Diesel Engine Generator

Diesel Engine Generator Cooling System

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Cooling System for an engine is one of the most important parts. Each engine has its own cooling system. We use a different cooling system for a different engine. Water cooling, Oil cooling, Air cooling is the most common cooling system. In this post, I will discuss the Diesel Engine Generator Water cooling system.

Explanation of Diesel Engine Generator Cooling System:

If we burn diesel inside the engine then it will become hot. For this reason, we use water inside the engine and it reduces engine inner temperature. This method’s name is Jacket Water Cooling System. Let’s learn more about this cooling system.

Jacket Water Cooling System is normally two types: – a) Open Circuit Cooling System b) Closed Circuit Cooling System.

  1. Open Circuit Cooling System: Usually in this method, the engine is cooled by water from the external source like ponds or water tanks.
  2. Closed Circuit Cooling System: In this method, the water reserved inside the engine and the radiator or a heat exchanger is used to cool the water during engine running time.

Now I am going to discuss the Engine Cooling System and I am going take an example of Caterpillar Diesel Engine Generators. Normally Caterpillar Diesel Engine Generators use Closed Circuit Cooling Systems.

The main parts of this cooling system include jacket water transfer pump, radiator, coolie fan, thermostat, fan belt, radiator expansion tank, jacket water temperature sensor, etc.

Related: How to Start and Stop the Waukesha Gas Generator?

How Jacket Water Cooling System Works?:

Normally when the generator engine starts then the engine jacket water pump is turned on. This water pump used to drag the water from inside the engine and send it to the radiator and after cooling, it sends back cold water to the engine.

When the engine starts, the thermostat valve of the cooling system stays closed so that the engine water can just only flow inside the engine. After running for a while, the temperature of the water increased almost 80-850C then the thermostat valve opens automatically.

Now the hot water from the engine goes to the radiator. Air flows through the fan on the radiator and for this reason the radiator’s water becomes cold. After cooling, water goes back to the engine and cools the engine.

However, by using this cooling system some other hot areas use to cool like Lube Oil Cooler, Turbo Charger, Cylinder Head, Engine Liner and After Cooler.

Jacket Water Cooling System Problems and How to Solve?:

Fresh air movement is very important for this kind of engine. If the engine placed in a surround small place then the cooling system will not work properly. The jacket water level at the engine’s radiator will be checked so that there is never water emptiness in the radiator.

Radiator water cannot be cold properly due to dust inside the radiator. For this problem sometimes the radiator should be cleaned. Check the radiator fan. If needed radiator fan belts need to be adjusting again. Should check the jacket water pump is working properly or not.

If the jacket water thermostat does not work properly then the water cannot go to the radiator. Then the jacket water temperature will increase in the engine. So the valve needs to check and if needed change the thermostat valve. In the engine jacket, water chemicals must be given.

It protects the engine’s cooling system and prevents rust from other parts. In winter season the engine is usually staying cold so the engine’s jacket water temperature stays low. In this situation sometimes the alarm came when the engine started. If the engine running a little more time then the alarm goes away.

Related: Caterpillar Diesel Engine Generator Troubleshooting Procedure

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