CYK Compound Centrifugal Chiller

We offer the best high-head performance solution at Johnson Controls with our YORK® CYK Compound Centrifugal Chiller. Designed specifically for high-head conditions and to handle applications with unique differential pressure, standard chillers just can’t compete with our CYK chiller.

The highly adaptable CYK Compound Centrifugal Chiller operates beyond the range of typical centrifugal chillers and incorporates a design using two centrifugal compressors that are arranged in a series to handle air-cooled, brine-chilling, and heat pump applications.

• Superior High-Head Performance – Compound chiller (2 compressors in series) offers superior performance on air-cooled, brine-chilling, ice thermal, and heat-pump applications.
• Greater Adaptability – To best match application requirements, each compressor can be optimized for the operating conditions.
• Superior Off-Design Performance – Capacity control on each compressor enables better performance at off-design conditions than is typical for multistage compressors.
• Lower Inrush Currents and Sound Levels – Multiple compressors mean lower inrush currents during start-up, and lower sound levels during operation.
• Quantum LX Control Center – Offers increased flexibility, superior serviceability, and remote access.
• Performance where standard chillers can’t compete
  The MaxE™ CYK centrifugal chiller incorporates a design
  using two centrifugal compressors arranged in series to
  handle air-cooled, brine-chilling, and heat-pump applications
  at conditions outside the range of typical centrifugal chillers.
  These units use the same technology employed in the renowned
  line of MaxE single-stage centrifugal chillers. Using HFC-134a,
  MaxE CYK chillers are available in a wide range of capacities:
  • For air-cooled applications (air-cooled radiators): 700 to
  2,300 TR at 44°F LWT (2,500 to 8,100 kWR at 7°C LWT)
  • For brine chilling: 700 to 1,600 TR at 20°F LBT (2,500 to
  5,600 kWR at -7°C LBT)
  • For heat pump applications: 11,000 to 38,000 MBH at 155°F
  (maximum output temperature) 3,200 to 11,000 kWR at 68°C
  (maximum output temperature)
  The combination of standard components and unique
  performance characteristics make MaxE CYK chillers the
  technology of choice for jobs where standard chiller designs
  can’t compete. Compound-system technology provides
  energy and performance advantages for utilities, institutions,
  and commercial facilities.
  Understanding high-head applications
  Certain job-site conditions require chillers to operate beyond
  the limits found in typical air-conditioning applications. These
  extreme conditions are characterized by leaving chilled fluid
  temperatures below 36°F (2°C), leaving condensing fluid
  temperatures above 105°F (41°C), or a combination of both.
  When the leaving chilled fluid or leaving condenser fluid
  temperature exceeds standard limits, the lift on the
  compressor increases dramatically. The compressor must
  develop higher differential pressure on the refrigerant gas in
  the compression phase, which results in higher head pressure
• High-head conditions are found in three typical
  cooling applications:
  1) Air-cooled radiators for water chilling in locations that
  lack water for condensing.
  2) Brine chilling for ice-thermal-storage applications and
  for light industrial-refrigeration jobs.
  3) Heat pumps for producing hot water with
  simultaneous chilling.
  High compressor head in brine applications is due to lower
  evaporator temperature and pressure conditions. In heatpump
  and air-cooled-radiator projects, it’s due to very high
  condenser refrigerant temperature and pressure conditions.
  The chiller designed for high-head conditions
  Typical air-conditioning chillers are designed within the limits
  of the available compression ratio of the compressor. These
  limits are quickly exceeded by the unique differential pressures
  encountered in high-head applications.
  The MaxE CYK chiller overcomes these compressor-design
  challenges by using the principle of compounding. A compound
  design arranges two individual compressors in series. By flowing
  the refrigerant gas through two compressors, the pressure ratio
  becomes the sum of the two individual centrifugal compression
  ratios. The result is a much higher total lift pressure available
  to the system, which is able to handle the high head
  demanded by extreme conditions.
  Benefits of compressor compounding
  Standard components: Each MaxE CYK chiller employs
  common parts instead of a one-of-a-kind design. The
  compressors and heat exchangers use standard technology
  proven in the successful MaxE packaged chiller line. Each
  compressor is driven by a standard, open-drive, electric motor.
  Compact footprint: Compressors and motors are mounted above
  the shells to assure the smallest footprint for this type of chiller.
  Greater adaptability: With the MaxE CYK chiller, the impeller
  diameter, width and speed can be optimized for each stage
  of compression based on operating conditions.
• Superior part-load performance: Using a compound
  arrangement allows the use of pre-rotation-vane (PRV) capacity
  control for the centrifugal impellers of both compressors.
  Pre-rotation vanes act like a throttle on the suction side of the
  compressor to control compressor load. With PRV control on
  both compressors, the result is better off-design performance
  than for typical multistage compressors.
  Handles varying condensing conditions: Since chillers spend
  most of their time operating at off-design conditions, off-design
  performance is a major factor in the energy-saving equation.
  A compound chiller can operate with a wider range of
  condensing-water temperatures than typical chillers. The
  MaxE CYK chiller unit allows one compressor to be shut off,
  so the chiller can run on just one compressor during low-head
  conditions. This practice not only ensures system stability, it
  allows the chiller to run more efficiently and takes advantage
  of cooling-water temperatures well below design.
  Lower inrush current: Instead of starting a single, large motor,
  the MaxE CYK chiller stagger-starts the motors in sequence.
  Consequently, peak inrush current is reduced to about 58%
  compared to starting a motor for a single, large compressor.
  Lower sound levels: Acoustically, with compound compressors
  sharing the workload, compressor RPMs are lower than in
  standard centrifugal designs — and lower RPMs help lower
  sound levels.
  Economizer option: An optional economizer is available to
  further improve cycle efficiency for lower energy consumption.
  Built-in reliability
  An on-board control panel simplifies operation by managing
  the staggered-start sequence of the compressors. The colored
  graphical operator interface clearly displays operating
  parameters, setpoints and alarms for quick response.
  MaxE CYK chillers operate with environmentally responsible
  HFC-134a refrigerant with zero ozone-depletion potential,
  which eliminates chiller downtime for retrofit or replacement.
  To further assure reliable performance, each MaxE chiller
  is assembled at the factory. As an option, the unit can be
  run-tested at design conditions prior to shipment.
  For more information on innovative products designed
  specifically for applications that are beyond the operating
  parameters of standard chillers, contact your local Johnson
  Controls representative.

