1. Fuel Cell의 구조 및 작동원리
⑴ 연료전지발전
연료전지발전(Fuel Cell Power Generation)은 천연가스 등의 연료를 개질(改質)해서 얻어진 수소를 연료로 해서, 이 수소와 산소가 화학반응하면서 발생하는 전기에너지를 이용하는 새로운 발전 시스템이다.
연료전지는 화학에너지를 전기에너지로 변환한
Supplying energy for stable is the basis of national survival and economic growth. So this is very important.
Fuel cell is worthy of notice other alternative energy.
It generates electricity inside a cell through reactions between a fuel and an oxidant, triggered in the presence of an electrolyte.
Fuel cells are direct energy conversion into electricity. So High electric conversion eff
Li-ion is the best power storage we get
- Good : Light weight, High capacity,
Low self-discharge
- Bad : Safety, Aging, Deep discharging
1. What is Micro Fuel Cell (MFC)?
2. MFC’s Advantage
3. Kind of MFC
4. Compare MFC
5. MFC’s Now & Future
♣ Fuel Cells?
Electrochemical cell that converts a source fuel into an electrical current.
Fuel Cell has strength in..
1. Hig
Advantage
Environmental Energy source.
Reduce greenhouse gases emission
Primary role as a improvement of future environment.
Disadvantage
Economical Problem
Storage problem , Transport problem
1.United States
Perform the research and development through
DOE(Department Of Energy)
Invest a lot of fund in Stack technology.
2.Japan
Hydro Fuel cell research and develop
Chemical energy Electrical energy
Characteristic
Chemical reaction
-use oxidation
-supply fuels and oxygen from outside
-emission products to outside
Fossil fuel is limited
Fossil fuel is the main reason of global warming
The rate of energy dependence on imports is 96.8%
Increase energy import price by increasing international oil
Electrochemical devices that convert chemical energy in fuels into electrical energy directly
High efficiency & low environmental impact
Component
Five fundamental classes exist, depending on the nature of the electrolyte
PAFC
AFC
Abb. For Polyvinylidene fluoride.
high purity polymers, particularly well suited to a number of fuel cell applications, including :
proton exchange membranes
conductive bipolar flow plates
cell plate coatings
Polymer behave like molecular sieves in the solid state
Internal surface area is wide
Pore size can be controlled up to nano-scale
Organic polymer is good one to be PIMs
Op
fuel. Fuel cell is the bright prospective technique and it already spreads out in many industrial field like hydrogen fueled car. However, although our interest in fuel cell is increasing, the stage of the development is still slight. To develop fuel cell technique as the core industry, we have to construct effective infrastructures from extraction to supply. So, in this project, our team has sea
fuel through partial oxidation. The coal is fed into a high-temperature pressurized container along with steam and a limited amount of oxygen to produce a gas. The gas is known as synthesis gas or syngas and mainly consists of carbon monoxide and hydrogen. The gas is cooled and undesirable components, such as carbon dioxide and sulphur are removed. The gas can be used as a fuel or further process
Pros- Unlike regular fuel cell, MBFC can make energy in very mild condition.- MBFC can produce energy by consume variety organics.
Cons- MBFC need electrochemical mediator this mediator generally not degradable and very poisonous. so mediator can make 2nd pollution.- Output is low and unstable compared to general fuel cell.
The need for MBFC
Waste processing caused sludg