Diesel generator sets and gasoline generator sets as two mainstream standby power solutions, there are significant differences in the technical principles, performance parameters and application scenarios.
一、the principle of combustion and ignition mechanism
1.diesel engine: compression ignition efficient combustion diesel generator sets using compression ignition mode, through the high-pressure injection system will be atomized diesel fuel sprayed into the high temperature and high pressure cylinders, the use of air compression of heat (temperature up to 500 ℃ or more) automatically ignite the mixture. This method does not require spark plugs, has a simple ignition system structure and excellent anti-explosion and vibration resistance, and is suitable for high-power continuous output scenarios.
2.Gasoline Engine: Spark plug ignition gasoline engine relies on the spark plug to ignite the fuel mixture at the precise moment, and the combustion process is controlled by the air-fuel ratio. Its ignition system needs to cooperate with the electronic ignition module and distributor (traditional model), and has higher requirements for fuel octane, which is more suitable for small and medium power and intermittent operation scenarios.
二、 power density and energy efficiency performance
1.diesel engine: high power + low fuel consumption of a single diesel generator set power covering 8kW to 2000kW, in the 75%-100% load range of energy efficiency is optimal, the fuel consumption rate can be as low as 195g/kWh. Its energy density (42.5MJ/L) than gasoline (32MJ/L) is 32% higher, suitable for long time and heavy-duty operation, such as data centers, industrial production lines and other scenarios, industrial production lines and other scenarios.
2.gasoline engine: lightweight + highly responsive power range is usually 1-10kW, suitable for light load scenarios such as home emergencies, camping equipment, power supply for small appliances, etc. Although the fuel economy is slightly inferior (consumption rate of about 250g/kWh), the start-up transient response is faster, suitable for temporary power supply needs that do not require high power density.
三、Environmental Compatibility and Regulatory Adaptability
1.emission characteristics of diesel engine emissions are mainly particulate matter (PM) and nitrogen oxides (NOx), need to be retrofitted with DPF/SCR after-treatment system to meet the National IV and above emission standards; gasoline engine mainly produces hydrocarbons (HC) and carbon monoxide (CO), the emission concentration is lower, but some regions of the emission limits for non-road mobile machinery tends to be more stringent (such as Euro V). standards).
2.Fuel Safety Diesel has a flash point higher than 60°C, making it safer for storage and transportation; gasoline has a flash point lower than -40°C, so fire prevention measures need to be strengthened to avoid high-temperature environments.
四、Application Scenario Differentiated Selection
1.Diesel generator sets
Industrial application: mining, oilfield, ship power station (power redundancy design)
infrastructure protection: highway tunnels, bridge construction (continuous power supply stability)
emergency standby: hospitals, data centers (fast start + long endurance)
2.Gasoline generator sets
Life scenarios: home backup power, RV camping
Portable equipment: power tool charging station, outdoor photography equipment
Emergency communication: temporary base station in disaster areas, emergency rescue equipment
