Conventional fresh water cooling system | Explaned

Conventional Fresh water system

The machines installed on ships are designed to work with maximum efficiency and performance for long hours. The heating energy should be so reduced or heat transfer be increased by a cooling means to avoid a malfunction or a machine failure to prevent. For this reason the cooling water systems are installed on ships.

While there is an abundance of seawater available, marine diesel engines do not use it directly to keep the hottest parts of the engine cool. Instead, the water flows to the engine is fresh water, which is then cooled by seawater.

The engine cooling is achieved by circulating a cooling fluid around the internal passages in the engine. Therefore, the coolant is heated and itself cooled by a cooling flow of seawater. Without adequate cooling, parts of the engine, which are exposed to very high temperatures can be damaged so fast. The engine cooling allows metals to maintain their mechanical properties. The lubricating oil is sometimes used for cooling the piston, as a leak in the crankcase will not cause any problems.

Here a cooling system with fresh water  for low diesel engine speed is displayed. It is divided into two separate systems, one for the cooling coats of cylinders, cylinder heads and turbo blowers; The other for piston cooling.

The cooling water of the cylinder, after leaving the engine via a seawater cooler and circulation pump then turn the water circulation. Then pumped around the cylinder body, cylinder heads and turbo blowers/chargers. A head cap or expansion tank allows water to expand and system make-up. Venting openings are driven by the engine to the head of the reservoir for water from air exhaust cooling. A heater in the circuit facilitates the engine pre-heat in front of the hot water circuit.

The cooling system uses components similar to pistons, except that the drain tank is used instead of a head tank, and vent openings are performed at high points in the engine room. A piston cooling system
Only used to limit the contamination of the piston piston cooling glands.

Author Amit                                                                                      Article Requested By: Alice

* Various sources has been refereed before producing this post both online and offline but no part is reproduced except for the image (for reference purposes only).

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