1.Introduction
A fuel cell is a device that converts the chemical energy of a fuel (hydrogen, natural gas, methanol, gasoline, etc.) and an oxidant (air or oxygen) into electricity. A fuel cell operates like a battery. However, a fuel cell does not require recharging, it produces electricity and heat as long as fuel and an oxidizer are supplied.
Fuel cell construction generally consists
About permeability importance
From the inside which will bite flowing in the water
– Gap among is connected each other and from the place which is high flowing with the low-end place
Is caused by with permeation and power affects in stability
(When there is permeation type, gap hydraulic pressure increase -> Effective stress decrease -> Shear strength decrease -> In stability fa
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
that it did not have any antitrust objections, Delta completed its $2.8 billion acquisition of Northwest.
● Current trends
- They use variety social network service program and global network.
-Affected by rise of an oil price. Because airlines most big expense is fuel tax.
●Current strategies
① Launched global joint ->20 May 2009. Air France KLM group and Delta Air
the main culprit of air pollution, but people are beginning to understand the diesel car in a different way. The clean diesel engine has a mechanism of compressed air and blast, and it enables the engine to generate the same power as gasoline engine with 30-40% less fuel. It is recognized as an environmentally-friendly car in Europe and is even being referred to as having a ‘Green Engine’. 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 are trying alternative energy is concern about pollution and climate change caused by the use of fossil energy.
So, we needed an alternative source of energy for our own good.
Also, we called for investm
I2사의 Rhythm은 현재 SCM Market에서 가장 점유율이 높은 제품으로 가장 전형적인 ASP(Advanced Planning and Scheduling)계열이다. Rhythm의 대표적인 모듈로는 다음과 같은 것들이 있다.
DP(Demand Planner) – 각종 통계적 Forecasting 기능과 OLAP 기능을 통합한 수요예측 도구이다. DP를 통하여 입력된 Forecast는 Rhythm
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
1. 차세대 엔진의 현황
위기 뒤에는 기회가 찾아온다고 했던가.
산업혁명의 기원에는 우리가 알지 미처 알지 못한 숨겨진 사실이 있었다. 인류에게 유래 없는 물질적 풍요를 안겨준 산업혁명, 그 산업혁명을 촉진하게 된 계기는 16세기 중엽 이후의 목재 자원의 고갈이었다. 이 연료 위기를 극복하
Fuel Cell)는 수소 연료의 장점과 오염물질을 배출하지 않는 다는 점에서 주목받고 있다.
그럼에도 불구하고 연료전지 작동 시 발생되는 물과 열로 인한 내구성 감소와 효율 저하, 고분자막의 비싼 가격등 여러 가지 문제로 인하여 상용화를 이루지 못하고 있다.
PEMFC의 실제 전압은 비가역성에 의한