The function of the fuel tank

The function of the fuel tank

The fuel tank is a key component of the generator system, responsible for safely storing fuel and ensuring a stable fuel supply.   Different fuels have different requirements for the design, materials and functions of fuel tanks.

I. Application and Advantages of Fuel Tanks in Diesel Generators

1.   Application features

Large-capacity design: Diesel generators are often used in long-term power supply scenarios such as industries, buildings, and data centers, and the fuel tank capacity is usually large (500L to 10,000L).

Corrosion resistance: Diesel has a relatively high sulfur content, so the fuel tank should be made of anti-corrosion materials (such as galvanized steel, stainless steel or HDPE plastic).

Low-temperature adaptability: Some diesel generators are equipped with heating devices to prevent diesel from solidifying at low temperatures (such as in the Arctic or high-altitude areas).

2.   Advantages

High safety: Diesel has a high Ignition point (about 55℃ or above), Not easy to volatilize, and the fuel tank does not require complex explosion-proof design.

Good economic performance: Diesel has a relatively low price, making it suitable for long-term operation and reducing power generation costs. 

Simple maintenance: The diesel fuel tank has a solid structure, is not easy to be damaged, and has a long service life.

3.   Structure and Constituent components

Box body: Main storage structure, usually made of steel or HDPE plastic, corrosion-resistant.

Oil filling port: Equipped with a filter screen to prevent impurities from entering.

Oil level sensor: Monitors the remaining oil volume to prevent fuel from running out.

Oil outlet pipe: Connects the fuel filter and the engine to ensure clean fuel supply.

Ventilation valve: Balances the internal and external air pressure to prevent vacuum or excessive pressure.

Drain valve: Regularly discharge the accumulated water and impurities.

Anti-overflow device: Prevents fuel from overflowing during refueling.

Heating device: Prevents diesel from solidifying in low-temperature environments.

II.   Application and Advantages of Fuel Tanks in Gasoline Generators

1.   Application features

Lightweight design: Gasoline generators are mostly used in scenarios such as home backup and camping.   Their fuel tanks are relatively small (5L to 200L), making them easy to move.

Anti-evaporation design: Gasoline is volatile, so the fuel tank must be sealed and equipped with an EVAP (Evaporation Emission Control) system.

Fast fuel supply: Gasoline has a high combustion efficiency and is suitable for short-term high-power demands (such as emergency starts).

2.   Advantages

Strong portability: Light in weight, suitable for mobile use (such as outdoor activities, disaster relief).

Fast start: Gasoline has strong volatility and its cold start performance is superior to that of diesel engines.

Lower noise: Gasoline generators are usually quieter than diesel engines.

3.   Structure and Constituent components

Box body: Usually made of plastic (HDPE) or aluminum alloy, with a lightweight design.

Oil filling port: Equipped with a dust cover to prevent impurities from entering.

Oil pump (electric/manual) : Ensures the stable delivery of fuel to the engine.

Fuel filter: Filters impurities and protects the engine.

EVAP system: Reduces gasoline evaporation emissions and complies with environmental protection regulations.

Anti-static design: Prevents fires caused by static sparks.

Safety relief valve: Prevents excessive gasoline vapor pressure.

III.   Summary

Diesel generator fuel tank: Suitable for high-power and long-term operation, with high safety, good economy, simple structure and durability.

Gasoline generator fuel tank: Lightweight, quick to start, suitable for mobile and short-term power supply, but requires anti-volatilization and explosion-proof design.

The reasonable design of the fuel tank directly affects the safety, efficiency and service life of the generator.   Therefore, when choosing a generator, it is necessary to match a suitable fuel tank according to the fuel type, operating environment and power supply requirements.