The lubrication system of traditional chillers not only increases energy consumption but also reduces heat exchange efficiency due to the oil film covering the heat exchange tubes, while also bringing complex oil return issues and maintenance costs. The DMG dynamic air-suspended centrifugal chiller completely overturns the traditional design, using physical principles to achieve rotor suspension operation, eliminating the need for any lubricating oil and fundamentally solving the above problems. Our unit adopts a semi-hermetic two-stage centrifugal compressor, combined with a refrigerant-cooled permanent magnet synchronous motor and a high-precision variable frequency control system, achieving a maximum COP of 6.47, exceeding the national first-class energy efficiency standards across the entire series. Compared with traditional screw chillers, it can reduce overall energy consumption by 20-30%; under partial load conditions, the energy-saving effect is even more significant, and at low loads, the permanent magnet variable frequency system can achieve up to 70% energy savings.
Independently developed dynamic gas bearing technology
Suspension is achieved by the high-pressure air film formed in the bearing wedge gap when the rotor spins at high speed, without the need for an additional air supply or electromagnetic control system. Start-stop life exceeds 100,000 cycles, capable of withstanding extreme conditions such as sudden power outages, with no risk of bearing damage. During operation, the spindle has no contact with the bearing, friction loss is close to zero, and the overall noise is only 75-85dB(A), more than 15dB lower than gear-driven models. Compared with magnetic levitation bearings: the structure is simpler, there is no electromagnetic interference, no risk of sensor damage, and maintenance cost is zero.
High-efficiency falling film evaporator Using a patented liquid distribution design, the refrigerant is evenly sprayed on the surface of the heat exchange tubes forming a thin liquid film, improving evaporation efficiency by more than 20% compared with full-liquid evaporators The refrigerant charge is reduced by more than 40%, lowering initial investment and environmental risks In an oil-free operating environment, there is no oil film thermal resistance on the surface of the heat exchange tubes, maintaining stable heat transfer efficiency over the long term It can achieve a smaller temperature difference for heat transfer, reducing pumping energy consumption for chilled and cooling water
Full Series Technical Parameters
| Model | Cooling Capacity (RT) | Cooling Capacity (KW) | Input Power (KW) | Speed (RPM) | COP | Compressor Quantity | Evaporator Water Flow (m³/h) | Evaporator Pipe Size (DN) | Condenser Water Flow (m³/h) | Condenser Pipe Size (DN) |
|---|---|---|---|---|---|---|---|---|---|---|
| MG-75RT | 75 | 291.9 | 53.9 | 40000 | 5.42 | 1 | 50-90 | 125 | 150 | 125 |
| MG-125RT | 125 | 457 | 75 | 25000 | 6.09 | 1 | 70-100 | 150 | 200 | 150 |
| MG-150RT | 150 | 580.3 | 97.1 | 24500 | 5.98 | 1 | 90-125 | 150 | 300 | 150 |
| MG-200RT | 200 | 887 | 154.3 | 18000 | 5.75 | 1 | 120-135 | 200 | 300 | 200 |
| MG-250RT | 250 | 1022.6 | 174.4 | 17800 | 5.86 | 1 | 120-135 | 200 | 350 | 200 |
| MG-300RT | 300 | 1189 | 196.5 | 17000 | 6.05 | 1 | 135-150 | 200 | 400 | 200 |
| MG-350RT | 350 | 1330 | 212.8 | 17000 | 6.25 | 1 | 150-170 | 250 | 400 | 250 |
| MG-400RT | 400 | 1519 | 256.8 | 13400 | 5.92 | 1 | 170-200 | 250 | 450 | 250 |
| MG-450RT | 450 | 1646 | 274.5 | 13000 | 6 | 1 | 200-220 | 250 | 500 | 250 |
Why Choose DMG Air Bearing Chillers?
A: Extreme Energy Efficiency & Fast Payback: Annual electricity cost savings of 20-30% compared to traditional chillers, typically recouping equipment investment difference within 1-2 years
B:Zero Maintenance Cost: No lubrication system, no regular oil and filter changes, no bearing maintenance requirements, significantly reducing long-term operating costs
C: Ultra-High Reliability: All core components undergo 5 days of continuous factory testing, bearing start-stop life exceeds 100,000 cycles, design service life over 20 years
D: Intelligent Operation Management: Equipped with PLC control system and bilingual (Chinese/English) fault display, supports remote monitoring and intelligent predictive maintenance, real-time bearing vibration monitoring (accuracy 0.1μm)
E: Comprehensive Safety Protection: Built-in multiple protection functions including compressor overheating, overcurrent, high/low pressure, water flow, antifreeze, phase loss and reverse phase, ensuring safe operation under harsh conditions
Environmental Compliance: Uses R134a eco-friendly refrigerant with ODP=0, meeting global environmental regulations
Flexible Adaptability: 10%-100% wide load regulation range, perfectly matching applications with large load fluctuations; IP54 protection rating, suitable for high humidity and other harsh environments
F: . Wide Application Scenarios
Commercial Buildings: Central air conditioning systems for office buildings, hotels, shopping malls, hospitals and data centers
Industrial Manufacturing: Process cooling for electronics & semiconductors, precision machinery, pharmaceutical & chemical, food & beverage industries
Other Fields: Laboratories, testing centers, large venues and rail transit refrigeration needs
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