Groupe électrogène de puissance continue à moteur Cummins 4BTA3.9-G11 de 64 kW et 80 kVA

Advanced Control Systems

(UK Deepsea 6120,Smartgen 6120,Comap AMF 25,Deif Brand Etc.. Also Available Base on Customer Need)

• • Integrated automatic voltage regulator (AVR) and digital control panels (e.g., Deepsea, ComAp) for precise monitoring and control.

  • Features such as auto-start/stop, load sharing, and remote monitoring.

Circuit Breaker Specification:

Silent Canopy Photo

Technical Support:

Impact of Water Contamination in Fuel on Diesel Generator Sets and Countermeasures

Abstract: Water mixing into fuel can affect combustion efficiency. As water has a lower boiling point than diesel, it may vaporize under high temperatures, potentially impairing diesel atomization and leading to incomplete combustion. This can result in carbon deposits, reduced engine power, and even white smoke emissions. Therefore, the impact of water in fuel on diesel generator sets is multifaceted, potentially causing insufficient power output, component damage, or even severe malfunctions. Attention should also be paid to potential sources of water in fuel, such as tank condensation, rainwater ingress, or contaminated fuel supply, to facilitate handling and preventive measures.

I. Main Impacts of Water in Fuel

1. Reduced Combustion Efficiency

Water mixed with diesel vaporizes during combustion, disrupting fuel atomization and causing incomplete combustion.

(1) Manifestations: Insufficient power, white smoke (water vapor), increased carbon deposits, higher fuel consumption.

(2) Long-term Consequences: Carbon buildup in the combustion chamber may damage piston rings or cylinder walls.

2. Corrosion of Fuel System

Water can cause corrosion of metal components (e.g., injectors, high-pressure fuel pumps, fuel tanks), especially when sulfur-containing diesel reacts with water to form sulfuric acid, accelerating corrosion.

Damage to Precision Components: Clogged or poorly atomizing fuel injectors, leading to uneven fuel injection or engine stalling.

3. Microbial Growth

The mixture of diesel and water provides an environment for microorganisms (bacteria, fungi) to grow, forming biofilms and acidic metabolites.

Consequences: Clogged fuel filters, corrosion of fuel tanks and lines, fuel turning dark and developing foul odor.

4. Lubrication Failure

Diesel fuel itself lubricates components like the high-pressure fuel pump. Water diluting the fuel reduces its lubricity, causing abnormal wear on parts.

Typical Failures: High-pressure fuel pump seizing, wear on plunger and barrel assemblies, potentially requiring complete replacement in severe cases.

5. Starting Difficulties and Operational Abnormalities

(1) Water freezing at low temperatures may block fuel lines, causing cold start failure.

(2) With excessive water content, the engine may experience intermittent stalling or fail to start.

6. Increased Emission Pollution

Incomplete combustion increases emissions of pollutants like CO and HC, potentially triggering alarms or clogging in emission control systems (e.g., DPF).

Schematic Diagram of Four-Stroke Diesel Engine Working Cycle

II. Countermeasures

1. Preventive Measures

(1) Fuel Quality Control: Ensure procurement of dry fuel; regularly check for water at the bottom of the fuel tank (using transparent sediment bowls).

(2) Tank Management: Maintain tank seals to prevent condensation (consider adding desiccants or periodically draining accumulated water).

(3) Install Water Separators/Filters: Install fuel-water separators; drain manually at regular intervals or opt for automatic draining models.

(4) Use Biocides: Apply specialized diesel biocides to address microbial contamination.

2. Fault Handling

(1) Drain and Flush: Immediately stop using contaminated fuel. Drain the fuel tank and lines, then flush the system with clean diesel.

(2) Replace Filters: Inspect and replace primary and secondary fuel filters to avoid residual contaminants.

(3) Component Inspection/Repair: Dismantle and inspect fuel injectors and high-pressure pumps; remove corrosion or replace worn parts.

(4) System Testing: After repairs, conduct a test run to observe fuel pressure, emissions, and vibration for normalcy.

3. Long-term Maintenance Recommendations

(1) Regular Maintenance Schedule: Inspect the fuel system and clean the tank every 500 operating hours or as specified in the manual.

(2) Environmental Adaptations: In humid regions, shorten filter replacement cycles and consider installing air dryers.

(3) Emergency Preparedness: Store backup fuel in sealed containers; equip with rapid water drainage tools and detection equipment.