Sustainable Energy Technologies and Assessments, Journal Year: 2024, Volume and Issue: 72, P. 104056 - 104056
Published: Nov. 2, 2024
Language: Английский
Journal of Marine Science and Engineering, Journal Year: 2024, Volume and Issue: 12(7), P. 1038 - 1038
Published: June 21, 2024
Previous studies have introduced a resonant caisson designed to enhance wave energy extraction in regions with low density; however, its operational mechanism remains poorly understood. This paper seeks elucidate the of by leveraging Star-CCM+ for Computational Fluid Dynamics (CFD) simulations, focusing on influence guides and their dimensions water levels, flow velocities, vortex dynamics. The findings demonstrate remarkable wave-amplification capabilities caisson, maximum amplification factor reaching 2.31 at calculated frequency absence guides. Incorporating expanding radii substantially elevate rates, accelerate currents, alter patterns, thereby further enhancing factor. study will provide reference optimizing design caissons converters based caissons, thus promoting effective use resources.
Language: Английский
Citations
1
Protection and Control of Modern Power Systems, Journal Year: 2024, Volume and Issue: 9(6), P. 122 - 142
Published: Nov. 1, 2024
Fully harnessing the ocean wave's renewable energy resources could benefit coastal countries. However, wave harvesting systems encounter several challenges, i.e., marine uncertainties, long-distance mainte-nance, power fluctuations, irregular currents, non-linear generator dynamics, turbine limitations, cost optimization, and smoothing issues. To overcome these this paper proposes a new multi-stage con-trol design approach for performance evaluation of os-cillating water column (OWC)-based conversion (OWEC) system. The first stage optimizes Wells by implementing an efficient airflow control strategy. It achieves maximum power-harvesting ability eliminating stalling phenomena. In second stage, we investigate robustness permanent magnet syn-chronous generator-based OWEC system designing adaptive back-stepping controllers, taking into account Lyapunov stability theory. accomplishes precise speed regulation optimal extraction while delivering reduced delay response percentage errors. ensure system's availability, third incorporates fault-ride-through capabilities. executes fault reconfig-urable parallel converter configuration, elimi-nating only faulty leg instead entire con-verter. fourth supercapacitors-based management smoothing, even when OWC plant output fluctuates. We accomplish model predictive Finally, Matlab/Simulink results verify that presented mul-ti-stage is effective approach, offering optimal, robust, reliable, power-smoothing solution.
Language: Английский
Citations
1
IEEE Access, Journal Year: 2024, Volume and Issue: 12, P. 174371 - 174386
Published: Jan. 1, 2024
Language: Английский
Citations
1
Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 503, P. 158399 - 158399
Published: Dec. 10, 2024
Language: Английский
Citations
1
Sustainable Energy Technologies and Assessments, Journal Year: 2024, Volume and Issue: 70, P. 103964 - 103964
Published: Sept. 13, 2024
Language: Английский
Citations
1
ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: unknown
Published: Sept. 19, 2024
Here, we report an osmotic power generator (OPG) using a restacked membrane of vanadium pentoxide (V
Language: Английский
Citations
0
Published: Jan. 1, 2024
Energy harvesting is a promising solution for the realization of self-powered Wireless Sensor Nodes (WSNs), minimizing battery waste and environmental impact. The devices studied in this paper are gravitational vibration-based energy harvesters (GVEHs), converting ultra-low-frequency ambient vibrations structures or vehicles into electric power. main efficiency losses related to AC/DC rectification storage processes. Experimental tests confirm optimized layout Negative Voltage Converter (NVC) using MOSFETs Schottky diode with 1000μF smoothing capacitor, achieving power efficency 65%. rectified smoothed stored Li-Ion 3.6V 40mAh coin cell supplied load, consisting 3.3V micro-controller unit, temperature sensor sub-GHz wireless communication module. A nano boost charger buck converter manages between load. charge performed charging evaluation at different external excitation amplitudes frequencies. WSN average consumption analyzed master-slave signal strenghts relative distances nodes. Finally, duty cycle active sleep phase defined guarantee continuous activity net positive battery.
Language: Английский
Citations
0
Published: Jan. 1, 2024
Language: Английский
Citations
0
Sensors, Journal Year: 2024, Volume and Issue: 24(14), P. 4531 - 4531
Published: July 13, 2024
Converting otherwise wasted kinetic energy present in the environment into usable electrical to power wireless sensor nodes, is a green strategy avoid use of batteries and wires. Most harvesters presented literature are based on exploitation one-degree-of-freedom arrangement, consisting tuned spring-mass system oscillating main direction exciting vibration source. However, if excitation changes, efficiency harvester decreases. This paper thus proposes idea curved cantilever beam with two-degree-of-freedom where two bending natural frequencies mechanical resonator designed be equal. thought lead configuration design that can used practical circumstances varies its plane. This, turn, may possibly more effective energy-harvesting solution nodes network.
Language: Английский
Citations
0
Journal of Marine Science and Application, Journal Year: 2024, Volume and Issue: unknown
Published: Oct. 29, 2024
Language: Английский
Citations
0