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Showing 6 results for Wave Energy Converter

Mohamadreza Negahdari, Hossein Dalayeli, Mohammad Hassan Moghadas, Hassan Ghassemi, Taghi Aliakbari,
Volume 16, Issue 31 (4-2020)
Abstract

Sea waves are an important source of environmental energy which can be converted into energy needed for different purposes. In current study, a floating-point absorber (FPA) wave energy converter is simulated, built, and tested. The system is modeled through a two-body system with two degrees of freedom in the heave direction. Modeling hydrodynamic system has been done in ANSYS-AQWA software. In order to obtain the resonance condition and the maximum power of the system, the values of the hydraulic parameters were determined based on optimal PTO coefficients. The experimental data was used to validate the results presented in this paper.

Peyman Keshavarz Ab Parde, Masih Zolghadr, Seyed Mohammad Ali Zomorodian,
Volume 17, Issue 34 (12-2021)
Abstract

One of the most important policies of water-scarce countries such as Iran is the desalination of seawater for industrial, agricultural and drinking use. Before desalinating seawater, it needs to be transferred, which is a costly process. In this research, the flap-type wave energy converter was considered to provide the necessary energy to transfer seawater to a desalination plant by merely using wave energy. For this purpose, the effects of wave energy converter parameters (paddle width and height), flow properties (water depth and wave frequency), and the slope of the shore on the performance of the wave energy convertor were investigated in a laboratory study. Although the efficiency naturally increased with increasing width of the flap, it should not exceed a certain limit. In short, with 35% and 71% increase in the width of the flap, the output pressure increased 1.58 and 2.82 times, respectively. An increase of 13% and 27 % in water depth first led to a maximum increase of 3.44 times in water pressure and then led to a decrease of a maximum of 1.68 times. Experiments with the height of the flap also showed that when the rotating flap was non-submerged, the water pressure of the device was at least 2.05 times higher than that in its submerged state. For the slope of the shore, with 63% increase in slope (from 1: 5 slope to 1: 3 slope), the pressure increased by 47.25%, and when the slope was increased five times (from 1: 5 slope to vertical slope), the pressure increased by 2.14 times.  For the period of the wave, with a 15% increase in the period, the pressure decreased by 17.02%, and for a 25% increase in the period, the pressure decreased by 81.58%. In this study, a total of 165 experiments were performed and the flap-type wave energy converter was evaluated as a suitable and low-cost method for transferring seawater to shore.

Mohammad Hossein Jahangir, Hamid Farajpour, Ali Shahabi Nejad,
Volume 18, Issue 35 (5-2022)
Abstract

Supplying electricity to remote villages that do not have access to the electricity grid has always been a major challenge. Hybridization of renewable resources available in that rural area can be considered as a solution to this challenge.  In the present study, due to the proximity of the study area to Oman Sea and access to suitable wave power for supplying electricity, three types of Wave Energy Converters have been hybridized in Homer Software with solar systems, diesel generators, and batteries. Then, by comparing them, the superior Wave Energy Converter is selected. These Wave Energy Converters, including Pelamis, Wave Dragon, and AquaBuoy, were compared on a 4085 kW photovoltaic system, 9,000 kW diesel generator, and 197 100 kWh batteries to provide a certain amount of electrical load. Finally, the system including Wave Dragon with the energy production cost of 0.240 $ / kWh was chosen as a better economic system.

Mohammad Hossein Jahangir, Afshin Badrloo,
Volume 19, Issue 39 (9-2023)
Abstract

The present study is for the feasibility of using the OWC wave energy converter to supply electrical power to a refinery unit near the shores of the Persian Gulf over a 20-year horizon. Considering the potential of other renewable energy sources in the study area, a combined system of wind turbine, photovoltaic panel, wave converter, electrolyzer, battery and fuel cell is proposed. A comparison between using a reformer instead of an electrolyzer has also been studied. The effect of OWC energy converters on the hybrid system has been evaluated as a new approach in generating the required power. The results show that the hybrid system including the OWC converter with NPC and COE costs $ 26.5 and $ 0.205, respectively, is more cost-effective than the hybrid system without the OWC converter to meet the refinery unit power demand. About 30.7% of the required power is supplied by the wave energy converter. The use of wave energy converters is reduced in the months with low wave energy potential and the role of other renewable energy sources becomes more colorful.

Ehsan Arbabi, Abuzar Abazari,
Volume 19, Issue 41 (12-2023)
Abstract

The increase of world demand for energy and global warming challenges due to fossil oil are the reasons that motivate the researches for studying the renewable energy technologies. One of the clean renewable energy resources with high potential is ocean waves. Various type of wave energy converters have been suggested by researchers up to now. Flap type surge oscillating wave energy converter is one of those. In the present research, this WEC is simulated in Ansys Aqwa based on the potential flow and solution of Laplas equation. The hydrodynamic coefficients and excitation moment are calculated through frequency response analysis. Then these are used as inputs in Matlab software for solving of governing dynamic equations. The effects of variable optimum PTO damping and width, height of flap and flap geometry on the extracted power density are investigated. Furthermore, a new design of modular flap is proposed and the effect of modules’ orientation on the output power density is discussed.
Fatemeh Kamal, Abuzar Abazari, Reza Dorostkar,
Volume 20, Issue 42 (4-2024)
Abstract

The use of offshore wind turbines has attracted the attention of researchers recently. For enhancing the performance of power generation, the combination of these platforms with wave energy converters has been investigated. The integrated design of an oscillating surge WEC with a semi-submersible offshore platform has less been considered. Moreover, the effect of flap dimensions and wave direction on the dynamic response in roll, pitch, heave surge direction, and output power has not been studied which is investigated in the present study. The results confirmed the effectiveness of the hybrid system on vibration reduction and power production compared to the alone platform. The flap width is more effective than height and thickness on power production and platform response. The output power of 1000 kw can be generated depending on the flap dimension of the wave period. Furthermore, the dynamic response decreases up to 30% in hybrid design indicating the higher stability of the platform when attaching to WECs.



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