[Company Introduction]

Since its foundation in February 1980, as the manufacturer of heat-exchanger for the marine, petro-chemical and power generation industry, 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 a temperature of seawater and clean water as well as opening/closing location of 3-way valve, and supplies the optimized energy to central seawater cooling pump of the ship at sea.

- Operating Principle

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

water and the position of 3-way valve.

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

3) E/R VENTILATION FAN : Step controlling by under 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 : Controlling 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