Usually 120 hours.
Use two glass test tubes with a diameter of 0.5 cm and a length of 20 cm, and fill them with 19 cm of new engine oil and used engine oil. After sealing, reverse it. two tubes together and save. When the bubbles rise, if the difference between the two exceeds 20%, it means that the viscosity of the used engine oil has dropped too much and needs to be replaced.
Compare a drop of new engine oil and a drop of used engine oil on the white filter paper. If there are more black spots in the used oil droplets, it means the engine oil has not gone bad and should. not be replaced; If the engine oil is dark brown, it indicates a metamorphosis and should be replaced.
Precautions for gasoline generators
When the gasoline generator is operating, due to the high temperature generated by the componentss involved during the combustion process, gray carbon polymers adhere to the valves, valve seats and fuel injectors. , and the pistons. Failure to clean the top and other parts in time will increase fuel consumption and seriously affect the normal operation of the engine. Under normal circumstances, they should be cleaned once every 4 to 6 months.The gasoline generator engine cooling water temperature is maintained at approximately 45-65°C. If the water temperature is too low, it will cause incomplete combustion of the gasoline generator and increase the load on the machine itself. Use mineral-free “soft water” (such as distilled water, rainwater) for cooling water, and do not overuse sewage or muddy water.
According to the national standard, a gasoline generator generates 270 grams of gasoline per kilowatt hour at full load, the consumptionon of fuel of 1 kW per hour is 1*0.27=0.27 kilograms. . Conversion The unit of liters is: weight divided by gasoline density 0.722 equals 0.374 liters, that is, at full load, a 1 kW gasoline generator consumes 0.374 liters of fuel per hour.
Your current power is 3000 W, which means that at full charge in one hour you will consume 1.122 liters of fuel. According to the current 7.8 yuan per liter, you will have to spend 8.7516 yuan. A standard household gasoline generator generates 270 grams of gasoline per kilowatt hour. At full load, the fuel consumption of 1 kW per hour is 1*0.27=0.27 kilograms.
Converted to liters: weight divided by gasoline density 0.722 equals 0.374 liters, i.e. at full load a 1 kW gasoline generator consumes 0.374 liters of fuel per hour, which means you are now at 3000W. que Once fully charged in une hour, you will consume 1.122 liters of fuel. According to the current 7.8 yuan per liter, you will have to spend 8.7516 yuan.
The generator generates 3 degrees of electricity per hour, and the heat equivalent is: 1 hour * 3 kilowatts * 860 kcal * / 0.8 efficiency = 3225 kcal.
The calorific value of gasoline is 10,200 calories per kilogram, so the amount of gasoline consumed per hour is: 3,225/10,200 = 0.3162 kilograms, or approximately 0.4 liters .
Based on the specific fuel consumption of diesel engines, 1 kilowatt of energy consumption per hour is equivalent to approximately 0.3 liters, and 15 kW of fuel consumption per hour = 15*0. 3 liters = 4.5 liters.
Diesel generator refers to the It is an electric machine that uses petroleum as fuel and a diesel engine as the main engine to drive a generator to produce electricity.
The diesel engine converts thermal energyue released by the combustion of diesel into kinetic energy, and the generator converts the kinetic energy into electrical energy! However, some energy is lost with each conversion! In order to conveniently describe thermal efficiency, most diesel generator manufacturers use the parameter G/KW.H, which means how many grams of oil one kilowatt consumes per hour. If you convert this unit to liters, you can immediately find out how many liters. are consumed. Oil, so you can also find out how much it costs per hour;
Some manufacturers also indicate directly L/H, that is, how many liters of oil are consumed per hour. It's enough, no problem, feel free to use it. @_@Your power is about 9 kilowatts, and the current is 40.9 A. The interception capacity of 4 square meters of copper wire is 33 A, so it is safer to use at least 6 square meters of wirecopper. It is recommended to use 10 square meters of copper wire. It's not enough. Check with an electrician's manual.
The safe interception capacity of 4 square meters of copper wire at an ambient temperature of 40 degrees is 33 A. Over time, the wires will heat up and the insulation will age, causing accidents short circuit. is within the nominal range.