7 Key Knowledge Points to Understand Diesel Generator Sets

I. Impact of Environmental Factors on Unit Operation

Diesel generator sets are susceptible to interference from various external factors when operating in different climatic environments:  

• Rainwater, dust, and sand can cause wear and blockage of equipment components;  
• Saltwater mist in coastal environments and air containing corrosive gases such as sulfur dioxide may lead to rusting of metal parts and degradation of insulation performance of the unit.  

Targeted protective measures are required.  

II. Core Composition and Auxiliary Components of the Unit

1. Core Components

Diesel engine, generator, and controller work together to realize the conversion and stable output of mechanical energy to electrical energy.  

2. Auxiliary Components

Including base, base fuel tank, radiator, water tank, anti-recoil pad, soundproof cover, muffler, silent box, etc. These components respectively undertake functions such as fixed support, fuel storage, heat dissipation and cooling, shock absorption and noise reduction, ensuring the overall operational stability and adaptability of the unit.  

III. Specifications Related to Noise Levels

Noise levels have a significant impact on the operating environment and human health. The specific standards are as follows:  

• 30–40 decibels (dB): Ideal quiet environment, suitable for daily rest and precision operation scenarios;  
• Above 50 dB: Interferes with sleep and rest quality, requiring basic noise reduction measures;  
• Above 70 dB: Affects normal conversation and communication, reduces work efficiency, requiring enhanced noise reduction treatment;  
• Above 90 dB: Long-term exposure can cause hearing damage, leading to health problems such as neurasthenia, headaches, and increased blood pressure. It is necessary to strictly control the usage time and equip professional protective equipment;  
• 150 dB and above: Sudden exposure can cause acute trauma to the auditory organs, possibly leading to tympanic membrane rupture and bilateral deafness. Unprotected operation of the unit is strictly prohibited in such environments.  

To ensure safety and comfort during use, it is recommended:  

• Noise should not exceed 90 dB in scenarios requiring hearing protection;  
• Noise should not exceed 70 dB in work and study scenarios;  
• Noise should not exceed 50 dB in rest and sleep scenarios.  

IV. Core Purposes of Parallel Operation

1. Expand Power Supply Capacity

By paralleling multiple units, the total power supply can be flexibly increased according to actual electricity demand, adapting to large-scale power consumption scenarios.  

2. Improve Power Supply Reliability

Achieve uninterrupted power supply. When a single unit malfunctions or requires maintenance, other units can seamlessly take over, avoiding losses caused by power outages.  

V. Calculation Method for Fuel Consumption

The formula for calculating fuel consumption (unit: L/h) is as follows:  

Fuel Consumption (L/h) = Diesel Engine Rated Power (kW) × Fuel Consumption Rate (g/kWh) ÷ 1000 ÷ 0.84  

Note: The density of 0# diesel in the formula is 0.84 kg/L. In actual calculation, adjustments should be made according to the standard density corresponding to the diesel model to ensure accurate results.  

VI. Hazards of Long-Term Overloading

During the operation of the unit, overloading is generally not allowed, and only short-term slight overloading can be tolerated. If the overloading time is too long (exceeding the rated power range), the following problems may occur:  

• Overheating of the cooling system, resulting in failure of unit heat dissipation;  
• Overheating of the generator windings, affecting insulation performance and potentially causing short-circuit faults in severe cases;  
• Decomposition of lubricating oil concentration, leading to low oil pressure and increased component wear;  
• Significant reduction in the overall service life of the unit, increasing the frequency and cost of maintenance.  

VII. Usage and Protection Measures in Special Environments

1. Protection for High-Energy Storage Batteries

When the unit adopts high-energy storage batteries, emphasis should be placed on thermal insulation protection:  

• If the room temperature may drop below 0°C, a battery heater should be equipped to maintain battery capacity and output power;  
• If the unit operates in a high-humidity environment, heaters should be installed in the generator windings and control box to prevent short circuits or insulation damage caused by condensation.  

• Protection for Operation in Extremely Cold Climates

In low-temperature environments, fuel heaters or electric heaters should be used to preheat the cooling water, fuel, and lubricating oil of the cold engine to ensure the overall temperature rise of the engine and smooth startup;  

When the room temperature is not lower than 4°C, a coolant heater should be installed to maintain the engine block temperature above 32°C, avoiding damage to components caused by low temperatures.  

• Selection of Lubricating Oil for Low-Temperature Environments

Use special low-temperature lubricating oil to reduce oil viscosity, improve fluidity, and reduce internal friction resistance of the liquid. This ensures sufficient lubrication of all engine components and avoids faults caused by poor lubrication at low temperatures.  

• Precautions for Use in Plateau Areas

When the engine supporting the unit (especially naturally aspirated engines) is used in plateau areas, the thin air leads to insufficient fuel combustion, resulting in power loss. Generally, for every 300m increase in altitude, the power loss is about 3%.  

Therefore, when using in plateau areas, the operating power of the unit should be reduced to avoid smoke emission and excessive fuel consumption, ensuring stable operation of the unit.