Dynamic tidal power: Difference between revisions
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<onlyinclude>'''Dynamic tidal power''' is a [[technology]] that uses the difference between the [[potential energy]] and [[kinetic energy]] of [[tidal power|tides]].</onlyinclude> Long dams are built from coasts straight out into the sea or | <onlyinclude>'''Dynamic tidal power''' is a [[technology]] that uses the difference between the [[potential energy]] and [[kinetic energy]] of [[tidal power|tides]].</onlyinclude> Long dams are built from coasts straight out into the sea or ocean—meaning that the tides in the areas where these systems might be implemented usually ''flow parallel'' to their respective coasts.<ref name=Ref1>"Dynamic Tidal Power in China" internet: https://www.youtube.com/watch?v=W7PTxoW66dM [June 6, 2014]</ref> During the movement of tides, water on one side of the dam is at a higher level than the other side. As this water flows through the dam it drives a series of turbines installed within the dam and generates [[electricity]]. Furthermore, these dams are designed with bi-directional turbines, which flip 180<sup>o</sup> after each tide in order to generate power both when the tide comes in and goes out. The added output from having bi-directional turbines is a huge advantage for these types of systems since they allow the power output to basically double. | ||
[[File:Dynamic tidal.png|300px|framed|right|Figure 1 A representation of how Dynamic tidal power is used<ref name=ref88>"China, Netherlands sign joint agreement for 15-GW Hydrokinetic project" internet: http://charlesandnuttall.blogspot.ca/2012/10/china-netherlands-sign-joint-agreement.html</ref>]] | [[File:Dynamic tidal.png|300px|framed|right|Figure 1. A representation of how Dynamic tidal power is used.<ref name=ref88>"China, Netherlands sign joint agreement for 15-GW Hydrokinetic project" internet: http://charlesandnuttall.blogspot.ca/2012/10/china-netherlands-sign-joint-agreement.html</ref>]] | ||
===Important note=== | ===Important note=== | ||
| Line 10: | Line 10: | ||
==A closer look== | ==A closer look== | ||
A dynamic tidal power dam can | A dynamic tidal power dam can be 30 to 60 [[km]] long and is typically built perpendicular to the coast, running relatively straight out into the ocean. This design does not enclose any area, thus allows more freedom for aquatic life without risk of being trapped.<ref name =Ref3>"Dynamic Tidal Power (DTP) – A new approach to exploit tides" paper: 2nd International Conference on Ocean Energy (ICOE 2008), 15th – 17th October 2008, Brest [June 06, 2014]</ref> These dams generate a water level difference from one side of the dam to the other—known as 'head'. The head difference (difference in water level between both sides) is predicted to be able to reach up to a few meters. The higher the head difference will result in much higher power production. | ||
==Power Production== | ==Power Production== | ||
In | In 2015, Canada generated 670 [[kilowatt-hour|terawatt-hours]] of electricity. This means that a single dynamic tidal power dam, with an 8 [[watt|GW]] installed [[capacity]] (this is the theoretical maximum output of a power plant) and a [[capacity factor]] of 30% (this is the ratio of actual power output to theoretical power output) could generate almost 4% of Canada's total power output or 21 terawatt-hours annually.<ref name=Ref6/><ref name=Ref10/> | ||
==Positives of dynamic tidal power== | ==Positives of dynamic tidal power== | ||
| Line 20: | Line 20: | ||
===Multiple Functions=== | ===Multiple Functions=== | ||
These types of dams, by necessity, tend to be very long (30 to 60 km) which is significantly longer (and more expensive to build) than current coastal structures. However, a long dam can function with multiple purposes | These types of dams, by necessity, tend to be very long (30 to 60 km) which is significantly longer (and more expensive to build) than current coastal structures. However, a long dam can function with multiple purposes such as [[land reclamation]], connections between islands, mainland coastal protection, and deep sea and [[liquefied natural gas]] ports. The initial investment costs could easily be shared between these different industries, thus helping to lower the cost per [[kWh]] and create higher return investments.<ref name=Ref10>"Accelerating Marine Energy" internet:http://www.carbontrust.com/media/5675/ctc797.pdf [June 08, 2014]</ref> | ||
===Stable, sustainable, and available=== | ===Stable, sustainable, and available=== | ||
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The moon (and subsequent [[tidal force]]) isn't going anywhere anytime soon which means that this type of tidal power will be around indefinitely. Furthermore, the tidal cycle is predictable and repetitive which allows us to know exactly when and how much power is obtainable.<ref name =Ref5>"Tidal Energy Generation" internet: http://fundyforce.ca/renewable-and-predictable/tidal-energy-generation [June 05, 2014]</ref> | The moon (and subsequent [[tidal force]]) isn't going anywhere anytime soon which means that this type of tidal power will be around indefinitely. Furthermore, the tidal cycle is predictable and repetitive which allows us to know exactly when and how much power is obtainable.<ref name =Ref5>"Tidal Energy Generation" internet: http://fundyforce.ca/renewable-and-predictable/tidal-energy-generation [June 05, 2014]</ref> | ||
