As environmental conditions have a great impact on the operation of diesel generator sets, there are a series of standard regulations for environmental requirements. The calibrated power of the diesel generator set is for a specific environmental condition. The environmental condition refers to the ambient atmospheric pressure, temperature and relative humidity at the operating location of the diesel generator set. They have an impact on the performance and working efficiency of the diesel generator. Great influence. When the ambient atmospheric pressure decreases, the temperature increases, and the relative humidity increases, the dry air sucked into the cylinder of the diesel engine will decrease, and the power of the diesel engine will decrease. On the contrary, the power of the diesel engine will increase.
(1) When the temperature of the cooling water in the water tank is too low, the temperature of the lubricating oil will decrease accordingly. When the temperature is low, the viscosity of the oil will be greater, and its fluidity will become worse. This will not only increase the wear of the parts of the diesel generator set, but also increase the resistance to the movement of the parts. Large, increase the mechanical power loss, and the output power of the diesel generator set will decrease.
(2) When the ambient temperature is too low, the temperature of the cylinder will be very low, and the water vapor in the cylinder will easily condense on the cylinder wall, and the sulfur dioxide generated during the combustion of the diesel generator will become condensed on the cylinder wall. Strong arrays of corrosives adhere to the cylinder wall, so the surface of the cylinder wall will be strongly corroded, causing the surface metal structure to be loose; when the cylinder liner and the piston ring rub against each other, the surface of the corrosion layer will be loose The metal wears off quickly, or corroded spots and pits appear on the working surface of the cylinder liner.
(3) Heat loss increases and fuel consumption increases. When diesel generator sets work at low temperatures, cooling water takes away a large amount of heat energy in the cylinder, which increases heat loss; the mixture cannot be formed and burned well, and fuel consumption will be reduced. Increase by 8%~10%; after the droplet of fuel enters the cylinder, it will flush the lubricating oil film on the cylinder wall and penetrate into the crankcase, increasing the wear of parts, diluting the lubricating oil in the oil pan, and increasing fuel Consumption and reduction of power output.
(4) Combustion deteriorates, and the performance of the whole machine deteriorates. Some parts that have been heated and expanded because the temperature is too low and do not expand to the expected size, which affects the working performance of the whole machine, such as the piston and the cylinder is too large and the seal is not good; The gap is too large to be impacted by the rocker arm, etc., and it is difficult to start the diesel generator. When the diesel engine is working, the high temperature of the compressed gas is a necessary condition to ensure that the fuel ignites. When the temperature of the cylinder, piston and other parts decreases, the compression will end. The temperature drop, the delay of ignition and the deterioration of the combustion conditions lead to incomplete fuel combustion, rough operation of diesel generators and exhaust smoke.
Post time: Oct-09-2020