Cooling tower location
Hazardous area
Cooling tower fog control
Winter operation
Cooling water 화학적 처리 목적
냉각 표면의 SCALE 방지
Cooling water와 접촉되는 금속의 부식 방지
냉각 탑 자체와 냉각표면의 FOULING 방지
COOLING TOWER TIMBER
water flow direction, inlet locates downside and outlet locates upside.
Through this, we can know that axial impeller is not suitable. Also, because of wide width of tank, it has poor mixing.
Second, there is a problem with chemicals. PAC is injected with Cl2, so activation of Cl2 must be restricted.
Also, using alum may cause settling.
Alum lowered pH in localized area. To overcome this
Two Sources of body water gain
- internal production : Water produced from the oxidation of organic nutrients
- ingestion : water ingested in liquids and foods
Four sites that lose water
- skin, respiratory air ways, gastrointestinal tract, and urinary tract
- Menstrual flow (in women)
The body gains sodium and chloride by ingestion and loses them via the skin (in sweat
2. 표면처리 (전처리)
도료는 도장을 하기 위한 제품에 불과하며 도장 작업에 관계없이 도료의 품질에 따라 도장효과가 좋게 나타나는 것은 아니다. 도장 효과(도막 성능)에 미치는 도료의 기여도는 5%에 불과하며 나머지 95%는 여러 가지 도장에 관계되는 기타 인자 (표면처리도, 도장 환경, 도막 두께,
Air pollution Cost for road transportation is 3,067 won/TEU-km??
ONLY 200 won/TEU-km!!
What about CO2 Exhaustion?
85.9 g / ton km >35.6 g / ton km
It is necessary to reduce greenhouse gas exhaustion quantity due to Kyoto protocol.
Canal transportation exhausts much less gas compared to that of road transportation.