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The Relationship Between Diesel Consumption and Load of Diesel Generator Sets

Sep. 08, 2021

It is generally believed that the fuel consumption of a diesel generator set must be directly proportional to the load it runs. The greater the load the diesel generator runs, the greater the fuel consumption. The smaller the load the diesel generator runs, the lower the fuel consumption of course. As a manufacturer of diesel generator sets, we will analyze the relationship between the two with you, hoping to give you some help:


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Most users think that diesel generator sets of the same brand and model will consume more fuel when the load is large, and on the contrary, when the load is small, the relative fuel consumption will be lower. Under normal circumstances, this statement is correct, but under special circumstances, it is a different matter. For this reason, we have found a set of data and analyzed it with you. You can refer to:


The operation of the diesel generator set will cause a certain power loss due to the mechanical transmission and its own heat consumption, and this part of the energy comes from the consumption of diesel. Generally, the actual situation is that the fuel consumption is the lowest when the load is 80%. If the load of the diesel generator set is 80% of the rated load, one liter of oil will generate 3.5 kWh of electricity. If the load increases, the fuel consumption will increase. It is often said that the fuel consumption of a diesel generator set is proportional to the load. However, if the load is lower than 20%, it will have an impact on the diesel generator set. Not only will the fuel consumption of the diesel generator set be greatly increased, but it will even damage the power generation diesel generator set.


This is not much the same as the economic speed of a car. When the speed of a car is 90 km/h, the fuel consumption is the smallest. If the vehicle speed is less than 90 or greater than 90, its fuel consumption will increase. Therefore, the view that the fuel consumption of a diesel generator set is proportional to the load is not absolute. If you want to reduce the fuel consumption of the diesel generator set, you can run the diesel generator set at about 80% of the rated load. Don't run it at low load for a long time, otherwise the increase in fuel consumption will be a small matter and the damage to the diesel generator set will be serious.


As a professional diesel generator manufacturer, we always insist on using first-class talents to build a first-class enterprise, create first-class products, create first-class services, and strive to build a first-class domestic enterprise. If you would like to get more information welcome to contact us via sales@dieselgeneratortech.com.

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