Cooling Water Principle

The Principle of Cooling Water
Simple Heat Transfer.

A. Heat Exchanger are used for industrial process cooling.
Common Measurement of Heat: A BTU is the amount of heat required to raise the temperature of 1 lb of water 1 oF.

B. The Fundamental of Cooler
Why water use as cooling media?

Available in huge amount, easy to get and cheap

• Easy to operate
• Can bring heat in a huge capacity ( cp = 1 kcal/kg.oC)
• Expansion degree and contraction smaller compare with the temperature increase.
• No compromise

Fundamental of Cooling Water
Why water can not perfect as cooling media?
The weakness of water contain of impurities;

• Suspended Solid
• Dissolved Solid
• Dissolved gas

Water Source:

• Surface Water
• Ground Water
• Sea Water

Clean Water Need Increase

Water crisis in the world become clearer lately, for certain country never get water supply even from the sky. These countries have dry season all the year. While other countries get water too much even flooding everywhere, but this water can’t be used because not clean. Water flooding mixed with others like with waste and other poisonous materials and other contaminated materials.

Clean water is essential to our life. The amount of fresh water on earth is limited, and its quality is under constant pressure. Preserving the quality of fresh water is important for the drinking-water supply, food production and recreational water use. Water quality can be compromised by the presence of infectious agents, toxic chemicals, and radiological hazards.

About 13% of world population still rely on unimproved water sources like surface water from lakes, from rivers, dams or unprotected dug wells or springs. This water source use for drinking, cooking, bathing and other domestic activities.

The need of clean water always increase year by year. In low income countries, the annual rate of increase needs to double to achieve the target and efforts to narrow the gap in coverage between urban and rural areas need to be intensified.