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A device for electricity generation from ocean waves has been developed for installation on the Brazilian northeast coast. It is based on pumping modules and a two-stage accumulator linked to a hyperbaric chamber in order to provide a prescribed high pressure water flow, which operates a turbine coupled with an electrical generator. In the period between 2001 and 2007, wave tank testing of small-scale models have been carried out. A prototype with two pumping modules is presently installed in the Port of Pecem. This paper describes an overview of the device development since the first tests to the installation of the prototype. Wave climate analysis, design analysis and optimization studies have been developed and are briefly revised in this study. Furthermore, control strategies are proposed to optimize the electrical output considering the proper combination of both pressure and flow rate as a function of the predominant wave climate, when the applied pressure is constant and the generator is a synchronous machine.Copyright © 2012 by ASME

This report is a product of the co-operation agreement between Aalborg University and LEANCON (by Kurt Due Rasmussen) on the evaluation and development of the LEANCON wave energy converter (WEC). The work reported here has focused on evaluation of the wave induced loads on the device, based on a desktop study based on available literature, supplemented by laboratory testing of models of the WEC provided by LEANCON.LEANCON, represented by Kurt Due Rasmussen, has been heavily involved in the testing of the device, including the instrumentation, model setup and execution of the tests in the laboratory, all under the supervision of the personnel of the Wave Energy Research Group at Department of Civil Engineering, Aalborg University. This report is a product of the co-operation agreement between Aalborg University and LEANCON (by Kurt Due Rasmussen) on the evaluation and development of the LEANCON wave energy converter (WEC). The work reported here has focused on evaluation of the wave induced loads on the device, based on a desktop study based on available literature, supplemented by laboratory testing of models of the WEC provided by LEANCON.LEANCON, represented by Kurt Due Rasmussen, has been heavily involved in the testing of the device, including the instrumentation, model setup and execution of the tests in the laboratory, all under the supervision of the personnel of the Wave Energy Research Group at Department of Civil Engineering, Aalborg University.

Small scale experiments and numerical simulations have been performed to evaluate a new concept of converter to produce electricity from wave energy. The models, tested in scale 1:10, have been submitted to different regular waves, with height and period representatives of the Brazilian coast, to evaluate the power generation and efficiency. The tests were carried out in a wave basin able to simulate in scale the wave conditions. Software especially written for the simulation of the converter behavior under regular waves has been initially correlated with the experimental results and, later on, it will be employed in parametric studies to estimate the best parameters of the system, in particular the prescribed pressure to be set for the best performance in terms of electricity production.Copyright © 2008 by ASME

Wave energy is a renewable and non-polluting source and its use is being studied in different countries. The paper presents an overview on the harnessing of energy from waves and the activities associated with setting up a plant for extracting energy from waves in Port of Pecem, on the coast of Ceara State, Brazil. The technology employed is based on storing water under pressure in a hyperbaric chamber, from which a controlled jet of water drives a standard turbine. The wave resource at the proposed location is presented in terms of statistics data obtained from previous monitoring. The device components are described and small scale model tested under regular waves representatives of the installation region. Based on the experimental results values of prescribed pressures are identified in order to optimize the power generation.Copyright © 2007 by ASME

Orientador: Prof. Dr. Federico Bernardino Morante Trigoso Dissertação (mestrado) - Universidade Federal do ABC, Programa de Pós-Graduação em Energia, Santo André, 2022. O armazenamento de energia elétrica proveniente de fontes hídricas abastecidas por bombeamento é a tecnologia em escala mais difundida e tecnologicamente consolidada. Provavelmente continuará sendo uma solução competitiva para sistemas de energia modernos baseados na alta penetração de energias renováveis intermitentes, como solar fotovoltaica e eólica. O objetivo geral deste trabalho foi analisar a possibilidade de implementar usinas hidrelétricas por bombeamento com água do mar (UHBAM) no litoral brasileiro. Para isto, foram avaliados quais os melhores locais para construção de uma UHBAM na costa brasileira considerando os impactos ambientais relacionados a este tipo de empreendimento. Para realização do estudo de caso, apresenta se a relação ideal no dimensionamento do reservatório, das bombas e turbinas contendo simulações do fluxo diário de energia e água. Por fim, foi analisada a viabilidade técnica e regulatória relacionadas ao sistema híbrido proposto. Devido ao interesse em aproveitar as águas do oceano, foi adotada a topologia T4 que considera o próprio mar como reservatório inferior. Os resultados do estudo de caso mostram que existem 44 locais na costa litoral de São Paulo que atendem os requisitos de altitude e distância para implementação deste tipo de tecnologia. Hydropower storage (HPS) is the most widespread and mature technology available to store energy. It will probably remain a competitive solution for modern power systems based on high penetration of renewable energies such as photovoltaic and wind power. The main objective of this study is to analyze the possibility for deploying seawater pumped hydro on the Brazilian coast. To achieve this objective, the best suitable locations were analyzed considering the main environmental impacts related to this type of technology. A case study was conducted in order to present the ideal sizing of the reservoir, pumps and turbines, considering daily simulations of water and energy flow. To conclude, the technical and regulatory feasibility related to the proposed hybrid system were analyzed. Due to the interest of utilizing seawater, the T4 topology was adopted, which uses the sea itself as the lower reservoir. The results showed that there are 44 locations on the coast of São Paulo that meet the altitude and distance requirements for the implementation of this technology.