Taiwan coastline is 1,985,315 meters. It is estimated that at least 1%
of them can be used for sea wave power generation, which means 19,853 meters. If 80 meters sea shore an installed capacity of 6MW electric power, then total sea wave install capacity will be 1,489MW, accounting for 4%
of the total electric power installed capacity in Taiwan (Total installed capacity in the year 2016 was 42,132.5MW). This amount of sea wave power will help Taiwan to achieve a target of 20% of renewable energy in the future.
In terms of cost of construction, total cost is estimated to be US$4,963 million dollars�1,4896 ×𝑈𝑈𝑈𝑈$ 20 𝑚𝑚𝑚𝑚𝑚𝑚𝑚𝑚𝑚𝑚𝑚𝑚𝑚𝑚𝑚𝑚� , which is much cheaper than that of constructing the same size of nuclear station.
A levelized-bus-bar cost of production from sea wave power is estimated to be around NT$2.55 per KWh, following are the calculations:
Total output =1,489,000,000 W×8,760 h×0.5 = 6521.82 GW;
Total cost = (1,489MW ÷ 6MW)×20𝑚𝑚𝑚𝑚𝑚𝑚𝑚𝑚𝑚𝑚𝑚𝑚𝑚𝑚 = 𝑈𝑈𝑈𝑈$4,963𝑚𝑚𝑚𝑚𝑚𝑚𝑚𝑚𝑚𝑚𝑚𝑚𝑚𝑚 𝑑𝑑𝑚𝑚𝑚𝑚𝑚𝑚𝑑𝑑𝑑𝑑𝑚𝑚 Fixed expense factor = 10.8% (7+3.3+0.3+0.2);
Annual fixed change = US$4,963×0.108 = US$ 536 million dollars Unit per cost = 𝑈𝑈𝑈𝑈$ 536,000,000×31
6,521,820,000𝐾𝐾𝐾𝐾ℎ = 𝑁𝑁𝑁𝑁$ 2.55/𝐾𝐾𝐾𝐾ℎ
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Which is more expensive than current thermal power generation of NT$1.76 dollars. However, sea wave power is renewable energy and it also has the advantage of greenhouse gas emission free.
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Chapter Five: Conclusion
According to the data from Taiwan Power Company, the installed capacity of renewable energy in Taiwan has increased to 4,321.4MWin 2016. However, most of them were generated by the solar power plant and wind power in the land.This study is to discuss the feasibility of using sea wave power generation in Taiwan, and the conclusion is described in this chapter.
5.1 Major Findings
According to the literature review and method analysis in previous chapters, we found that sea wave power generation is feasible in Taiwan as follows:
1. EZE Energy Company has built up a mature technology function, and its
“capacity factor” of generation is for 24-hour working. Compare to nuclear power, it is zero pollution and the process of operating sea wave power generation is without any materials or fuel consuming.
2. The generator needs only 0.5 meters wave height running and the buoy contacting sea water is with high-strength and anti-corrosion materials. The generator machine doesn’t be set in sea water. Compared to traditional sea power generation, the platform is above the water, which leads to easy operation and maintenance.
Moreover, the design of the generator is also considered to face bad weather situation, such as typhoon.
3. The time of setting of a sea wave power plant is within one year. A Nuclear Power Plant needs at least six years to build up. The cost of the construction is US$ 20 million for a 6MW generator and it is economically acceptable. If we expanded the installed capacity of sea wave power generator equal to Nuclear Plant Ⅳ, the construction cost is US$ 8,833 million, the construction cost is lower than Nuclear Plant Ⅳ, with a total cost of US$ 8,900 million.
4. Compare to the cost per kWh, it is NT$ 2.55 per kWh, which is not too much
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higher than the wind power NT$ 2.25 per kWh.
5. In addition to zero fuel cost and pollution, sea wave power also has advantages of free wasted fuel in decommissioning.
5.2 Suggestion
Base on the major findings, there are some research suggestions for the government.
1. The right of use of the coastline in Taiwan is entirely controlled by the government. If we want to successfully run the sea wave power generation, we need to obtain the permission and support from the government. Only the government pays attentions to the sea wave power of renewable energy, sea wave power is able to be developed in Taiwan.
2. The divergence between DPP and KTM administrations on nuclear policy causes a waste of about NT $400 billion in construction cost in the past. And the NT
$400 billion will be paid by all taxpayers in Taiwan. If the government paid attention to the development of marine energy and developed it early, there would not be numerous wastes like NT $400 billion and social cost, which led to needless wastes and expenses afforded by people in Taiwan.
3. Due to the strong development of alternative energy of the wind and solar power by the Taiwan Power Company, the land used in solar and wind power is almost saturated, which means there is no room in developing solar power plant and wind power in the land. Taiwan should seriously consider developing the sea wave power.
4. According to the research result, Taiwan has expansion capacity for the sea wave power.
5. Sea wave power is considered a competitive energy, it has a chance to help Taiwan archive the goal of 20% electricity supply from renewable energy by the year 2025.
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5.3 Research Restriction
In the marine energy, it includes ocean thermal energy, tidal energy, marine current energy, etc. This study just only discusses the sea wave power generation in Taiwan due to available data for sea wave power technology.
5.4 Future Studies
Finally, to conclude the major findings, suggestion, and restriction, there are some future studies for the government and industries.
1. The more comparative analysis is needed in the section of marine energy to support the feasibility of sea wave power.
2. To estimate the optimal coastline in Taiwan in addition to develop the appropriate sites for sea wave power generation.
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