What is the difference between a magnetic levitation chiller and a conventional chiller

Update:31 May 2019
Summary:

The magnetic levitation chiller realizes the suspension […]

The magnetic levitation chiller realizes the suspension operation of the motor shaft and the impeller during the rotation process through the digitally controlled magnetic levitation bearing system, completely eliminating the friction between metal and metal. The mechanical friction of the whole unit is only 0.2% of the traditional chiller, which greatly prolongs the service life. This is an important aspect of the magnetic levitation chiller that is different from the traditional chiller. What is the difference between the two? The following is a small series for you to explain.

1, the principle is different: the traditional refrigeration compressor, mechanical bearings are necessary components, and there must be a lubricating oil circulation system to ensure the mechanical bearing work. The magnetic levitation chiller is a kind of magnetic field that suspends the rotor in the air, and does not generate mechanical contact friction when rotating. Therefore, the magnetic suspension bearing no longer needs the lubrication system necessary for the mechanical bearing and the mechanical bearing.
 2, the redundancy function of the cooling system: the redundancy function of the cooling system is very important, but often due to space limitations and cost constraints, traditional refrigeration compressors can not install multiple compressors in one machine to achieve cooling system redundancy Remaining function. The magnetic levitation chiller is a multi-magnetic suspension compressor installed in a common unit to achieve redundancy. If a single compressor fails, the other compressors can still operate normally.

3. Operation efficiency: The magnetic levitation chiller is 30% more efficient than the compressor of the traditional unit, and the mechanical friction is only 0.2% of the traditional unit. The adaptive control in the automatic control system allows a 450 ton chiller to provide the lowest cooling capacity. 0.33 kW / ton, cooling time up to 40-50h. This powerful adaptive control logic meets all-day cooling needs and requires no special setup.

4. The starting current is different: the cooling capacity of the compressor of the traditional refrigeration unit needs at least 500-600A starting current, while the single compressor of the magnetic levitation air conditioning unit only has 2A flexible starting current, no need for soft starter, saving about several hundred thousand yuan of pressure. At the same time as the equipment is put into operation, there is no impact on the grid.

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