Air-Cooled Magnetic Centrifugal Chiller
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Model : UXEV090-UXEV440
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Cooling capacity : 312kW-1549kW
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Oil-free, frictionless compressor
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·Shell and Tube Evaporator
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Standard VFD's
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With AHRI Certification
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Overview
Air-cooled water chiller/heat pump units are the central air conditioning units with air as the cold (hot) source, and water as the heat transfer medium. The units need no additional equipment room, cooling tower, cooling pump, or cooling pipe and can be mounted on the building roof and outdoors. The heat pump units can provide heat as a hot water boiler. This series of units are applicable to various environments, such as hospitals, hotels, factories, and office buildings.
As the designer and manufacturer of large air-cooled heat pump units, DAIKIN has been committed to technical improvement and innovation and leads the development of the air-cooled heat pump technology. For the consideration of environment protection and energy saving, DAIKIN applies the advanced technology to the latest ultra-efficient air-cooled heat pump units. This series of units have a full-load COP. Moreover, DAIKIN has built a large 1900 kW full performance lab to ensure the quality and performance of the units.
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Products Features
Maglev design
The magnetic bearing does not come into contact with the shaft, and mechanical friction is not produced during unit operation, thus substantially reducing the mechanical loss of compressor and improving the energy efficiency of unit, and delivering an Integrated Part Load Value (IPLV) up to 6.049.
Oil-free design
The entire system operates without oil, avoiding thermal resistance formed on the heat exchanger surface after lubricating oil enters the heat exchanger and ensuring higher heat exchange efficiency.
Design of efficient heat exchanger
In comparison with the traditional dry-expansion evaporator, the high efficiency flooded evaporator improves the heat exchange efficiency by more than 30%, enhancing the energy efficiency of unit greatly.
Inverter design
The unit adopts a rare-earth permanent-magnet DC inverter motor, and the permanent magnet has no excitation loss, avoiding copper losses caused when current passes through stator and rotor windings during operation of the common motor, and improving the motor efficiency substantially. The motor's part load efficiency is increased by 25% to 40%, and full load efficiency is increased by 3% to 5%.
High strength material for aeronautical application
The compressor adopts the high strength alloy material for aeronautical application to ensure stability and reliability of the unit at a high speed.
Ultra-low startup current
The low startup current of 2 A avoids current impact and mechanical impact, and guarantees the maximum safety of power grid; the unit implements inverter operation and the compressor realizes stepless regulation and output as needed according to the user's load requirement..
Surge protection of magnetic bearing
When the compressor will stall soon, the stress of magnetic bearing is not uniform, and the feedback signal is sent to the compressor controller to send a stop instruction. The faster response and more precise control enhance the unit reliability.
No oil and no friction
The lubricating oil system does not need to be maintained, and almost all the routine inspection and maintenance items can be omitted to make operations more convenient and easier.
Power failure protection
When the system has a power failure unexpectedly, the DC motor of maglev compressor continues to operate at a high speed due to inertia, the AC induced current generated by the motor is fed back to the power supply IPS, and the IPS converts AC to DC to continue power supply to the magnetic bearing. The motor decelerates to the normal range, the ball bearing ensures continuous safe operation of the motor, and the unit stops smoothly
Low noise operation
The shaft does not come into contact with the bearing due to magnetic levitation during operation of the maglev compressor, and the design without lubricating oil reduces the operation noise greatly by 8 dB(A) in comparison to the common aircooled screw unit.
Free hot water (optional)
The unit provides the heat recovery function for application places with cooling and hot water demands. Waste heat generated during condensation is recycled to prepare hot water, reducing waste heat emission, saving energy and protecting the environment.
Maglev compressor
The compressor has a magnetic bearing and is controlled by the magnetic force during operation. The shaft does not come into contact with the bearing, and the double-stage casting impeller is directly embedded on the shaft, avoiding the capacity loss generated by rotation of the traditional gear. The compressor adopts a permanent magnet motor to realize variable speed operation and achieve output on demand.
Environmentally-friendly refrigerant
The R134a environmentally-friendly refrigerant contains no chlorine atom and poses no harm to the ozone layer. It reduces CO2 emission, mitigates the greenhouse effect and complies with the national low carbon economy requirement
