Diesel Generator sets, as the core power supply equipment for field engineering, mining areas, shipping, and commercial plant areas, rely on
Diesel Engines to drive generators for independent power supply. There are many types of
Generator sets on the market, which are divided into multiple categories according to their operating purposes, power ranges, cooling structures, and protective forms. Many purchasers only compare price and nominal power when selecting models, confusing common power with backup power, ignoring usage environment and load characteristics, resulting in problems such as insufficient power, high
Fuel consumption, and premature equipment wear and tear. This article combines the application experience of FARIZON
Diesel Engine matching sets to sort out the differentiation standards and selection methods of different diesel generator sets, helping users accurately match models.
1、 Distinguishing operational attributes: common units and backup emergency units
The first step in selection is to clarify whether the unit is providing long-term continuous power or short-term emergency power. The internal structure calibration standards for the two engine models are completely different.
Common (main PRP) generator set: suitable for areas without stable power grids, as a continuous main power source, such as mines, field construction sites, remote mining areas, and island projects. The model supports long-term operation throughout the year, allowing stable operation at 70% -80% load for a long time, and has a short-term overload capacity of 10% for 1 hour every 12 hours. The supporting engine strengthens continuous working condition heat dissipation and wear-resistant components, focusing on long-term operational stability and fuel economy. It is strictly prohibited to use backup units as the main power source for a long time, otherwise it will exacerbate carbon deposition and shorten the overhaul cycle.
Backup (emergency ESP) generator set: commonly used for emergency power supply in factory areas, hospitals, and data centers after power outages. It is usually on standby for a long time and has a cumulative operating time of less than 200 hours per year, with only short-term load. This model is not suitable for continuous full load operation and is suitable for fire protection systems, emergency lighting, and critical equipment power-off protection scenarios.
2、 Reasonably calculate power and avoid core selection misconceptions
Power matching is of utmost importance in the selection of generator sets, and it is also the easiest step to fall into. Firstly, distinguish between kW (active power) and kVA (apparent power). The industry standard power factor is 0.8 and cannot be directly confused for conversion. Calculate the total power of all synchronous starting devices on site, while fully considering the huge starting impulse current of inductive loads such as motors and pumps. It is recommended to reserve 20% to 30% power margin for selection. High altitude and high temperature environments require power correction: when the altitude exceeds 1000 meters and the ambient temperature is above 40 ℃, thin air will cause a natural decrease in engine output power. It is necessary to increase the power specification of the unit or choose a high-altitude enhanced diesel engine. At the same time, be wary of the common trap in the industry: some manufacturers directly label backup power as common power. In long-term outdoor work scenarios, it is necessary to confirm that the main power is indicated on the model nameplate.
3、 Select cooling and protection forms based on environmental conditions
Diesel generator sets are divided into two mainstream structures: water-cooled and air-cooled, which are suitable for completely different usage scenarios. Water cooled generator sets rely on coolant circulation for heat dissipation, stable temperature control, and lower noise. This solution is commonly used in high-power units and is suitable for factory rooms and long-term continuous operation projects. FARIZON water-cooled diesel engines have a comprehensive thermal management system and minimal temperature fluctuations under continuous high load conditions, making them suitable for industrial fixed power stations. The air-cooled generator set has a simple structure, does not require antifreeze or pipelines, and is easy to maintain. It is suitable for water scarce areas and small mobile units, and is often used in small temporary projects. Disadvantages: Long term full load heat dissipation capacity is limited, and it is not recommended to use it under high-power continuous working conditions.
From the perspective of protective appearance, it also includes open frame type, soundproof speaker type, and rainproof trailer mobile type. Residential and urban construction sites should prioritize the use of soundproof speaker units to reduce noise; Outdoor work without obstruction, choose rainproof protection models; Frequent transition construction is required, and a trailer mobile power station can be optionally selected.
4、 Match engine control configuration according to load type
There are significant differences in the requirements for voltage stability and waveform quality of generator sets under different electrical loads. Ordinary lighting and resistive loads can be met by basic standard models; Power loads such as electric motors and air compressors have strict requirements for voltage drop. It is recommended to pair them with generator sets with excellent voltage regulation performance; For power supply of precision instruments and communication equipment, priority should be given to models with permanent magnet excitation and multiple voltage stabilization protection. Automated configuration optional: The unmanned computer room can be equipped with ATS automatic switching module and remote monitoring system. It automatically starts when the mains power is cut off and stops when the mains power is restored. It also supports remote viewing of oil pressure, water temperature, and fault alarm information.
5、 Long term operational perspective: engine reliability and maintenance system
The core power source of the generator set is the diesel engine, and the overall service life and maintenance cost depend on the quality of the engine. For sustained high-intensity operating conditions, industrial grade diesel engines with reinforced crankshafts and turbocharged intercooled designs are preferred. The FARIZON series diesel engines are specially tuned for the working conditions of the generator set, optimizing idle stability, reducing the risk of low load carbon deposits, and adapting to the intermittent and variable load operating characteristics of the generator set. At the same time, procurement needs to consider the supply of accessories and global after-sales network, especially for overseas engineering and cross-border projects. Choosing a power brand with a standardized spare parts system can reduce the loss of downtime waiting for maintenance.
Summary
The selection of diesel generator sets follows a clear logic: distinguishing between primary and backup operating conditions → accurately calculating load power → selecting cooling structures based on the environment → matching loads to determine electronic control configurations. Long term construction without power grid in the field, using water-cooled main units; Select backup units for emergency power supply in buildings and businesses; Water shortage and short-term temporary operations can choose air-cooled models. Reasonable selection not only ensures stable power supply, but also reduces fuel consumption and extends the overhaul cycle of diesel engines. FARIZON can provide multi power range diesel engine power matching solutions, providing customized generator set power solutions for industrial power stations, engineering mobile power sources, and overseas projects.
