Renewable Energy

Solar light

Outline

• Solar photovoltaic power generation is a technology to convert solar light into electrical energy
• Research in Korea began from as long ago as the early 1970s

Domestic Tendency

• Study is started from the early 1970s and government has developed it according to alternative energy development promoted policy around a college and research organizations
• It has been promoted with the development of solar cell manufacturing technology and system utilizing technology at the same time for saving cost and enhancing the efficiency

Solar Heat

Outline

• Technology used for air conditioning and water heating through absorption/back up/conversion of solar heat

Characteristics

Solar Heat Characteristics

Merits	Demerits
Non-polluting, unlimited clean energy source Various applications Cheap in maintain	Density is low and intermittent High installation costs Insulation good in spring/summer, not in winter

The technology development results

• Commercialization of collecting heat, and warm water and hot water supplying technology (for low temperature)
• Solar heat system field for industry (for middle & high temperature)

Bio Energy

Outline

• An energy of the organic material which is photosynthesized as solar light is used (mainly, plant body) and the energy of all creatures organisms which dynamic organic material is consumed and generated.
  ※ Bio-mass: Living organism’s energy including plants getting solar energy, plant created by photosynthesis, fungus and living organism including the animal eating this

Characteristics

Bio Energy Characteristics

Merits	Demerits
Abundant resources and a large reaching effect An eco-friendly production system Decreases of environmental contamination (greenhouse gas etc) Modes of generation energy are diversified (chemical fuel, electric power, natural chemicals)	Scattering of resources (a collection, transportation inconvenience) It has difficult of variety and development technical use along various resources It may cause environmental disruption possibility in case of excessive use Large scaled facility for investment of unit process investment

Wind Energy

Outline

• Technology supplying induced electricity to the electric system or customers

The technology development results

• Procuring the key unit technologies such as blade of middle size(750kW), generator, controlling system

Waterpower Energy

Outline

• Facilities whose capacity was 10,000 ㎾ or below were defined as minor waterpower However, waterpower including minor waterpower is defined as regenerating energy at new law (Developing and promoting energy power such as new energies and regenerative energy) before 2005
• R&D and supplying of new regenerating energy development are for minor waterpower plant

Fuel Cell

Outline

• Fuel cell converts the chemical energy by oxidation of fuel to electrical energy direct The melted carbonate fuel cell of high temperature that metal catalysis is called to the 2nd generation and solid electrolyte fuel cell generating the electricity of high efficiency is called to the fuel cell of the 3rdgeneration

A forwarding result

Gasification and liquefaction of Coal

Outline

• Gasification of Coal
  • IGCC (Integrated Gasification Combined Cycle) is a new technology that the fuel of low degree such as coal and vacuum residue is burnt imperfectly and making the fuel gasification with steam and limited oxygen, making synthesized gas that hydrogen is the main ingredient, making it through refining process, deriving gas turbine and steam turbine and then generating power
• Liquefaction
  • A technology converting solid fuel such as coal into liquefied fuel such as gasoline and light oil and it is diversified into 2 kinds of methods such as direct liquefied method in converting it into liquefied fuel with solvent under high temperature and pressure and indirect liquefied method in converting it liquefied fuel with solvent after making coal into gas

Outline

Bio Energy Characteristics

Merits	Demerits
Development of high efficient Eco-friendly technology reducing SOx and NOx to more than 95% and 90%, respectively Making various fuels of low quality(coal, intermediates, waste, etc) into the energy of high quality	As the composition of equipment and its controlling is complicated, optimization of design, high efficiency and low cost are required As necessary area is broad, the equipments are large and the cost of systems are expensive, only a few of large companies can develop them

Marine Energy

Outline

• Marine energy is a kind of technology producing electricity or heat after converting tides, wave, ocean current and gap of temperature and there are several methods such as tidal power, wave power and gradient power generation in generating electricity
  • Tidal Power Generation – Development technology producing electricity as tide is made in order to generating power, making use of ascent and descent movement of seawater
  • Wave Power Generation – Technology converting wave power into a drive power of motors such as turbines in order to generate electricity
  • Gradient Power Generation – Technology converting thermal energy into physical energy, making use of the gap of temperature between the warm water on the surface layer of seawater (25~30℃) and cold water under 500~1,000m (5~7℃)

System Framing

Energy Derived from Waste

Outline

• Technology converting the waste in order to generate fuel and energy
  • Through processing methods such as the technology producing solid fuel, technology producing flammable gas and heat collecting technology by incineration, solid, liquefied and gas fuel and waste heat are produced, and these fuels are converted in order to use them as necessary energy
• Types
  • RDF: Refuse Derived Fuel The solid fuel which was manufactured to flammable solid waste such as paper, a tree, plastics etc by the processes such as broken, detachment, desiccation, molding
  • Waste Oil and Refined Oil
    Regenerated oil, wood and plastic, refining waste lubricant through the processes such as ion refining method, pyrolysis and vacuum distillation
  • Thermally Degraded Fuel Oil of Plastic
    Polymerized wastes such as plastic, a synthetic resin, rubber and tire are pyrolyzed in order to produce clean fuel oil
  • Waste Incineration Heat
    Producing steam by collecting heat of flammable for incineration waste and generating electricity through incineration, and making use of them as the heat source of cement kiln and iron ore kiln

Geothermal Energy

Outline

• Geothermal energy is used for air conditioning technology, making use of the gap of temperature of underground water and underground heat
• Approximately 47% solar enthusiasm is stored through surface to underground and the temperature of the ground that absorbed solar heat is different according to configuration of the ground but the temperature is maintained from 10℃ to 20℃ to be used for air conditioning system using a heat pump
• Temperature under the ground (below 1~2 km) at some regions in Korea, the heat can be used for air conditioning directly

System Framing

Hydrogen Energy

Outline

• Technology converting water or organic substances into hydrogen Hydrogen can be transported into gas or liquid and easy to store hydrogen with various patterns such as high pressured gas and metal hydride

System Framing