turbocor compressor
TRANSCRIPT
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STUDY ON TURBOCOR COMPRESSOR
PRASANTH.M M.E THERMAL ENGG
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CONTENT
• INTRODUCTION
• DESCRIPTION
• ADVANTAGES
• APPLICATIONS
• CONCLUSION
• REFERENCE
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INTRODUCTION
• Oil free compressor
• Specifically designed for HVAC-R industry
• This technology includes magnetic bearings,
variable speed centrifugal compressor and digital
electronic controls
• Enable to achieve highest overall efficiency
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OIL COMPRESSOR OIL FREE COMPRESSOR
Energy loss due to lubrication Saves energy
High start up current Low start up current
Reduced COP Increased COP
No digital control Full digital control
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DESCRIPTION
Source :Danfoss5
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Source : DANFOSS
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MAGNETIC BEARING
Source : DANFOSS
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MAGNETIC BEARINGS
Source : DANFOSS
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CROSS-SECTION OF AXIAL BEARING AND RADIAL BEARING
Source :Danfoss Turbocor Compressors
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MAGNETIC BEARINGS AND BEARING SENSORS
• Composed of both permanent and electromagnets with a
unique, patented design for compact size and reliable high
performance
• Enables precisely controlled frictionless compressor shaft
rotation on a levitated magnetic cushion
• Bearing sensors, located at each magnetic bearing, feed
back rotor orbit and thrust/axial information in real time to
the bearing controller
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• Powered by PWM (pulse width modulated)
voltage supply
• High-speed variable frequency operation affords
high efficiency, compactness and soft start benefits
PERMANENT-MAGNET SYNCHRONOUS MOTOR
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• Radially and axially located bearings support the rotor when
the compressor is not energized
• Provides backup, preventing contact between rotor/impeller
assembly and other metal surfaces
TOUCHDOWN BEARINGS
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• Only one major moving compressor component
• Acts as rotor for permanent-magnet synchronous
motor
• Impellers are keyed directly to the shaft
SHAFT AND IMPELLERS
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• IGBT (Insulated Gate Bipolar Transistor) is an inverter that
converts a DC voltage into an adjustable three-phase AC
voltage
• Signals from the motor/bearing controller determine the
inverter output frequency, voltage and phase, thereby
regulating the motor speed
• In case of power failure, this patented control scheme
allows for a normal de-levitation and shutdown
VARIABLE FREQUENCY DRIVE
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• Significantly reduces high in-rush current at start-
up, providing advantages to line power systems and
reducing thermal stress on the stator
• The start-up in-rush current is only 2 amps vs.
typically up to 250-350 amps experienced by
conventional compressors in this tonnage range —
truly redefining soft starts
SOFT START MODULE
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• Single point connection to primary power supply
• Rectifier converts AC line power into a high voltage DC power
source
Capacitors for smooth DC voltage supply
• DC-DC converters for supply and isolation of high and low DC
voltages
• Network connection for external control and monitoring
• PWM amplifier for power to electromagnetic bearings
• Compressor bearing and motor controller microprocessor
ELECTRONIC PACKAGE
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CONTROL SYSTEMS
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Source : DANFOSS
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MOTOR
Source : DANFOSS
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Source : DANFOSS 19
PERFORMANCE COMPARISON
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ADVANTAGES
• Noise Level Is Less Than 72db
• Frictionless Compressor
• Small Foot Print
• Smaller Size
• Less Vibration
• Energy Efficient
• Reliability
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APPLICATION
• Industrial Facilities
• Schools
• Hotels
• Office buildings
• Hospitals
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REFERENCE
• Danfoss Turbocor Compressor Inc
• Danfoss
http://refrigerationandairconditioning.danfoss.in
• Turbocor® Compressor Retrofit of a 260 Ton Screw
Chiller for Seattle-Based Hi-Tech Company