Problems with low-speed warm-up of the engine set
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To all users of the engine set, during the low-speed warm-up process, what should be the rotational speed, keeping it below a certain value? How long does the low-speed warm-up time last? How is the end of the low-speed warm-up process determined?
The rotation speeds for warming up different units vary. There are those at 800 r/min and also those at 1000 r/min. Cold start-up requires strict adherence to the unit’s speed-up curve. It is usually provided by the machine manufacturer. Driving in hot conditions allows for skipping low-speed warming up or reducing the warming-up time significantly.
The speed for low-speed warm-up is determined by factors such as the model of the engine and its maximum RPM, the bearings, and the acceleration curve; it is generally between 800 and 1000 revolutions per minute
Generally, it is warmed for half an hour, with vibration, tile temperature, and the values specified by the manufacturer.
Generally, 10% of the maximum continuous speed is taken as the minimum continuous speed; specifically, this is usually determined according to the manufacturer’s speed-up curve. However, as long as vibration, thermal expansion, and temperature are within normal ranges, it is best not to warm up the equipment at low speeds for too long, as this is not good for dry gas seals.
The speed for low-speed warm-up is determined according to the manufacturer’s specifications; generally, the warm-up time is half an hour. The low-speed warm-up time should not be too long to prevent the exhaust temperature from becoming too high.
Different units have varying warm-up speeds; generally, it’s between 500 and 1000 revolutions per minute. At this speed, an optimal oil film is formed. Excessively high speeds result in steam waste. The warm-up time is specified by the manufacturer, but there is no clear criterion for determining it. Occasionally, the temperature of the cylinder block is used as a reference, but I’ve only heard of this practice without having seen it myself. An excessively long warm-up time leads to high exhaust temperatures, which can be harmful to both the unit and the surface coolers.
What was said upstairs is already very good: the time should not be too long nor too short; it needs to be determined based on the manufacturer’s specifications and one’s own experience. Generally, the time before reaching the critical point is considered low-speed warm-up time