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Tidal Energy
Published in Sergio C. Capareda, Introduction to Renewable Energy Conversions, 2019
Dynamic tidal power (DTP) is yet untried but a promising technology that would use both the kinetic energy and the potential energy of water bodies. This concept proposes a very long dam of 30 to 50 km [18.65 to 31 mi] long built along the coastline and straight out to the sea. Tidal phase differences are introduced across the dam, leading to various water head differences in shallow coastal areas. These coastal areas must have strong oscillating tidal currents. Potential applications include those near the coasts of China, the United Kingdom, and South Korea. The dams are usually constructed perpendicular to the coastline, and another dam parallel to the coastline acts as a barrier between the high-tide side and the low-tide side. This will form a structure shaped like the letter T. This concept was invented and patented by Kees Huldbergen and Rob Steijn, two Dutch engineers. A short video explaining the concept was released and completed in October 2013. It was estimated that some of the largest dams could accommodate 15,000 MW [0.448 Quad/yr] of installed capacity. A DTP dam with 8 GW installed capacity and a capacity factor of about 30% could generate about 21 TWh of energy per year. For example, an average European person consumes about 6,800 kWh of energy per year, and one DTP of this size could supply energy to about 3.09 million Europeans (Steijn, 2015).
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.
Integrative technology hubs for urban food-energy-water nexuses and cost-benefit-risk tradeoffs (I): Global trend and technology metrics
Published in Critical Reviews in Environmental Science and Technology, 2021
Ni-Bin Chang, Uzzal Hossain, Andrea Valencia, Jiangxiao Qiu, Qipeng P. Zheng, Lixing Gu, Mengnan Chen, Jia-Wei Lu, Ana Pires, Chelsea Kaandorp, Edo Abraham, Marie-Claire ten Veldhuis, Nick van de Giesen, Bruno Molle, Severine Tomas, Nassim Ait-Mouheb, Deborah Dotta, Rémi Declercq, Martin Perrin, Léon Conradi, Geoffrey Molle
As a potential renewable energy, run-of-the-river hydroelectricity is a typical type of hydropower that harvests the energy from flowing water to generate electricity via an impoundment facility. However, tidal power can also convert kinetic hydro-energy into power. With the rapid advancement of this technology, tidal energy potential has been estimated to be about 32 PWh/year globally (Rusu & Venugopal, 2019). Due to its huge potential, the European Union has planned to install capacities of 3.6 GW and 188 GW by 2020 and 2050, respectively (Segura et al., 2017). Since tidal energy technologies are still in an initial stage of development, environmental impact, cost-benefit, technological viability, and potential risks are yet to be thoroughly studied, although some successful cases have been reported (Segura et al., 2017). Several technology variations have been reported to provide cost-effective energy generation (shown in Supplementary Information Table S4). Some of these technologies may be considered centralized technology. Descriptions of hydro-power technologies such as tidal barrage (T2-TB), dynamic tidal power (T3-DTP), stream generator (T1-SG) and wave energy to power (T4-WtP) are given in Supplementary Information (S1.1), and the associated costs, benefits, and risks are shown in Table S4 (Supplementary Information).