[Company Introduction]

Since its foundation in February 1980, as the manufacturer of heat-exchanger for the marine, petro-chemical and power generation industries, DongHwa Entec has been focused on research & development, product performance improvement as well as new product development while establishing the most competitive facilities and production processes.

[Product Description]

- E.S.S (Energy Saving System) is an intelligent control system to optimize central seawater cooling system of the ship. This system sensors the temperature of seawater and clean water as well as opening/closing location of 3-way valve, and supplies the optimized energy to the central seawater cooling pump of the ship at sea.

- Operating Principle

1) C.S.W PUMP : Monitors temperature of sea water, low temperature of fresh water and

                             the position of 3-way valve.

2) F.W PUMP : Controlled by F.W. inlet’s T/T of Central Cooler and pump’s P/T

3) E/R VENTILATION FAN : Step controlled via variable M/E load. In addition, by detecting

                                               inlet's high temp and negative pressure in engine room, helps

                                               the ship to adequately sail.

4) CARGO HOLD FAN : Controlled by checking temp of cargo room.

[Product Specification]

- The advantage of ESS

• High energy saving rate up to 40% • CO2 Reduction according to

Save fuel oil(DO, HFO) • Automatic flushing - Anti-fouling - Adjust flushing timing

• Stability of system - Set the minimum flow-rate • Continuous operation variable

pump speed control • Reduction in the start current