The selection and use of cooling water for Cummins generator sets should follow the following core principles:
Firstly, the selection of cooling water is crucial. The requirement of Cummins generator set for cooling water is first reflected in its water quality. Cooling water should be kept clean and free of chlorides, sulfides, and acidic chemicals that can cause corrosion. This is because these substances are prone to corrosion of metal components, affecting the sealing and durability of the cooling system. Ideally, the pH value of the cooling water should be controlled between 8.5 and 10.5, maintaining a low alkaline environment to reduce the risk of corrosion.
Secondly, the use and maintenance of cooling water. The coolant should be replaced regularly, and it is generally recommended to replace it every six months to avoid the accumulation of sediment in the cooling system and reduce cooling performance. When replacing, the cooling system should be thoroughly rinsed with clean water first to ensure that there are no residual old coolant and impurities in the system. New coolant can only be added after the diesel engine has been shut down and completely cooled down.
In addition, seasonal usage precautions. During the high temperature season in summer, the coolant temperature rises rapidly. Special attention should be paid to controlling the coolant temperature to avoid exceeding 95 ° C, in order to prevent serious accidents such as cylinder pulling. When the coolant temperature approaches or exceeds this limit, the machine should be shut down or the load should be reduced in a timely manner to lower the operating temperature of the unit. In winter, due to the low ambient temperature, the coolant temperature rises slowly, but it is also necessary to pay attention to its temperature changes and ensure that the water temperature remains around 80 ° C to ensure the normal operation of the unit.
Finally, the use of antifreeze. Antifreeze can prevent the coolant from boiling prematurely, increase the boiling point of the coolant, and prevent the water tank from boiling prematurely. Antifreeze also contains rust inhibitor and foam inhibitor, which can delay or prevent the corrosion and corrosion of engine water jacket wall and radiator, and effectively inhibit the generation of foam.
