What is Bioenergy?
Bioenergy is renewable energy made available from materials derived from biological sources. Biomass is any organic material which has stored sunlight in the form of chemical energy. As a fuel it may include wood, wood waste, straw, manure, sugarcane, and many other byproducts from a variety of agricultural processes.
So, Why do we produce Bioenergy?
One reason governments
기관의장 설계 편
A. 기장설계의 정의
조선소에서 하는 선박의 기관부(機關部) 관계의 설계와 공작. 기관의장 설계라고 하면 일반적으로 배관설계를 말하는 것인다. 구체적으로 기관배관SYSTEM, 기관배관, 기장철의장, 기장 축타 설계로 구분이 된다.
B. 기장설계 업무
기장설계는 “기관실에 대한 의
로터리 engine
- 적은 배기량으로 큰 힘을 낼 수 있다.
- 엔진의 진동이 작고
- 부가적인 부품이 적어 소형화
- 고회전이 가능
디젤 engine의 작동 원리
점화 플러그 없이 고압의 연료를 분사시켜 연소
(중략)
GDI engine이란?
• Gasolinr Direct Injection
(가솔린 직접분사 엔진)
• 연료를
This idea can be applied to logistics as well. In the past, logistic cost has been defined in purely monetary terms. However, as not only in the EU but also in the USA and other countries became more and more aware of environmental problems ,for instance because of climate change, air pollution, noise and accidents, environmental considerations has been taken in logistics kfield. This is how Gree
③ Environmentally-responsible aviation : By March 2010, EU-based airlines must provide carbon dioxide emission reports. That’s why, over the last six months, several EU airlines have begun using bio-fuel either wholly or in part on certain routes. This trend is now spreading to North America where several airlines have indicated their interest in buying eco-friendly jet fuel.
3. History w
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
Targeting
Baby boomers have memories about Beetle. They feel dim memories about Beetle in younger to see New Beetle. And now their children are independent, so they live alone or live with mate. They also have economic power. So, they have many advantages like that memory of beetle, and popularities high. But, despite of these advantages, baby boomers prefer to sedan or SUV.
But young genera
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
2) Managing external debt using sustainability indicators
External debt management involves balancing resource mobilization and deployment as well as orderly repayment of future obligations. For sustainable debt management, policy makers need to project accurate debt dynamics that are sensitive to the way the current account deficits are being financed. If borrowed resources are not used produ