localtemperature difference)ΔT이다.
그림 1에서와 같이 ΔT는 관의 길이에 따라 상당히 변한다.
그리고 열속이 ΔT에 비례하기 때문에, 열속 역시 관 길이에 따라 변하게 된다. 그래서 미분식을 사용할 필요가 있다.
이 미분식은 국부 온도차 ΔT하에서 미분 면적 dA에서 미분열흐름 dq가 일어남을 표시하게 된
Sulfur Dioxide(SO2)
The release of SO2 to the atmosphere is the primary cause of acid rain in the world.
Fossil fuel combustion at electric power-generating plants accounts for about70% of
the emissions.
Coal, Oil, and all other fossil fuels naturally
contain some sulfur.
Volcanic eruptions are another more localized natural source of SO2
SO2 + OH. HSO3.
HS
High-temperature decomposition
High-temperature splitting of water occurs at about 3000 °C. At this temperature, 10% of the water is decomposed and the remaining 90% can be recycled. To reduce the temperature, other processes for high temperature splitting of water have been suggested:
▸Thermo-chemical cycles.
▸Hybrid systems coupling thermal decomposition and electrolytic
Global Trend towards Protecting the Ozone Layer
Global Convention and Protocol
The Vienna Convention (for the Protection of the Ozone Layer)
The Vienna Convention is a treaty concerning the customary international law on treaties between states. It codifies some groundwork of international law trying to protect the ozone layer. The US was the one the biggest producers and consumers of