What is the impact of ambient temperature on diesel generators
Release Time：2020-10-23 16:56:55 Number of hits：
Due to the great influence of environmental conditions on the operation of diesel generator set, there are a series of standards for environmental requirements. The rated power of diesel generator set is aimed at a specific environmental condition. The environmental condition refers to the ambient atmospheric pressure, humidity and relative humidity at the operation site of diesel generator set, which has a great impact on the performance and working efficiency of diesel generator.
In practical application, the situation is much more complicated. What other factors will affect the normal operation of the generator.
(1) When the temperature of cooling water in the water tank is too low, the temperature of lubricating oil will decrease. When the temperature is low, the viscosity of engine oil will be larger, and its fluidity will become worse. This will not only increase the wear of parts of diesel generator set, but also increase the mechanical power loss due to the increase of moving resistance of parts, and the output power of diesel generator set will be reduced.
(2) When the ambient atmospheric pressure decreases, the temperature increases and the relative humidity increases, the dry air drawn into the cylinder of the diesel engine will be reduced, and the power of the diesel engine will be reduced. On the contrary, the power of diesel engine will increase.
(3) When the diesel generator set works at low temperature, the cooling water will take away a lot of heat energy in the cylinder, which will increase the heat loss; the mixture can not be formed and burned well, and the fuel consumption will increase by 8% ~ 10%; after entering the cylinder, the droplet like fuel will flush the lubricating oil film on the cylinder wall and penetrate into the crankcase, which will increase the wear of parts and dilute the lubricating oil in the oil pan Increase fuel consumption and reduce power output.
(4) Some thermal expansion parts are not expanded to their proper size due to low temperature, which affects the working performance of the whole engine, such as the large clearance between piston and cylinder, poor sealing, valve clearance too large and impact of rocker arm, etc., which makes the diesel generator difficult to start. When the diesel engine is working, the high temperature of compressed gas is the necessary condition to ensure the fuel ignition. When the temperature of cylinder, piston and other parts decreases, the temperature at the end of compression will drop, the ignition delay and combustion conditions will deteriorate, resulting in incomplete fuel combustion, rough operation of diesel generator and exhaust smoke.
In practical application, the situation is much more complicated. What other factors will affect the normal operation of the generator.
(1) When the temperature of cooling water in the water tank is too low, the temperature of lubricating oil will decrease. When the temperature is low, the viscosity of engine oil will be larger, and its fluidity will become worse. This will not only increase the wear of parts of diesel generator set, but also increase the mechanical power loss due to the increase of moving resistance of parts, and the output power of diesel generator set will be reduced.
(2) When the ambient atmospheric pressure decreases, the temperature increases and the relative humidity increases, the dry air drawn into the cylinder of the diesel engine will be reduced, and the power of the diesel engine will be reduced. On the contrary, the power of diesel engine will increase.
(3) When the diesel generator set works at low temperature, the cooling water will take away a lot of heat energy in the cylinder, which will increase the heat loss; the mixture can not be formed and burned well, and the fuel consumption will increase by 8% ~ 10%; after entering the cylinder, the droplet like fuel will flush the lubricating oil film on the cylinder wall and penetrate into the crankcase, which will increase the wear of parts and dilute the lubricating oil in the oil pan Increase fuel consumption and reduce power output.
(4) Some thermal expansion parts are not expanded to their proper size due to low temperature, which affects the working performance of the whole engine, such as the large clearance between piston and cylinder, poor sealing, valve clearance too large and impact of rocker arm, etc., which makes the diesel generator difficult to start. When the diesel engine is working, the high temperature of compressed gas is the necessary condition to ensure the fuel ignition. When the temperature of cylinder, piston and other parts decreases, the temperature at the end of compression will drop, the ignition delay and combustion conditions will deteriorate, resulting in incomplete fuel combustion, rough operation of diesel generator and exhaust smoke.