Diesel Generator Tech

The lube oil system of the diesel engines lubricates the rotating and moving parts and gears of the engine to minimize the effects of metal  to metal contact that causes both sliding and rolling types of friction, and to absorb great amount generated heat to achieve smooth performance and lengthening the life of the internal parts of the engine.  Functionally, the main task of the lube oil system in the diesel engine is to supply the clean lubrication oil under the required pressure and circulate it inside the engine. In most of the diesel engines the lube oil system consists of a positive displacement gear pump, chain-driven from the crankshaft, draws lubricating oil from the engine oil pan and circulates it through the system. The oil passes through a suction strainer before entering the pump, then through proper filters and oil cooler before delivery to the engine parts.  Oil is accumulated and stored in the engine's oil sump where one or more oil pumps ta...

This article mainly introduces the major components of diesel engine fuel system. Moreover,  each part is described in details. If you are interested, take a few time to read it. In most   generating unit   diesel engines, the fuel system loop consists of  the following major parts: 1. Day Fuel Tank 2. Fuel Water Separator 3. Fuel Strainer 4. Fuel Supply Pump 5. Fuel Filter 6. Fuel Injection Pump 7. Injectors 8. Return line to the day tank About Day Fuel Tank The day fuel tank is designed and fabricated with sufficient capacity to supply the diesel generator for at least 6 to 8 hours, and some times up to 12 hours at its full rated load. For small genset below 250 KW the day fuel tank is usually an integral part of the gense t skid base. It becomes a separate free-standing rectangular or cylindrical tank for bigger genset. About Fuel Water Separator Fuel Water Separator is a primary filtration unit used to remove the water from the diese...

Air intake system and exhaust system play an important role in diesel generator . The exhaust system collects the hot gases generated from the combustion and routes them out to the atmosphere. In addition, it also helps to reduce the noise  caused by the high speed flow of these gases.  The air intake system works in conjunction with the exhaust system in the turbocharged engines to pull the fresh air through the filters to the cylinders. The air filters must be maintained clean and the air going through them to the engine should have as much as possible the same ambient temperature.  What you should pay attention to is that the exhaust system must be designed to keep the resistance to exhaust flow through the system as low as possible and within the limits specified for a particular engine. After learning the function of air intake system and exhaust system, now let's turn to know about its main components. The main parts are as follows: 1. Turbocharger (bot...

When it comes to buy a diesel generator, except the price, there are a number of factors  that must be taken into considered. First thing you should consider is to know about the manufacturer history and reputation. It is always a good idea to go with a trusted manufacturer who has a reputation for producing equipment that can stand the stress and test of time. Besides, you should consider whether you will need a standby diesel generator or a dedicated generator. Dedicated generators are used when there are no other power sources on the site, or at sites that require a generator that is in use all day, every day. These are also known as prime or continuous generators. A standby generator on the other hand acts as a backup source to a pre-existing power source. These may be used when regular power is not available, during power shortages or other infrequent use situations. For industrial units, factory power requirements need to be considered along with on-site office power. Choo...

When our generator is used for a long time, it will undoubtedly result in all kinds of problems that lead to generator failure. If your generator fails to start, you can analyze the causes from the following factors. 1. Oil leaks Diesel engine generators are designed to operate with a load — most effectively in the 70% to 80% range of rated output. When generators operate considerably below the rated output level, the engine can start to over-fuel or “wet stack” which causes damage the engine. Wet stacking is the accumulation of carbon particles, unburned fuel, lube oil, condensed water and acids in the exhaust system and is caused by low combustion chamber temperature. When a diesel engine wet stacks, the engine will need to be cleaned up by loading the unit for a few hours and burning off excess fuel. 2.  Battery Power Shortage The most common failure for diesel generator is battery failure.  Battery failure is commonly the result of  low electrolyte levels ...

How does diesel engine cooling system work? The following article will show you the details. Continue reading! Diesel engines are heat-generating sources. They are cooled by circulating a water-based coolant through a water jacket, which is part of the engine. The coolant is circulated through pipes to the radiator  to remove the heat added to the coolant by the engine and then back to the engine. The typically components of the cooling system are: Water pumps Heat removing device (radiator or heat exchanger) Coolant expansion tanks (surge tanks) Temperature control valves Temperature and pressure switches and indicators Pipes Please note that  the engine water cooling systems are either closed or open systems. Closed system is designed to use the same coolant with a closed circuit, preventing the losses of the coolant. While  the open system uses the coolant once and discharges it or recirculates the coolant through systems, which cool the coolant by evapo...

Diesel engine are widely used as the prime mover for electrical power generating units in the range from 20 KW to 5000 KW.  About Engine power The power rating of the diesel engines used to drive electrical generating units are rated in KW or in HP. This is the net horsepower  or Kilowatt delivered on the shaft. K Wm is the mechanical KW. This is the engine HP X 0.746 delivered by the engine to the generator on the shaft. This power does not take into consideration the   generator   efficiency and losses. K We is the electrical KW. This is the power available at the generator terminals. This is the K Wm minus all the generator losses. These losses are usually the heat losses due to copper 12R, cooling fan losses,...etc. Engine Classification Diesel engines used as the prime mover for electrical generating units are classified in different ways. They can be classified in accordance to their ratings, number of strokes, rotational speed and duty type....

Please note that regular maintenance is the best way of ensuring your engine lats as long as possible. Engine oil is very important when you use diesel engine. Make sure you will buy a good quality oil since the poor quality oil can increase oil viscosity during service life leading to insufficient lubrication during start up and operation. To protect your machine running well, a good maintenance is necessary and important. 1. Inspect your cooling system coolant level. 2. Inspect your engine oil level. 3. Check your fuel system primary filter. 4. Make sure the oil filters you use meet or exceed the OEM filter recommended by the vehicle manufacturer. 5. Whenever  you stop at the pump for fuel try to add a bottle of diesel treatment. This helps keep impurities in the fuel from reaching your engine. 6. Check the oil level of the fuel injection pump governor. The oil level should reach the mark on the oil dipstick. Add enough amount if necessary. 7. Check the install...