Interestingly enough, since these dams are built perpendicular to the shore and the tide flows parallel, dynamic tidal power doesn't require huge tidal ranges. | Interestingly enough, since these dams are built perpendicular to the shore and the tide flows parallel, dynamic tidal power doesn't require huge tidal ranges. Therefore, these could be implemented in locations throughout the world, which is advantageous over other forms of tidal power (ex. [[tidal stream generator]]s and [[tidal barrage]]s) since they tend to require more intense tidal fluctuations in order to be economically viable. | ||
==Negatives of dynamic tidal power== | ==Negatives of dynamic tidal power== | ||
| Line 32: | Line 32: | ||
===Lack of proof=== | ===Lack of proof=== | ||
Unfortunately, due to the nature of the tides and the design of these dams, a full project must be built in order to guarantee predicted success. Building a miniature dam would be ineffective since these dams require a predicted minimum length of 30 km to ensure economic viability.<ref name =Ref8>"Industry Reports" internet: http://www.carbontrust.com/media/168547/tina-marine-energy-summary-report.pdf</ref> Such a dam would require an enormous capital investment and if the design failed a lot of money would be lost. Furthermore, construction of a structure that extends 30 km or further into the ocean has never been | Unfortunately, due to the nature of the tides and the design of these dams, a full project must be built in order to guarantee predicted success. Building a miniature dam would be ineffective since these dams require a predicted minimum length of 30 km to ensure economic viability.<ref name =Ref8>"Industry Reports" internet: http://www.carbontrust.com/media/168547/tina-marine-energy-summary-report.pdf</ref> Such a dam would require an enormous capital investment and if the design failed a lot of money would be lost. Furthermore, construction of a structure that extends 30 km or further into the ocean has never been attempted—the technology is available but the difficulty is extremely high.<ref name =Ref4> "How Does Tidal Power Work?" internet:http://energyinformative.org/how-does-tidal-power-work [June 09, 2014]</ref> | ||
===Environmental Impact=== | ===Environmental Impact=== | ||
The [[environmental impact]] of | The [[environmental impact]] of such a system could be significant. Unfortunately, in areas where any tidal power stations might be built happen to be some of the most densely populated ecosystems in the ocean. Changes in water levels might harm plant and animal life and alter the sea water composition. Also, turbines in dynamic tidal power stations move quickly, and if protection is not built in, marine animals can be caught in the blades. If aquatic life drops in the area, birds typically found there might migrate to different places. An entire major ecosystem could be significantly altered. Further research is needed in order to determine just how large of an impact such stations might have.<ref name=Ref6>"Industry Vision Paper" internet: http://www.oceanenergy-europe.eu/images/Publications/European_Ocean_Energy-Industry_Vision_Paper_2013.pdf [June 09, 2014]</ref> | ||
===High costs=== | ===High costs=== | ||
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It is difficult to determine the cost per [[MW]] for these types of power stations since none have been built yet. However, the costs are sure to be much higher than any other field of energy generation. | It is difficult to determine the cost per [[MW]] for these types of power stations since none have been built yet. However, the costs are sure to be much higher than any other field of energy generation. | ||
While the costs are high and the results as yet unknown, this technology may still have a place in the future [[electrical grid]]. As technology advances (which it | While the costs are high and the results as yet unknown, this technology may still have a place in the future [[electrical grid]]. As technology advances (which it will) and as [[climate change]] becomes more prevalent (which is virtually certain) there will be additional pressure to look for [[power]] with lower [[greenhouse gas]] emissions. Thus, the more that is known about alternative energy resources, the lower their costs. With these lower costs, transitions in power generation will be smoother. | ||
== | ==For Further Reading== | ||
*[[Tidal power]] | |||
*[[Tidal dam]] | |||
*[[Tidal force]] | |||
* | *[[Tidal stream generator]] | ||
* | *[[Tidal barrage]] | ||
* | *Or explore a [[Special:Random|random page]] | ||
* | |||
* | |||
==References== | ==References== | ||
{{reflist}} | {{reflist}} | ||
[[Category:Uploaded]] | [[Category:Uploaded]] | ||
Latest revision as of 18:14, 4 January 2019
Dynamic tidal power is a technology that uses the difference between the potential energy and kinetic energy of tides. Long dams are built from coasts straight out into the sea or ocean—meaning that the tides in the areas where these systems might be implemented usually flow parallel to their respective coasts.[1] During the movement of tides, water on one side of the dam is at a higher level than the other side. As this water flows through the dam it drives a series of turbines installed within the dam and generates electricity. Furthermore, these dams are designed with bi-directional turbines, which flip 180o after each tide in order to generate power both when the tide comes in and goes out. The added output from having bi-directional turbines is a huge advantage for these types of systems since they allow the power output to basically double.
