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Seabirds and Marine Renewable Energy Sources
Published in Jaime A. Ramos, Leonel Pereira, Seabird Biodiversity and Human Activities, 2022
Tidal range energy can be harvested using a dam or barrage along an estuary or river, or via construction of a tidal lagoon (Neill et al. 2018, Chowdhury et al. 2020). The first tidal power plant, the La Rance Tidal Power Station (240 MW capacity), was commissioned in the Rance river mouth, France, in 1966 (Retiere 1994). Other operating tidal barrages include the Sihwa Lake Tidal Power Station in South Korea (254 MW capacity) and smaller plants, with less than 20 MW of capacity, in Canada, China, Russia and South Korea (Neill et al. 2018). Such developments are likely to have high construction costs and could have considerable environmental impacts on the dynamics of an estuary and associated habitat (Neill et al. 2018). Energy can also be harvested from strong tidal currents using tidal turbines of varying designs (Figs. B3.1 and B3.2). Such devices may vary in capacity from a few kW to multi-megawatt (MW), can be deployed in arrays, and are beginning to move toward commercial deployment (Fox et al. 2017).
Smart Energy Resources: Supply and Demand
Published in Stuart Borlase, Smart Grids, 2018
Stuart Borlase, Sahand Behboodi, Thomas H. Bradley, Miguel Brandao, David Chassin, Johan Enslin, Christopher McCarthy, Stuart Borlase, Thomas Bradley, David P. Chassin, Johan Enslin, Gale Horst, Régis Hourdouillie, Salman Mohagheghi, Casey Quinn, Julio Romero Aguero, Aleksandar Vukojevic, Bartosz Wojszczyk, Eric Woychik, Alex Zheng, Daniel Zimmerle
Tidal power converts the energy of tides into electricity. The most common tidal power technologies are tidal stream generators and tidal barrages. Tidal stream generators rotate underwater and produce electricity using the kinetic energy of tidal streams. Tidal barrage uses a dam located across a tidal estuary to produce electricity using the potential energy of water. Water flows into the barrage during high tide and then it is released during low tide while moving a set of turbines. New technologies, such as dynamic tidal power, are being discussed and evaluated; this technology is intended to take advantage of a combination of the kinetic and potential energy of tides.
Smart Grid Technologies
Published in Stuart Borlase, Smart Grids, 2017
Tidal power converts the energy of tides into electricity. The most common tidal power technologies are tidal stream generators and tidal barrages. Tidal stream generators rotate underwater and produce electricity using the kinetic energy of tidal streams. Tidal barrage uses a dam located across a tidal estuary to produce electricity using the potential energy of water. Water flows into the barrage during high tide and then it is released during low tide while moving a set of turbines. New technologies such as dynamic tidal power are being discussed and evaluated; this technology is intended to take advantage of a combination of the kinetic and potential energy of tides.
The ocean as a source of renewable energy in sub-Saharan Africa: sources, potential, sustainability and challenges
Published in International Journal of Sustainable Energy, 2023
Alberto Filimão Sitoe, António Mubango Hoguane, Soufiane Haddout
Tidal energy is produced as a result of the gravitational fields of both the sun and the moon, which together with the earth’s rotation around its axis lead to both high and low tides. Energy generated can be harnessed through two basic methods: (1) tidal barrages which make use of the tidal amplitude, where during flood tide the basin behind the barrage is filled and during the ebb tide the water is released through turbines that create electrical power though the use of generators, and (2) tidal stream generators which make direct use of the kinetic energy of moving water to power turbines, working in a similar way to wind turbines (Bryden 2004; Fourie and Johnson 2017). Tides present advantages in comparison to waves, wind and solar energy because they are predictable both in terms of time and magnitude, and hence are a very reliable source of energy (Neill and Hashemi 2018). Tidal energy is often harvested for electricity production (Chowdhury et al. 2021; Etemadi et al. 2011) and new applications include desalination. For desalination, the pressure increase due to waves, which are then channelled ashore to drive a reverse osmosis desalination system (Babu, KarthikBalaji, and Nishal 2017a; Babu, Selvamuthukumaran, and Arunkumar 2017b; Contestabile and Vicinanza 2018; Franzitta et al. 2016).
Review and assessment of offshore renewable energy resources in morocco’ coastline
Published in Cogent Engineering, 2019
This paper presented an overview of the offshore renewable energy resources that are available in Morocco. This country shares the Atlantic Ocean with leading countries in offshore technology research such as the UK, France, Portugal and Spain. Literature review and data analysis showed that Morocco possesses important offshore resources, especially along its Atlantic coast. For instance, important offshore wind resources are concentrated between the regions of El Jadida and Agadir, where the wind speed peaks at 9_m/s. Regarding tidal stream power, significant resources exist near Tangiers with speeds up to 1.9_m/s. This speed could produce 1.58_kW/m2 of electricity. Oualidia lagoon was also studied and utilized as a scenario for the installation of a tidal barrage. If only 10% of the total surface of the lagoon is exploited by a tidal barrage, 0.5_MW of electricity could be generated. Finally, significant ocean wave energy is concentrated in the region between Essaouira and Agadir, where the wave height is up to 2.3_m.
Status of tidal energy system in India
Published in Journal of Marine Engineering & Technology, 2021
Other challenges include Irregular supply – Due to the weather condition and uncertain rise & fall in tides, it generates irregular tidal energy and compensate such type of problem to install a large number of batteries to store tidal energy.Cost – The capital, replacement and operation & maintenance cost of the overall tidal energy system is very large and this is a main drawback of tidal energy system in the Indian context.The modifying of the biological community at the sound Damages like decreased flushing, winter icing and disintegration can change the vegetation of the zone and upset the equalisation. Like other sea energies, tidal energy has a few requirements that make it just accessible in a few locales. For a tidal power plant to create power viably (about 85% effectiveness), it requires a bowl or an inlet that has a mean tidal adequate (the contrasts among spring and neap tide) of 7 metres or above. It is likewise alluring to have semi-diurnal tides where there are two high and low tides each day. A torrent over an estuary is exceptionally costly to fabricate, and influences a wide territory – the earth is changed for some miles upstream and downstream. Numerous flying creatures depend on the tide revealing the mud pads with the goal that they can nourish. There are a couple of reasonable locales for tidal floods (Sharma 2013; Cohen 2009).Tidal energy system only depends on the tidal current and due to this reason overall system only generate electricity 10 h of the day.Conventional design of tidal turbine is not feasible, it is very harmful to fish and birds.Construction cost is very highLimited feasible locationThe conventional barrage system is very expensive and they follow very slow processes.Barrages affect fish migration and other wildlife – many fish like salmon swim up to the barrages and are killed by the spinning turbines.The fish ladder system is never being 100% effective.The tidal barrages may affect the tidal level and the variation in tidal level may affect steering, leisure, cause flooding of the shoreline and affect local marine life.They must be based on sea coastlines, which imply that for networks which are far from the ocean, it’s pointless (Harries et al. 2006; Orekan et al. 2015).