aspects besides electric production since it can be used as suitable thermal power generation for industrial and residential sectors [3].…”

Section: Introductionmentioning

confidence: 99%

Evaluation on the Discharging Rate and State of Health of Paraffin/HDPE after 10,000 Thermal Cycling under Various Charging Speed

Suyitno¹,

Rahmalina²,

Ismail³

et al. 2023

IJHT

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Fast-charging mode thermal energy storage (TES) can be obtained by improving the average heat transfer rate of the system. However, it leads to the risk of performance deterioration for the long-term operation. The impact of charging rate for paraffin and FS-Paraffin (form-stable paraffin) is evaluated in the present work. The heating/cooling process is repeated for 10,000 cycles with different charging rate (1℃/min, 5℃/min and 10℃/min). The performance is focused on the discharging rate and thermal decomposition. It shows that the fast-mode treatment causes a severe deceleration in the discharging speed. The lowest discharging rate of paraffin is obtained at 0.64℃/min. The FS-Paraffin is generally better to withstand from thermal deterioration. It has a suitable discharging rate (0.82℃/min) with the lowest state of health (SoH) percentage of 97.3%. It implies that the presence of polymer additive (20 wt% high-density polyethylene) for FS-Paraffin reduces the impact of fast-charging operation. Further evaluations are discussed in the article, including the impact on SoH, thermal conductivity and storing performance. The overall condition indicates that thermal deterioration likely occurred during the fast-mode operation and requires extensive protection to maintain the long-term operation of the TES material.

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The Optimal Pitch Distance for Maximizing the Power Ratio for Savonius Turbine on Inline Configuration

Cited by 7 publications

References 15 publications

Charge Assessment for Nitrate-Based Salt as a Phase Change Material for a Medium-Temperature Latent Storage Tank

Charge Assessment for Nitrate-Based Salt as a Phase Change Material for a Medium-Temperature Latent Storage Tank

Investigation of Vertical Axis Wind Turbine Performance with Savonius Rotor on Air Ejector Dimensions using Computational Fluid Dynamics

Evaluation on the Discharging Rate and State of Health of Paraffin/HDPE after 10,000 Thermal Cycling under Various Charging Speed

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