scispace - formally typeset
Search or ask a question

How do different geometries affect performance of wave energy generators? 


Best insight from top research papers

Different geometries have varying effects on the performance of wave energy generators. The oscillating water column-type wave energy extractor was found to be affected by the geometry of the curtain wall and the vortex shedding from its corners, which influenced the primary conversion efficiency . In the case of strain wave gear drives, the simplified and parabolic wave generator geometries showed better mechanical performance in terms of lower average maximum stresses, while the elliptical wave generator provided the lowest average maximum absolute compressive stress . Variations in stator slot geometry were found to impact the torque and speed performance of the machine, with a decrease in slot height resulting in reduced energy losses and an increase in slot width leading to improved net present value of losses . Hull geometry optimization studies for wave energy converters have shown that the definition of the optimization problem and the use of suitable strategies are crucial for achieving meaningful results and supporting device design . The geometrical shape of vibration absorbers in wave energy converters was found to significantly affect hydrodynamic and wave power conversion performance, with different shapes showing advantages in regular and irregular waves .

Answers from top 4 papers

More filters
Papers (4)Insight
The paper reviews different approaches to hull geometry optimization for wave energy converters, but it does not provide specific information on how different geometries affect performance.
The paper investigates the impact of stator slot geometry on the performance of a permanent magnet synchronous generator for wave energy converters. It specifically studies the variations in slot height and width and their effects on torque, speed performance, and annual energy losses. The paper does not directly discuss the impact of different geometries on wave energy generators as a whole.
The paper investigates the effects of air chamber and curtain wall geometries on energy conversion performance in regular wave conditions. It mentions that the geometry of the curtain wall and the vortex shedding from its corners affect the primary conversion efficiency.
The provided paper is about the stress analysis of strain wave gear drives with different geometries of the wave generator. It does not discuss the performance of wave energy generators.

Related Questions

How does wave period affect efficiency or the performance of a turbine that is used in owc operations?5 answersThe wave period significantly influences the efficiency and performance of turbines in Oscillating Water Column (OWC) systems. Research has shown that varying wave periods impact turbine efficiency. For instance, in OWC systems, the turbine's operating conditions are optimized by controlling the rotational speed to maintain proximity to the maximum efficiency point, especially under variable wave conditions. Studies have demonstrated that different wave periods, along with wave heights, affect the power generation capacity of OWC systems, with optimal periods identified for enhanced electrical power output. Additionally, simulations have highlighted the importance of considering wave period properties in designing OWC systems to achieve high absorption efficiency based on specific wave characteristics.
Wave power technologies are still in the development stage, with ongoing research aimed at improving efficiency, reliability, and cost-effectiveness?5 answersWave power technologies are indeed in the development stage, with research focusing on enhancing efficiency, reliability, and cost-effectiveness. Efforts include utilizing artificial intelligence for optimizing wave energy technologies, improving wave predictions, and automating design solutions. Policy analysis reveals a growing interest in wave energy, with China's policies evolving towards more detailed and diversified tools. Methods to estimate future costs of emerging wave energy technologies are crucial, with a proposed three-step approach to enhance cost estimates and counter over-optimism. Various wave energy converters have been designed worldwide, with multi-degree of freedom converters showing good comprehensive performance. Integrating wave power farms with battery storage systems and solar PVs can optimize grid integration and reduce power flow intermittency.
What are the limitations and challenges faced by wave power?5 answersWave power faces several limitations and challenges. Firstly, the fluctuating nature of wave resources requires wave energy converter (WEC) components to be designed to handle loads that are many times greater than the average load, leading to higher costs for power take-off (PTO) systems. Additionally, the interaction with the marine environment poses challenges, as wave power devices can be susceptible to damage and colonization by marine life. Furthermore, the high costs of constructing, deploying, maintaining, and testing large prototypes under harsh environmental conditions hinder the development of wave energy systems. Moreover, the random variability of wave power in different time scales and the lack of clarity on which types of wave energy systems will be successful present challenges for the industry. Finally, the need for additional design requirements, such as battery storage, for practical electrical grid connection can be problematic for sensitive equipment.
How does the vertical component of wave affect the performance of a Wells turbine?5 answersThe vertical component of wave affects the performance of a Wells turbine by causing dynamic stall, which leads to high frequency torque fluctuations, vibration, noise, and potential structural integrity issues. These fluctuations occur during flow deceleration until flow reattachment, and their amplitudes are damped as the flow rate decreases. The oscillations intensify as the amplitude of the oscillating flow rate increases and the wave period decreases. To enhance the performance of the Wells turbine, various methods have been proposed, such as using a triangular casing groove and a rectangular Gurney flap, which increase the lift coefficient and delay stall inception, resulting in increased torque coefficient and expanded operating range. Another approach is the use of spanwise stall cylinders near the blade leading edge, which delay stall by interacting with vortices near the boundary layer and guide the flow near the suction side, leading to increased operation range and maximum torque coefficient.
How do wave mitigation barriers affect the performance of high speed trains?3 answersWave mitigation barriers have been studied to reduce the detrimental effects of high-speed train-induced vibrations. Different types of barriers, such as expanded polystyrene (EPS) blocks, hysteretic vibration absorbers, open trenches, and geofoam barriers, have been investigated for their effectiveness in mitigating ground vibrations. The implementation of EPS blocks as partial fill material of embankment slopes has shown promise in reducing vibrations. Hysteretic vibration absorbers, consisting of a light mass attached to the main structure, have been found to be effective in reducing barrier vibrations when the two oscillators are close to resonance conditions. Open trenches have been shown to have higher mitigation capacities compared to in-filled trenches, and using double-trench barriers instead of single-trench barriers enhances the mitigation capacity. Geofoam barriers have also been found to be effective in reducing ground vibrations, with double geofoam barriers providing better mitigation than single barriers. Overall, these wave mitigation barriers have shown potential in reducing the performance of high-speed trains.
How does wave energy affect bivalves?5 answersWave energy affects bivalves in different ways depending on the species. Wave action stimulates burrowing activity in some bivalve species such as Macoma balthica, Spisula subtruncata, Cardium edule, and Mya arenaria, causing them to start burrowing and continue for longer periods of time. However, wave action inhibits burrowing activity in other species like Nuculana pernula and Nucula nucleus, which live in places with less risk of being washed out. In addition to burrowing, wave energy can also impact the reproductive success and recruitment of bivalves. For example, changes in wave climate due to wave and tidal current interactions can lead to variations in wave height and wave power, potentially affecting the reproductive output and recruitment of mussels. Overall, the effects of wave energy on bivalves are species-specific and can influence their behavior, burrowing activity, and reproductive success.