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- Khan et al.
Electricity is the base of development of a country and the need of electricity is increasing every moment. Developing countries like Bangladesh are facing severe energy crisis. Most of the power generation in Bangladesh is based on natural gas and fossil fuel which makes it hard to meet the increasing demand. As a tropical country, Bangladesh is blessed with renewable energy resources all…
- Yates et al.
Some previous work has made optimistic claims about the potential energy gains that could be made by using pumping with tidal range structures (barrages, lagoons and offshore tidal impoundments). This paper explores the factors influencing whether such gains can be realised for positive head pumping (pumping once water levels have equalised), using 0-D modelling concepts.
- Kolekar and Banerjee
An optimization methodology for a stall regulated, fixed pitch, horizontal axis hydrokinetic turbine is presented using a combination of a coupled hydro-structural analysis and Genetic Algorithm (GA) based optimization method. Design and analysis is presented for two different designs: a constant chord, zero twist blade, and a variable chord, twisted blade. A hybrid approach is presented…
- Thake
Seaflow has been a project to develop and test a commercially-sized marine current turbine. The turbine was installed in the summer of 2003 off Foreland Point, near Lynmouth on the North Devon coast of England. The objectives of the project were to test the feasibility of constructing and operating such a machine, to ascertain whether the performance would be as predicted, and to evaluate the…
- Akimoto et al.
The cost of utilizing kinetic energy of river stream, tidal and ocean current is considered to be higher than that of wind power generation because of difficulties in construction and maintenance of devices installed in seawater. As a solution to the problem, the authors propose a new concept of water stream turbine. The main idea is in the manner of supporting turbine. Although it is similar…
- Abundo et al.
This paper combines site and device suitability approaches into one framework to assist stakeholders in identifying locations fit for Tidal In-Stream Energy (TISE) extraction as well as nominating devices that are matched to the conditions of those locations. A Matlab-based decision support system is developed using the framework. Site-Device matching is performed considering resource data,…
- Zupone et al.
In the 2009, the team DIMEG (Department of Mechanical, Energetic and Management Engineering) and SintEnergy srl begun several studies for developing an innovative kinetic turbine working on tidal currents. The machine had to be easy to realize and install, but, at same time, able to capture the maximum allowable energy from the tidal flow even with low speeds and bidirectional currents.
… - Li
During the last decade, the development of tidal current industries has experienced a rapid growth. Many devices are being prototyped. For various purposes, investors, industries, government and academics are looking to identify the best device in terms of of cost of energy and performance. However, it is difficult to compare the cost of energy of new devices directly because of uncertainties…
- Gleizon et al.
Ocean wave energy has become the focus of governments and energy companies over the past decade. In spite of its unpredictability, this untapped source of energy appears to be a sustainable alternative to traditional sources of energy such as thermic and nuclear energies, or hydropower, all of which pose significant environmental and geopolitical problems. Open to the Atlantic Ocean at…
- Özkan-Haller et al.
Knowledge of the effects of wave energy converters (WECs) on the near and far wave fields is critical to the efficient and low-risk design of waveforms. Several computational wave models enable the evaluation of WEC array effects, but model validation has been limited. In this chapter, we validate two popular models with very different formulations: the phase-resolving model WAMIT and the…
- Polagye
The acoustic characteristics of marine energy converters are of interest to those attempting to quantify their environmental effects at larger scale. Such efforts are complicated by the time variation in marine energy converter sound caused by changes in the environmental forcing and converter operation, the difficulty of identifying marine energy converter sound amidst background noise from a…
- Etter
This chapter describes the utilization of underwater acoustic models for the evaluation of marine-system noise impacts associated with the installation and operation of marine-hydrokinetic energy (MHK) devices, particularly in coastal oceans. Coastal environments are generally characterized by high spatial and temporal variabilities, which make them very complex acoustic environments.…
- Lowcher et al.
There has been global interest in renewable energy for meeting energy demands, and as these demands increase, it will become of greater importance to utilize low-carbon energy sources to mitigate anthropogenic impact on the environment. Onshore hydropower is responsible for half of the electricity generated by a renewable source in the USA. In the ocean, marine hydrokinetic (MHK) energy in…
- Haas et al.
Ocean basin scale wind-driven currents provide a possible source of renewable energy using ocean turbine technology to convert kinetic energy of the flow to electricity. The Gulf Stream System in the North Atlantic Ocean is part of one of the largest subtropical gyres in the world. Within these gyres, the western intensification due to the Coriolis force produces some of the largest and most…
- Meyer et al.
The potential for energy extraction from the fast-flowing Agulhas Current along South Africa’s East Coast is examined. Potentially suitable regions are evaluated using state-of-the-art satellite remote-sensing, predictive modelling, and in situ observation technologies. A mid-shelf location (91 m depth) and an offshore location (255 m depth) at approximately 32.51°S and 28.83°E are evaluated…
- Tseng et al.
In this chapter, a general overview and characterization of ocean current resources for potential power generation in the global oceans are presented. They are based on analysis of two relatively long data sets of surface drifter-observed mixed-layer current and the satellite altimeter-derived surface geostrophic current. Spatial and temporal variations of the four most prominent western…
- Hashemi and Lewis
Some regions of the world concurrently experience a high wave and a high tidal energy resource. These regions include the seas of the northwest European continental shelf, the Gulf of Alaska, New Zealand, northwest Australia, and the Atlantic seaboard of Argentina. Due to the interaction of waves and tides, special consideration needs to be given to resource characterization of marine…
- Vennell
The components of the energy lost by currents flowing along tidal channels with large turbine arrays provide insights about developing farms to generate electricity from tidal streams. The performance and economics of a farm are profoundly affected by where a farm lies on the curve of the total power lost by the flow in relation to its peak at a total drag coefficient of2. Farms in shallow…
- Alvarez et al.
Tidal energy has significant potential yet to be developed. Sizeable investments, operating costs and environmental impact are barriers that have to date restricted its development. However, microturbine arrays which are viable in coastal locations can help minimize the initial investment as well as operating costs and environmental impact. This paper puts forward a complete smart grid design…
- Mousavi
This paper focuses on dynamic modeling, simulation, control and energy management in an isolated integrated power generation system consisting of a 315 kW offshore wind turbine, a 175 kW tidal turbine, a 290 kW microturbine, and a 3.27 kAh lead acid battery storage. A first, due to efficient and economical utilization of the renewable energy resources, optimal sizing of the hybrid system is…
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