GGHS 2019 Winter - Team 7

Write introduction about topic here.

Team

No.	Team Topic	Teacher	Role	Name (Korean)	No. of Students
7	Renewable Energy and Environmental Protection (신재생에네지와 생물보존)	Marianna PEROVA	Leader	안서연	8
			Vice-Leader	제서윤
				박수빈
				이호연
				오서연
				신혜원
				한가현
				박유진

Topic: Renewable Energy and Environmental Protection.

Body

Field of Renewable Energy

Renewable Energy

Sort of Renewable Energy

Photovoltaic Energy Generation
Photovoltaic energy refers to light energy coming from the sun, and refers to energy using solar cells that convert solar light energy into electrical energy using photoelectric effect. It is a more advanced way in solar power technology that uses solar heat directly for heating. Solar power generation is a way of generating electricity by converting sunlight into direct current. Solar power uses solar panels with several solar cells attached. As demand for renewable energy increases, production of solar cells and photovoltaic arrays is increasing.

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Tidal Barrage Generation
The principle of tidal barrage generation is generally to turn the generator by closing the floodgate and then opening the door, using the force of water spilling. The fall is usually less than 10m, smaller than the fall from the hydraulic power. There are only a limited number of countries that have tidal resources because the tidal difference is only available in large areas with large capacity reserves. In particular, Korea's west coast has various sizes of bight, and due to its large geographical features, it is considered a good place to develop tidal energy. Tidal power is a clean energy source with low power costs and no pollutants. In addition, they are in the spotlight because their energy sources are unlimited and infinite. Its major advantage is that it can produce electricity twice a day without being affected by weather conditions. It is the only renewable energy source that can be predicted over the long term. That's because tide phenomenon is a regular and accurate long-term forecast because it is caused by regular celestial movements.

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Biomass Energy Generation
Bioenergy is energy that uses biomass. Biomass is the most used energy source in the world until the 19th century, when trees were the main energy source. Currently, about 10 percent of the world's primary energy consumption comes from biomass. When biomass is heated with a small amount of oxygen, a medium gas is produced. The gas can be purified and used to produce heat and electricity through a cogeneration generator. If biomass is heated to a high temperature of 500°C with the air completely cut off, heat decomposition occurs. Heat decomposition produces bio oil, gas, and charcoal, which is used to produce electricity and heat, and charcoal is used to fuel

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Wind Energy Generation
Wind energy is the energy used to convert the kinetic energy of a natural wind into rotating energy and eventually produce electricity. Wind power is a form of solar energy that can produce electricity through wind turbines. Wind power is unlimited and clean energy that is pollution-free. The amount of wind energy is determined by the length of the rotor blades and the speed of the wind, and the larger the diameter of the wing, the higher the wind velocity, the greater the electrical production is possible. The cost of installation and maintenance is lower than other renewable energy sources, and facilities such as windmills can also be used for tourism. However, if the wind is thin, the development is difficult and a device is needed to store energy. Also, the noise from wind turbines can have a bad effect on the living things around them. To compensate for these shortcomings, large ocean wind farms have been increasing the efficiency of wind power generation.

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Pros/Cons in the Field of Renewable Energy

While fossil fuels such as oil, natural gas, and coal are being depleted, some analyze that the use has already exceeded the limit, renewable energy does not run out easily because it uses nature to make energy. Also, renewable energy has very little greenhouse gas emissions compared to fossil fuels. The new and renewable energy industry is so fast growing that it is a new growth engine that it helps to stand up for energy and create jobs in Korea.

On the other hand, there are many disadvantages. The cost of producing electricity using solar power is 12 times more expensive than the cost of producing electricity from nuclear power, and the initial investment cost is high. Also, because the natural environment must be compatible, electricity cannot be produced at a time when electricity is needed, and power generation is not consistent. Finally, although very little greenhouse gas is produced, it could lead to more greenhouse gas emissions if solar power or biofuel crops are cultivated by damaging forests.

