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What is the difference between air-cooled versus liquid-cooled generator?


What is the difference between air-cooled versus liquid-cooled generator?


Air-cooled systems work by forcing air to the engine's metal fins around the engine cylinder only. Liquid-cooling systems, on the other hand, have a radiator and a water pump. The pump cycles the thermostatically controlled liquid coolant to the engine block through hoses, and the heat from the engine is transferred to the coolant. The heated liquid then goes to the radiator where the air cools it. Diesel generator engines commonly use liquid-cooling, but you will find all portable and most liquid propane, natural gas generators are air-cooled engines models only.

Air-cooled engines are generally cheaper to produce than liquid-cooled engines. This is because their components are less expensive to produce, need fewer parts. Air-cooled engines can easily overheat and have a much shorter engine life. Since air-cooled engines have the potential to overheat, using them full time is not recommended, nor warranted. Air-cooled engines that fail generally require either a major overhaul. Their maintenance and repair tasks tend to be more frequent and more time-consuming.

Since air-cooled engines in either portable generators or home standby LPG or LNG work at much faster speeds, they also wear out much faster. Oil break-down also happens faster and damage can occur with little warning.

Aurora Generators recommends you do NOT run air-cooled engines full-time. Shut down your air-cooled engine every few hours so it can cool. This is a good time to check your oil, add fuel and perform a general maintenance and/or inspections. All Aurora Generators are liquid cooled ranging from as small as 8kW - 30kW.

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