Silent Diesel Generator Set | Fixed & Mobile Low-Noise Power Solutions
What is a silent box type diesel generator
A silent diesel generator set, also known as a low-noise generator set or soundproof generator set, is a specialized power generation unit built upon standard diesel generators. It incorporates high-performance soundproof enclosures, optimized air intake and exhaust systems, high-density acoustic insulation materials, and vibration-damping structures to reduce operating noise to levels compliant with environmental standards.
Name diagram of each component of the soundproof box diesel generator set
Introduce you to the external structure of a soundproof speaker
A. control panel
used for turning on or off, or observing the operation status of the unit by viewing the technical parameters displayed on the panel;
B.Cable interface
used to connect the output cable of the generator, usually a three-phase four wire interface
C.Cable interface
Double door, open when maintenance or repair is needed
D.Exhaust port
used to dissipate heat from the diesel generator and connect to the water tank position of the generator set
E.Bottom fuel tank
With full load operation, the fuel tank capacity can reach 8 hours of use
Specifically explain the functions of each component of the silent diesel generator
control panel
External control panel, using high-end deep-sea intelligent control modules for easy operation
Control cabinet
Install relays, air switches, etc. under the control cabinet to facilitate the connection of cables and signal lines
Soundproofing cotton
Using exclusive patented soundproof cotton installation technology, the noise of the diesel generator set is minimized
Emergency stop
Specially designed taboo shutdown device, convenient for one click shutdown in emergency situations
Refueling port
The bottom of the soundproof speaker is equipped with an 8-hour fuel tank, which improves the portability of refueling the diesel generator
Cable channel
Independent cable installation channels make the unit look neat and beautiful
Air inlet
Patented exhaust technology that can smoothly dissipate the heat from diesel generators while reducing noise
Top smoke exhaust pipe
Install a smoke exhaust pipe on the top of the soundproof speaker to ensure smooth smoke exhaust and reduce the temperature inside the chassis
Comparison: Silent Diesel Generator vs. Standard Diesel Generator
| Aspect | Silent Diesel Generator | Standard Diesel Generator |
|---|---|---|
| Noise Level | ≤73 dB @ 7m (55–75 dB) | 85–100 dB @ 7m |
| Installation | Outdoor direct installation, no engine room required | Requires dedicated engine room or soundproof building |
| Enclosure | Soundproof canopy with rain/dust protection (IP54) | Open frame, no protection |
| Fuel Tank | Integrated base fuel tank (8–12 hours runtime) | External or separate tank required |
| Mobility | Fixed or mobile (trailer-mounted) options available | Typically fixed installation |
| Space Requirement | Compact, saves construction cost | Requires larger space for engine room |
| Maintenance | Access doors for easy routine service | Full access, but requires indoor space |
| Best For | Residential areas, hospitals, hotels, data centers, schools | Industrial plants, remote sites, areas with no noise restrictions |
| Cost | 20–40% higher than standard | Lower initial cost, but plus engine room construction |
How Silent Generator Sets Achieve Ultra-Low Noise Operation
The noise reduction performance of a silent diesel generator set is achieved through a systematic combination of multiple noise control technologies, rather than a single measure. The core technologies are described below:
High-Density Acoustic Insulation Materials
The inner walls of the soundproof enclosure are lined with multi-layer composite acoustic materials such as high-density acoustic foam, soundproof felt, and micro-perforated aluminum panels. These materials provide targeted absorption and isolation for different frequency bands (low, mid, and high) generated by the diesel engine, effectively blocking mechanical noise transmission.
Optimized Air Intake and Exhaust System
Silent generator sets utilize labyrinth-style air intake channels and forced exhaust designs. While ensuring sufficient cooling airflow, these designs significantly reduce airflow noise through air path redirection and baffle arrangements. High-efficiency silencers are installed at the exhaust outlets to further attenuate exhaust noise.
Engine and Exhaust System Noise Reduction
Industrial-grade heavy-duty silencers (two-stage or three-stage) reduce exhaust pulse noise.
High-elasticity vibration isolators between the engine and base frame prevent structural sound transmission.
Flexible bellows connect exhaust pipes to minimize vibration transfer.
Soundproof Enclosure Structure
The enclosure features a double-layer steel panel structure with fire-retardant acoustic insulation material in between, forming an effective sound barrier. Door panels and access covers are equipped with sealing gaskets to eliminate sound leakage. The enclosure design also accounts for heat dissipation, ensuring stable operation under high-temperature conditions.
Sound Pressure Level Control Standards
Depending on power rating and configuration, the operating noise of silent generator sets is typically controlled within the following ranges:
20–100 kVA: 55–65 dB(A) @ 7 meters
100–500 kVA: 65–72 dB(A) @ 7 meters
Above 500 kVA: 72–78 dB(A) @ 7 meters
Industry Standards and Certifications
Industry Standards and Certifications for Silent Diesel Generator Sets
| Standard Category | Standard Reference | Scope |
|---|---|---|
| Noise Testing | ISO 8528-10 | Reciprocating internal combustion engine driven alternating current generating sets – Part 10: Measurement of airborne noise by the enveloping surface method |
| Environmental Noise | GB 3096-2008 | Urban Area Environmental Noise Standard (China) |
| Emission Standards | GB 20891-2014 / EU Stage V / EPA Tier 4 | Emission limits for diesel engines used in non-road mobile machinery |
| Safety Requirements | GB/T 2820 / ISO 8528 | Safety requirements for reciprocating internal combustion engine driven alternating current generating sets |
| Ingress Protection | IEC 60529 | Degrees of protection provided by enclosures (IP Code) |
download Silent generator set Specification data
Fixed static speakers&mobile low-noise speakers&rain covers suitable for various brands of diesel generator sets, size and weight parameters download
30kw-1200kw (37.5kva-1500kva) fixed type Silent generator set size and weight
30kw-1000kw (37.5kva-1250kva) Mobile silent generator set size and weight
Size and weight of rain cover for 30kw-1200kw (37.5kva-1500kva) diesel generators
