southwestmechanical

Specialized Services

Tempe Tech_700 T Air Cooled_Install

Southwest Mechanical Services offers several highly-specialized repair & retrofit services.  These services require unique equipment and/or specialized expertise.

 

Air & Water Balancing

Tempe Tech_700 T Air Cooled_InstallAir & water testing, adjusting, and balancing services are designed to provide comfortable and efficient operation of air and hydronic systems for new and existing facilities.  Establishing and maintaining proper systems operation ensures:

  • Maximum System Efficiency with Minimized Operating Costs
  • Design Specifications are Met
  • Elimination of Possible Design or Construction Deficiencies
  • Troubleshooting and Repair of Problem Areas

Industrial HVAC – Manufacturing Applications

Southwest’s Technicians have a seasoned knowledge of Industrial HVAC applications and Process Chiller systems.  Capable of complex HVAC solutions or complete system retrofits, the Southwest team is uniquely equipped to tackle Industrial and Manufacturing HVAC challenges.

Cooling Tower Refurbishment

Over the years of operation, cooling towers lose their efficiency which increases the stress to the other components of the cooling system.  Through proper maintenance programs and routine service work, customers can minimize this loss of capacity and extend the life of the cooling tower.  A refurbishment can repair a cooling tower to its original operating condition and extend its useful life with minimal downtime. Tower rebuilding and fill replacement can extend the useful life of a tower about 10 years at about half the cost of a new replacement with these additional benefits:

  • Reduced Maintenance Costs
  • Reduced Energy Costs
  • Reduced Water Consumption
  • Enhanced Thermal Efficiency
  • Original Brand Components or Custom Fabrication
  • On-Site Dismantling and Disposal

Turbocor/ Magnetic Bearing Compressor Retrofit

Magnetic bearing compressors operate more efficiently than typical centrifugal and screw compressors, especially during partial load conditions. The magnetic bearings allow the compressor to operate without the use of oil for lubrication, which reduces energy losses due to friction and increases the heat transfer efficiency of the chiller.

 Turbocor Retrofit Highlights

  • Quiet operation.
  • Oil-free design.
  • Light-weight equipment (200# versus 1,200#) – allows for faster installation.
  • Low power start-up (2 Amps versus 700+ Amps) – reduce peak and capacity power requirements.
  • Reduced maintenance costs.
  • Energy savings typically range between 30-40%.
  • Utility rebates available to subsidize retrofit costs.
  • Eliminate acid contamination risk.

In addition to energy savings, magnetic bearing compressors feature many benefits developed through extensive R&D by Turbocor.

Tempe Tech_1100 T Water Cooled Chiller_Removal CroppedTurbocor began research and development on a new compressor in 1993.  The design goals for developing a centrifugal compressor included lubricant free operation and a direct drive system.  One hundred fifty million dollars was invested in R&D of this compressor, the result of that investment is an oil‐free compressor that has magnetic bearings, and a direct drive system with no gears.  Additional benefits include a light weight design (80% less than traditional compressors) reduced noise and vibration and only one moving part.  By 2001, beta test sites proved the compressor design was viable for market introduction.

The compressor’s rotor, permanently magnetized shaft and impellers levitate during compression and float on a magnetic cushion.  Two radial and one axial magnetic bearing are employed. The compressor has an integrated variable frequency drive (VFD).  VFDs provide the best part load efficiency and operate most effectively with centrifugal compression.  The speed of the compressor adjusts to changes in load and/or condenser water temperature.

The minimum load on the compressor is 15%.  The auto balance feature checks and repositions the magnetic bearing six million times a minute to maintain centered rotation at all times.  It uses 1.6 amps to start up (elevate the shaft) and operates at 16,000 to 40,000 RPMs.  The motor is a permanent magnet brushless DC motor and the motor, electronics, and VFD is refrigerant cooled.  The compressor is designed to handle a power outage.  The motor becomes a generator; after the compressor comes to a complete stop the rotor de‐levitates normally onto touchdown bearings.

 

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Chilled Water Systems & Solutions

In a chilled-water system a large or multiple compressors are installed in a central location.  The compressors provides cooling to a medium such as water, the water is cooled to between 40 and 45 degrees Fahrenheit.  The chilled water is then piped throughout the building and connected to air handlers.  The warm air in the building is transferred to the water which is cooled again by the compressors and recirculates back to the air handlers to repeat the process.

Compressor Services: Centrifugal, Screw, & Reciprocating

  • Inspection
  • Rebuild
  • Retrofit & Replacement
  • Heat Exchanger Re-tubing
  • Microprocessor Upgrades
  • High Efficiency Refrigerated Purge Systems
  • Eddy Current Non-destructive Testing
  • Low-loss Rupture Disk Upgrades
  • Laser Alignment Services
  • Modernization & Modification of Existing Equipment

 

 Cascade Refrigeration

Cascade refrigeration has two or more stages of refrigeration (i.e. two or more cycles) which operate in series.  These refrigeration cycles are called cascade refrigeration cycles.  Typically cascade systems are employed to obtain high temperature differentials between the heat source and heat sink and are applied for ultra-low temperatures ranging from -70°C to -100°C.  Today cascade refrigeration is being utilized in laboratory testing equipment such as chip manufacturers.

Practical Applications

  • Thermal Stream Temperature Forcing Units
  • Glycol Lab Chillers
  • Process Chillers
  • Ice Banks

Bearing & Vibration Analysis | Shock Pulse Method

Vibration produced by rolling bearings can result from geometrical imperfections during the manufacturing process, defects on the rolling surfaces or geometrical errors in associated components.  The Technicians at Southwest Mechanical Services utilize Shock Pulse Technology.  This proactive approach to maintenance is designed to minimize downtime and reduce catastrophic equipment failures.  The Shock Pulse Method will:

  • Analyze anti-friction bearing condition to discern the severity of bearing damage.
  • Detect installation faults such as soft foot.
  • Measure lubrication film thickness.
  • Assist in detecting when failure may occur.
  • Utilize for continuous (real time) machinery condition monitoring.

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Specialized Services