Important note
Dynamic tidal power generation remains in the developmental stages meaning that any data is based on models and known tidal behaviour. With that being said, these models tend to be highly advanced and have high confidence in these theoretical predictions.[3]
A closer look
A dynamic tidal power dam can be 30 to 60 km long and is typically built perpendicular to the coast, running relatively straight out into the ocean. This design does not enclose any area, thus allows more freedom for aquatic life without risk of being trapped.[4] These dams generate a water level difference from one side of the dam to the other—known as 'head'. The head difference (difference in water level between both sides) is predicted to be able to reach up to a few meters. The higher the head difference will result in much higher power production.
Power Production
In 2015, Canada generated 670 terawatt-hours of electricity. This means that a single dynamic tidal power dam, with an 8 GW installed capacity (this is the theoretical maximum output of a power plant) and a capacity factor of 30% (this is the ratio of actual power output to theoretical power output) could generate almost 4% of Canada's total power output or 21 terawatt-hours annually.[5][6]
Positives of dynamic tidal power
Multiple Functions
These types of dams, by necessity, tend to be very long (30 to 60 km) which is significantly longer (and more expensive to build) than current coastal structures. However, a long dam can function with multiple purposes such as land reclamation, connections between islands, mainland coastal protection, and deep sea and liquefied natural gas ports. The initial investment costs could easily be shared between these different industries, thus helping to lower the cost per kWh and create higher return investments.[6]
Stable, sustainable, and available
The moon (and subsequent tidal force) isn't going anywhere anytime soon which means that this type of tidal power will be around indefinitely. Furthermore, the tidal cycle is predictable and repetitive which allows us to know exactly when and how much power is obtainable.[7]
Interestingly enough, since these dams are built perpendicular to the shore and the tide flows parallel, dynamic tidal power doesn't require huge tidal ranges. Therefore, these could be implemented in locations throughout the world, which is advantageous over other forms of tidal power (ex. tidal stream generators and tidal barrages) since they tend to require more intense tidal fluctuations in order to be economically viable.
Negatives of dynamic tidal power
Lack of proof
Unfortunately, due to the nature of the tides and the design of these dams, a full project must be built in order to guarantee predicted success. Building a miniature dam would be ineffective since these dams require a predicted minimum length of 30 km to ensure economic viability.[8] Such a dam would require an enormous capital investment and if the design failed a lot of money would be lost. Furthermore, construction of a structure that extends 30 km or further into the ocean has never been attempted—the technology is available but the difficulty is extremely high.[9]
Environmental Impact
The environmental impact of such a system could be significant. Unfortunately, in areas where any tidal power stations might be built happen to be some of the most densely populated ecosystems in the ocean. Changes in water levels might harm plant and animal life and alter the sea water composition. Also, turbines in dynamic tidal power stations move quickly, and if protection is not built in, marine animals can be caught in the blades. If aquatic life drops in the area, birds typically found there might migrate to different places. An entire major ecosystem could be significantly altered. Further research is needed in order to determine just how large of an impact such stations might have.[5]
High costs
It is difficult to determine the cost per MW for these types of power stations since none have been built yet. However, the costs are sure to be much higher than any other field of energy generation.
While the costs are high and the results as yet unknown, this technology may still have a place in the future electrical grid. As technology advances (which it will) and as climate change becomes more prevalent (which is virtually certain) there will be additional pressure to look for power with lower greenhouse gas emissions. Thus, the more that is known about alternative energy resources, the lower their costs. With these lower costs, transitions in power generation will be smoother.
For Further Reading
References
- ↑ "Dynamic Tidal Power in China" internet: https://www.youtube.com/watch?v=W7PTxoW66dM [June 6, 2014]
- ↑ "China, Netherlands sign joint agreement for 15-GW Hydrokinetic project" internet: http://charlesandnuttall.blogspot.ca/2012/10/china-netherlands-sign-joint-agreement.html
- ↑ "Dynamic Tidal Power" internet: http://www.se4all.org/commitment/dynamic-tidal-power [June 6, 2014]
- ↑ "Dynamic Tidal Power (DTP) – A new approach to exploit tides" paper: 2nd International Conference on Ocean Energy (ICOE 2008), 15th – 17th October 2008, Brest [June 06, 2014]
- ↑ 5.0 5.1 "Industry Vision Paper" internet: http://www.oceanenergy-europe.eu/images/Publications/European_Ocean_Energy-Industry_Vision_Paper_2013.pdf [June 09, 2014]
- ↑ 6.0 6.1 "Accelerating Marine Energy" internet:http://www.carbontrust.com/media/5675/ctc797.pdf [June 08, 2014]
- ↑ "Tidal Energy Generation" internet: http://fundyforce.ca/renewable-and-predictable/tidal-energy-generation [June 05, 2014]
- ↑ "Industry Reports" internet: http://www.carbontrust.com/media/168547/tina-marine-energy-summary-report.pdf
- ↑ "How Does Tidal Power Work?" internet:http://energyinformative.org/how-does-tidal-power-work [June 09, 2014]