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Advantages and Disadvantages of Diesel Generating Sets
- Sep 05, 2017 -


Diesel generator set features:


(1)stand-alone capacity level.

(2)the supporting equipment is compact, the installation site is flexible (water-cooled as long as 34 ~ 82L / KW · H steam turbine 1/10)

(3)high thermal efficiency , Low fuel consumption (thermal efficiency 30 ~ 46%)

(4)start quickly, and can quickly reach the full power only a few seconds, emergency 1 minute with full load (normal 5 ~ 30MIN) downtime is short, Frequent start and stop.

(5)maintenance is simple, few people, easy maintenance during the spare period

(6)diesel generator sets the lowest cost of construction and power generation


Diesel generator sets advantages:


(1)fuel economy, high thermal efficiency, changes in operating conditions, the fuel consumption rate curve is relatively flat, low load is also economic

(2)reliable and durable.

(3)the use of a wide range

(4)low harmful emissions

(5)fire safety and good generator automatic voltage regulator are: SCR, phase compound excitation, TD1 type carbon Resistance automatic pressure regulator, the individual use of high-power tube. Diesel generator set Disadvantages:


Diesel generator error operation will seriously affect the life of diesel generating units, let's take a look at the daily operation of diesel generator sets wrong mode of operation which?


(1) Diesel generator error operation 1: Diesel engine running in the oil shortage at this time due to insufficient supply of oil caused by the friction surface of the fuel shortage, resulting in abnormal wear or burn. To this end, before the start of diesel generators and diesel engine operation to ensure adequate oil to prevent the lack of oil caused by pull cylinder, burner failure.

 (2) Diesel generator error operation 2: Emergency shutdown after load or sudden unloading of the load immediately after the shutdown of the diesel generator after the shutdown of the cooling system of water to stop the cooling, cooling capacity drastically reduced, the heating parts lost cooling, easy to cause cylinder head, cylinder Sets, cylinder blocks and other parts overheating, resulting in cracks, or excessive expansion of the piston stuck in the cylinder liner. On the other hand, the diesel generator downtime without idling cooling, will make the friction surface oil shortage, when the diesel engine will start again due to poor lubrication and wear. Therefore, the diesel generator should be unloaded before the shutdown load, and gradually reduce the speed, no-load operation for a few minutes.

(3) Diesel generator error operation three: after the cold start is not warm up with load operation diesel generator cold start, due to oil viscosity, poor mobility, oil pump is insufficient, the machine friction surface due to lack of oil lubrication Bad, causing rapid wear and tear, and even the occurrence of cylinder, burning tile and other failures. Therefore, the diesel engine cooling should be idle after the start of heating, when the oil temperature reaches 40 ℃ or more when the load operation; machine starting should be linked to low speed, and in a row in each gear for a period of time until the oil temperature is normal, Before they can turn to normal driving.

(4) Diesel generator error operation 4: diesel engine after the cold start thump throttle thunder throttle, the diesel generator speed increased sharply, will cause some of the friction on the machine due to dry friction and severe wear. In addition, the throttle when the piston, connecting rod and crankshaft force changes, causing severe impact, easy to damage the parts.

(5) Diesel generator error operation 5: In the case of insufficient cooling water or cooling water, oil temperature is too high to run diesel generator cooling water will reduce its cooling effect, the diesel engine due to lack of effective cooling and overheating; Water, oil oil temperature is too high, but also cause the diesel engine overheating. At this point the diesel generator cylinder head, cylinder liner, piston components and valves and other major heat load, its mechanical properties such as strength, toughness and other sharp decline, so that parts deformation increases, reducing the gap between the parts, , Serious when there will be cracks, mechanical parts of the fault. Diesel generator overheating will also worsen the diesel engine combustion process, so that the injector work disorders, poor atomization, coke increased.