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A Guide to Diesel Generator Cooling Systems

For many years, diesel generators have been the power generation solution of choice for commercial and industrial applications. Whether they are running to provide prime or standby power, these machines are known for their reliability, durability, and cost-effectiveness. One of the key components that allow these engines to function so well is their cooling system. Here’s some insight into how these systems work.
Air-Cooled Diesel Generators  

Air-cooled systems are usually found in standby power and lower kW rated generators. These systems use fans to air drawn from the surrounding environment to cool the engine as it runs, blowing the air through the internal structure to draw heat away and prevent the system from overheating. These are very simple cooling systems, not requiring a radiator, coolant or pump system, which helps to keep maintenance to a minimum. The downside is that air-cooled diesel generators run fans that can add significantly to the noise factor. 

Obviously, ventilation is exceptionally important for these diesel generators. Without enough air circulation, the engine can quickly overheat, causing the generator to shut down to prevent permanent damage. This makes it a challenge to reduce operating noise levels without affecting airflow. However, these generators are also fairly affordable to buy and run, which makes them a good choice for low power or standby power generation. 

Liquid-Cooled Diesel Generators 

Liquid cooling systems are common in larger-capacity diesel generators, including those used for prime power generation. They have an enclosed cooling system that utilizes a coolant that is pumped around the engine block through a system of hoses. The heat from the engine is transferred into the coolant, which is then circulated to a radiator where the heat is released and the liquid is cooled. 

These more complex systems mean more maintenance throughout the year including frequent checks of hoses and connections for coolant leaks and the monitoring of coolant and also antifreeze levels in colder climates. Because of this closed pump system, these generators can be modified for significant noise reduction using custom-built enclosures without putting the generator itself or power generation at risk. Compared to air-cooled generators, liquid-cooled generators are more expensive – but they are also more durable and powerful, so are worth the additional investment if your power needs are significant. 

Buy or Hire Commercial and Industrial Diesel Generators  

Energy Power Systems Australia is the leading provider of commercial and industrial diesel generators in Australia. Our team, which includes experienced engineers and support technicians, has worked extensively on large-scale projects for a wide range of industries, including the agriculture, facilities management, mining, oil and gas, and marine sectors.  

In addition to world-class CAT equipment and power generation solutions, we offer affordable financing and equipment hire solutions, along with exceptional sales, engineering, and after-sales support. 

For more information on the power generation solutions and industrial equipment we offer, please contact us today. 
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Location: 227 Wellington Rd, Mulgrave VIC 3170, Australia

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