Magnetic bearing refrigeration refers to the use of magnetic levitation technology in centrifugal chillers, which reduces mechanical losses and makes cooling operation more efficient and energy-saving. Compared with conventional variable frequency centrifugal chillers, the key difference lies in the magnetic bearing centrifugal compressor.

A magnetic bearing system consists of a rotor, sensors, controller, and actuators. The actuators include electromagnets and power amplifiers. A magnetic bearing is a lubrication system that uses magnetic fields to suspend the rotor, allowing rotation without mechanical contact, mechanical friction, or conventional bearings. In a magnetic bearing centrifugal chiller, the impeller rotates without mechanical contact, eliminating mechanical wear, the need for mechanical bearings, and lubrication systems.

Advantages of Magnetic Bearing Centrifugal Chillers

The advantages of a magnetic bearing variable frequency centrifugal chiller mainly come from the magnetic bearing centrifugal compressor. Traditional centrifugal compressors are driven by motors and supported by conventional bearings, while magnetic bearing compressors are driven by permanent magnet motors. This working principle provides significant benefits:

1. Energy Saving – At partial load operation, peak COP efficiency can reach up to 12. According to HVAC system statistics, annual energy savings compared to conventional chillers can be as high as 35%.

2. Low Maintenance Cost – Fewer moving parts and no complex oil system, oil cooler, or oil filters. No need for yearly compressor cleaning—only evaporator and condenser cleaning is required, reducing costs and saving time.

3. Low Noise and Vibration – With no mechanical friction and an air cushion damping system, vibration and noise are extremely low. Compressor noise is below 77 dB, eliminating the need for vibration isolators, springs, or soundproof rooms.

4. No Friction Loss – No mechanical bearings or gears, no lubrication oil circulation. The system runs on pure refrigerant compression. Friction losses are only about 2% compared to conventional centrifugal bearings.

5. Low Starting Current – Traditional screw chillers require large starting currents (200A–600A), affecting power grid stability. Magnetic bearing chillers adopt variable frequency soft start, reducing starting current to as low as 6A, minimizing grid impact and eliminating the need for special electrical protection.

6. Sustainability and Long-Term Efficiency – Conventional oil-bearing chillers lose up to 25% efficiency due to oil residue accumulation over time. Magnetic bearing chillers operate completely oil-free, ensuring stable performance without efficiency loss even after years of operation.

7. Green and Environmentally Friendly – Uses eco-friendly refrigerant R134a, with zero ozone depletion potential (ODP = 0). As a positive pressure refrigerant, it avoids system contamination risks.

8. Anti-Surge Protection – The compressor control module provides real-time monitoring, adjusting speed to keep the compressor operating safely within the designed curve, preventing surge and ensuring reliability.

Jinan Darko Chiller Company is a top-rated enterprise that will be standing first to meet your cooling needs by offering a reliable working cooling equipment.

There is no need to waste your time searching when the best option is already available. Make sure to fix a meeting with our sales staff for your deep satisfaction then confirm your order.

In order to save your time, you can send us the follows information when you contact with us:

1. What's the cooling capacity need? can use Kw, tons, or Kcal/h.

2. If you can't make sure the capacity, may I know what's the water flow in your system?

3. What's the inlet and outlet temperature need?

So that we can calculate and make and suitable chiller proposal for you.