The heat dissipation index of the air-cooled radiator of a diesel generator set is mainly affected by three aspects such as the heat dissipation area, the thermal conductivity of the material, and the ambient temperature. General material thermal conductivity parameter table The heat sink generally chooses materials with high thermal conductivity, which can help heat dissipation. Generally, the selected materials are silver, copper, aluminum and other materials. The thermal conductivity of these materials can be seen The table shows that copper and silver have high thermal conductivity and strong thermal conductivity, especially silver. The thermal conductivity is twice that of aluminum, which has a very good thermal conductivity, but its cost is too high. For diesel generators There is no need to use it. According to the reference table, aluminum is selected according to the design requirements. Aluminum itself has good mechanical strength, but also has good machinability and thermal conductivity, which can well meet the heat dissipation requirements of silent units. Structural dimensions such as the size and thickness of the radiator
In order to cover the different requirements of each power supply system, the following four types of diesel generator set performance levels are defined: (1) G1 level This class of diesel generator set is suitable for use: only its basic voltage and frequency parameters are required to connect the load. Example: General purpose (lighting and other simple electrical loads) (2) G2 level This class of diesel generator set is suitable for use: its voltage characteristics are very similar to those of public power systems. When the load changes, there may be temporary but permissible deviations in voltage and frequency. Examples: lighting systems; pumps, fans and hoists. (3) The G3 level is suitable for the use of diesel generator sets: the connected equipment has strict requirements on the frequency, voltage and waveform characteristics of the generator set. Example: Telecom and thyristor controlled loads. It should be recognized that load pairs controlled by rectifiers and thyristors
The effective adjustment of the rotational speed can ensure that even when the external load fluctuates or changes greatly during operation, the diesel generator set can adjust the fuel supply of the injection pump to ensure the stability of the rotational speed. So the solution to the stability of the diesel generator set is the governor with excellent performance.
According to the requirements of the maintenance regulations, diesel generators should be 5-10 minutes of no-load test machine per month. Many people in the industry believe that the time of no-load test machine should be the lower limit specified in the maintenance rules, which is 5 minutes. Cummins and many other brands of diesel generator sets clearly state that the no-load test time can not exceed 5 minutes. Because the diesel generator set runs for a long time with no load or idle speed, it is easy to produce carbon deposits, which will reduce the engine output power, affect the output of the entire unit, and even cause the phenomenon of normal operation. Once the load is actually loaded, the diesel generator set will not be normal. Major failure of output power. Formation and hazards of carbon deposits: Because the temperature of the combustion chamber is too low, the fuel cannot be completely burned, which will cause carbon deposits, which will block the nozzle holes and piston rings of the fuel injectors, and there will be "black oil" overflow from the exhaust pipe. It may also cause the valve to get stuck. Some unburned diesel will scour the
Recently, Xingguang Company and Shenyang Yuhong District People's Hospital signed a purchase contract for a diesel generator set
Xingguang Company and Tianjin Binhai Kaiyuan Real Estate Development Co., Ltd. signed a diesel generator set purchase contract
Recently, Xingguang Company and Yunnan Jiantou Installation Co., Ltd. signed a 823kw diesel generator set with a normal load of 823kw and a backup load of 900kw. This generator set is used as a backup power source for the Kunming Public Security Bureau's business technology rooms.
Recently, Xingguang Company signed a 600kw Shangchai diesel generator set with Jilin Henglida Trading Company,
Diesel generator sets
Recently, Xingguang Company and Greenland Northeast Division signed a 360kw and a 400kw Yuchai diesel generator set, the specific configuration is: 360kw: Engine: Guangxi Yuchai YC6T550L-D21, Generator: Guangzhou Inge EG315L-360N, control Device: British deep sea; 400kw: Engine: Guangxi Yuchai YC6T600L-D22, Generator: Guangzhou Inge EG315L-400N, Controller: British deep sea.