• York (Wuxi) air Conditioning and Refrigeration Co. Ltd, Located in Wuxi National High-tech Industrial Park, Jiangsu province, China. Covers an area of 60000 square meters, of which the heavy machine factory building takes up 14,000 square meters. At present, the company has about 500 staffs, in the field of large-size units. York Wuxi is the largest manufacturer in Asia –pacific region with an annual output of more than 3600 sets. Its products not only top on market share in China, but also see tremendous growth in export in recent years.

   

  York Wuxi has six production lines in total, of which five are automated lines, including one air-cooled screw production line, one large-size water-cooled screw unit production line, one small-size water-cooled screw unit production line, and two centrifugal unit production line. All production line adapt the DFT technology, being the first in the industry. The entire work process is compact and rational. With the efficient management method (such as four-color light), these lines have become the most compact, most efficient and most advanced production line in the industry.

   

  York Wuxi is equipped with globally advance equipment in every step of its production process, including:

  Most advanced plasma digital cutter which can be used under water

  Efficient digital plate bending machine with a roll length up to 4.8 meters

  LINCO DC submerged arc welder imported from USA which is the most advanced equipment in the world.

  Most advanced digital drill press in the industry.

  Four large-sized chiller comprehensive performance test branches, (test capacity per set up to 2000 cold tons, for 10KV high voltage tests and frequency conversion tests), presenting the most advanced level in China.

   

  YORK (CHINA) introduced the Performance Excellence Mode since the beginning of its operation. This mode adopted by most world-class enterprises focuses on the customers. It learns, meets and exceeds the customers’ needs and serves society through its human-oriented strategy and corporate culture. Based on the effective QEHS management system and advanced management tools (e.g. six-sigma).YORK (CHINA) consolidates its leading status in the industry.

  
  

   

  1.   YORK RESEARCH AND DEVELOPMENT

   

  In December 2004, to provide high-quality and competitive air conditioning products and refrigeration equipments to the Asia-Pacific region and on the parts of the world, YORK set up the YORK Asia Pacific research and development center in

  Wuxi.

  The center has the most advanced software systems, highly qualified professionals, and various test equipments and systems. The air-cooled test bench, unique in China and the largest in the

  Asia-Pacific region, which has complete spring base for the equipment vibration test, can lower the noise to 20db by means of muffle devices. It also can carry out the working environment temperature simulation test by changing the indoor temperature via air conditioning and refrigeration system.

  Since its establishment, the R&D center is dedicated to development efficient, energy saving, environment friendly products with independent intellectual property and unique technology and to the research of thermal conductivity, noise vibration and reliability to meet the needs of refrigeration &air conditioning in China and even the entire Asia-Pacific region. At the same time, the R&D center is also working closely with YORK international’s R&D division to develop money advanced products that can meet the global needs, In fact, innovation and renovation of many core technologies are happening in the Wuxi center.

  
  

  2.   YORK SEVICES INTRODUCTION

  York Air Conditioning & Refrigeration Service Centre was established in 1993 in Shanghai. The Service Centre is now having stations in Beijing, Nanjing, Guangzhou, Xiamen, Wuhan and Shenzhen, and service representatives in Shantou, Changsha, Chengdu, Jinan, Dalian, Harbin and Hangzhou, and so on. Using our established service center networks throughout China, we are able to provide full after-sales services to all our customers in China.

  At the same time, the service center is having a bonded spare parts warehouse in Shanghai. The spare parts warehouse will serve the spare part needs for our customers with minimum delivery time.

• Qinhao Zhan

  HVAC&R Engineer

  Refrigeration and Process Systems

  China Refrigeration (York by Johnson Controls)

  Mobile:+86 13818154378  18625150627

  QQ:    826554493

  862417098

   

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