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How to Prevent Diesel Generator Sets from High Temperature

Aug. 18, 2018

With the increase of temperature in summer, the demand for electricity will also increase, so more diesel generators will be used, so what should we pay attention to in the process of using diesel generators in summer? The following is a detailed introduction of the six points for attention when diesel generator sets are used in summer.

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1. Good ventilation to avoid high temperature.


The installation place should be well ventilated, the generator end should have enough air inlet, and the diesel engine end should have good air outlet. The air outlet area should be more than 1.5 times larger than the water tank area. 

Reminder: diesel generator SET should not run in the sun exposure to high temperature environment, in case the generator block heating too quickly lead to failure.



2. Keep clean


Keep the installation area clean and avoid the presence of corrosive gases and vapors, such as acidic, alkaline, etc. It is best to install fire extinguishing devices.



3. Exhaust smoke unobstructed


In indoor application, the exhaust pipe must be led outside, the diameter of the pipe must be ≥ the diameter of the exhaust pipe of the silencer, the elbow of the connected pipe should not exceed 3, in order to ensure the smoke discharge is smooth, and the pipe should be inclined down 5-10 degrees to avoid Rain Water injection; If the exhaust pipe is installed vertically up, a rain shield must be installed.


4. Shockproof


When the foundation adopts concrete, the horizontal degree of the unit must be measured with the horizontal ruler during installation, so that the unit is fixed on the horizontal foundation. Between the unit and the foundation shall be a special shock cushion or bolts with bottom foot.



5. protective ground connection


The generator unit shell must have reliable protective grounding. For the generator which must have neutral point direct grounding, it must be neutral ground by professional personnel, and be equipped with lightning protection device, it is strictly forbidden to use the electric power earthing device to conduct neutral point direct grounding.


6. bilateral switch


The two-way switch between generator and power must be very reliable to prevent power from being sent backwards. The connection reliability of the two-way switch needs to be verified by the local power supply department. Local power supply department inspection approval.


Since the diesel generator set itself produces high temperature when it is in operation, with the increasing of the external temperature in summer, how to prevent the safe use of diesel generator set in the high temperature weather is often concerned by many users. Below by starlight small to introduce the diesel generator summer maintenance method.


1. Ensure sufficient circulating cooling water


First of all, the circulating cooling water in the diesel generator tank should be kept in sufficient condition so that the maximum heat dissipation can be achieved during the operation of the diesel generator.


2. Keep the coolant in place


When the engine is in a cold state, the coolant level shall be added in time if the liquid level is lower than the minimum mark of the expansion tank between the top and lowest marks of the expansion tank. Note that the coolant in the expansion tank cannot be filled and should leave room for expansion.



3. Correct use of closed cooling system


When the engine is working, the coolant vapor enters the expansion tank and then flows back to the radiator after cooling, which can prevent a large amount of evaporation loss of the coolant and raise the boiling point temperature of the coolant. The cooling system should use high quality coolant with anti-corrosion, anti-boiling, anti-freezing and anti-scale, and must be sealed in order to achieve results.


4. Maintain external and internal cleanliness of the cooling system


The radiator of generator set has soil on the outside, oil stain or heat sink will affect the passage of wind when it is deformed due to impact, and the radiator becomes worse, which results in the excessive temperature of the coolant. So the radiator should be cleaned or trimmed in time.


Additionally, the heat transfer of the cooling fluid will be affected by the fouling in the cooling system, when the fouling is accumulated in the sand or oil. The fouling in the cooling system will increase if the poor quality coolant or water is added, and the heat transfer capacity of the fouling is only one-tenth of that of the metal, thus the cooling effect will be worse.


5. Operator standard operation



Because the temperature is high and the operation staff of the diesel generator set are relatively few, at this time, when operating the diesel generator set in the generator room, we must pay attention to safety in order to prevent the water in the water tank of the diesel generator set from opening the pot because of the high temperature. It is possible that water will splatter and hurt people everywhere.



The use of diesel generator sets can help solve the local demand for electricity, but also lead to a large amount of energy consumption and emissions pollution. Therefore, the scientific and reasonable use of diesel generating sets is a matter of concern to users. In addition to operating according to the requirements of the operation instructions, the rational collocation of the magic capsule energy-saving equipment is also one of the effective means for the correct use of diesel generator sets.


With the sudden rise of temperature in summer, the diesel generator set is forced to shut down because of the high water temperature in the operating load, so it is forced to stop because of the high temperature alarm of the unit, so there are many reasons for this phenomenon?


This kind of situation is usually due to the high operating environment temperature of the generator set in summer, which causes the cooling water temperature to be too high and the automatic protection shutdown, which belongs to the normal protection shutdown, which can also be said to be the no-fault shutdown. However, some of them are fault alarm downtime, as follows:


1. The generator set is overloaded and the fuel supply is too large.

2. Diesel-generator water tank leakage or insufficient water, water tank channel fouling too thick or excessive heat sink oil pollution.

3. Pump wear, pump water shortage; thermostat opening angle is not enough, there is stuck phenomenon.

4. The cylinder liner is worn too much, local seepage.

5. The cylinder cushion is washed out, the water channel is connected with the cylinder, and the cooling water temperature rises suddenly.

6. Fan belt wear is too large, pressure is insufficient.

7. Water temperature sensor damage caused by false alarm shutdown.




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