Renewable Energy Used in Ganghwa

Tidal Barrage Generation in Ganghwa

The oceans, which account for 71 percent of the Earth's surface area, are constantly receiving energy from the sun and the moon in the form of heat, kinetic and potential energy, but most are not directly utilized as energy sources. Marine energy is drawing attention due to the need to develop new and renewable energy, and tidal barrage is one of the most representative examples of marine energy. Tidal barrage is a method that produces electricity by using the falling tide of the ebb and flow twice a day. To do this, large estuaries and tidal reservoirs must be formed in the estuary or the bay where strong tides occur. Among them, Ganghwa, the largest of its kind, is regarded as a strong rock and a well-developed Liaseian beach. Contrary to such expectations, however, the current tidal energy is not used in Ganghwa. The government has been excluded from the national energy development project due to concerns from various civic organization. "Lack of facts on data from environmental impact assessment, lack of reliability of numerical model data, lack of protection measures against milk shrimp farms, and suspicion of reducing damage to fish farms by stonecutri." [1] Within Ganghwa, "the Incheon Sunlight Development Cooperative" [2] was formed to create an alternative solar power plant in order to create new renewable energy instead of dismissing the plan of energy.

Field of Environmental Protection

Creatures inhabit in the Ganghwa mud flat

What is mudflats? : It is a coastal land that appears twice a day between land and sea. The mudflats are usually formed by a long accumulation of sediment on the coast, where the slope of the coast is gentle and the difference between the tide and the ebb is huge.

Ganghwa mudflats : The Ganghwa mudflats spread over Southern Ganghwa, Seongmodo Island, Boreumdo. The Ganghwa mudflats are one of the largest mudflats in Korea, one of the world's five largest mudflats. The Ganghwa mudflats are in good condition and their economic value is infinite. In 2000, the government designated the surrounding mudflats of Ganghwado Island, Seokmodo Island, and Boreumdo as Natural Monument No.419.

Creatures that Inhabit the Ganghwa mudflats : There are many creatures like Manila clam, Sand crab, Globular ghost crab, Pea ghost crab, swimming crab, Surf clam, Jack Knife clam, cockle, barnacle, goby, lugworm.

Manila clam(바지락) : The Manila clams are small sea shells belonging to the lily family. The oval shell is about 3cm high and 4cm wide, but the large body can reach 6cm wide. They can range from white to black, mountain-shaped radiation patterns and yellow-brown waves. The name “Bajirak” is said to have been given the "Bajirack Bajirack" of the clapping sound when scraping on the mudflats.

Sand crab(농게) : They lives a lot in Korea in the Yellow Sea mudflats, and the number of habitats is declining due to reclamation projects. Both claws of females are small and symmetrical, and the claws are long and spoon-shaped, making them suitable for scraping food on mudflats. Male's claw is the same as a female, while the other is larger with a claw length of 50mm. They burrow into mud mudflats, sometimes as deep as about 80 centimeters.

Globular ghost crab(엽낭게) : They live in groups in the estuary of the whole country except East Sea Coast or the sandy mud floor in the bay.

Surf clam(동죽) : The shell is round triangle shape, gray color, and white inside. However, the color varies slightly depending on the mudflats that live in the area. They have a round black line, which represents the age of the shell. They scattering at a water temperature of 22°C in May and October. There is a habit of spouting water from time to time like a fountain. Their prey is plant plankton and small floating organic fragments.

Barnacle(따개비) : There is no stomach of Barnacle. Their heads have neither eyes nor touch. They eat plankton in the water from the upper gills. He is a self-proclaimed creature, but he also mixes with other objects.

Map(s)

Network Graph(s)

• SAMPLE: VH2018_부석사reference.lst
• YOUR TEAM GRAPH: GGHS2019W_Team7.lst

References

• 인천광역시 문화유산 - 영문 해설문 포함 (한국학중앙연구원)
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