Abbott, a pharmaceutical and healthcare producer, is operating an ammonia-based system to help cool produce at its manufacturing site in Arizona. The cooling system is used to produce a range of products including infant formula and adult medical nutritional produce.
Heat transfer fluid – for chillers and indirect system Glycol, water, pumped ammonia
Possible temperature range MT: -25°C – +12°C
Possible temperature range LT: -35°C – -25°C
Cooling capacity (kW): 900 – Water/glycol -10°C/-5°C, screw compressor, environment air temperature 35°C
Type of chiller compressor: Screw
Heat transfer fluid: Glycol, water
Possible temperature range MT: -35°C – -10°C
Possible temperature range LT: -35°C – -25°C
Cooling capacity (kW): 750 for water/glycol -5°C/-10°C and ambient air temperature 35°C
Alaska-based Denali Brewing and Spirits has completed the commissioning, site training and startup of its PROGreen CO2 (R744) chiller from U.S. manufacturer Pro Refrigeration; it is one of the first CO2 process cooling chillers installed in the U.S.
Plans for the installation at the brewery were first announced in May, following a year of research, development and engineering. The installation was done by Pro Refrigeration and Denali’s service contractor, Arctic Refrigeration. Additional remote support was provided by South African consultancy Future Green Now (FGN).
Pro Refrigeration’s 100 HP PROGreen CO2 chiller replaces Denali’s HFC-blend-based 40HP PROChiller System, also from Pro Refrigeration, which was installed in 2013.
This system provides up to 1,000,000 BTU/HR cooling capacity to support Denali Brewing Company’s new product line while also making use of onboard heat recovery to support the distillery’s building and water heating needs.
Type of chiller compressor: Semi-hermetic screw
Heat transfer fluid: Glycol, Propylene Glycol
Possible temperature range MT: -15°C – 0°C
Possible temperature range LT: -30°C – -15°C
Cooling capacity (kW): 362.9 under nominal conditions for medium temperature: Ambient temperature 35°C with glycol inlet/ outlet at -2/-8°C, with a propylene glycol concentration of 35°C
Unit price (in USD): 100,000 – 300,000
Training availability: Physical and online
Notes: Direct R-717 condensation, semi-hermetic screw compressor, VSD permanent magnet motor, EC fans, heat recovery
In January 2015, the first ice rink running on a CO2 transcritical system in the U.S.A. was opened in Anchorage, Alaska. The system is expected to generate the company energy savings of 25-40% and significantly reduce the total spent on refrigerant.
Possible temperature range MT: -5°C – -10°C
Possible temperature range LT: -15°C – -20°C
Cooling capacity (kW): 417-600 – Capacity range for MT (-5°C – -10°C)
Beginning in 2002, the British supermarket chain ASDA had Star Refrigeration replace all refrigeration units that use the hydrochlorofluorocarbon (HCFC) R-22 at its distribution centres as part of a long-term modernization program. Star Refrigeration designed an ammonia/CO2 cascade system. At one of ASDA’s major distribution centers in Lutterworth, UK, the refrigeration system provides efficient refrigeration for the 270,000 m³ premises. Areas requiring refrigeration are: a frozen food cold store at -25°C and several chill rooms at temperatures between 1°C and 13°C. The chill rooms are cooled with carbon dioxide as a volatile secondary refrigerant.
Axima Refrigeration has developed an advanced ammonia cooling system for the Belgian Ice cream Group (BIG). BIG, as an ice cream manufacturer, is part of an industry that relies on superior cooling. Following pasteurization and homogenization, a mixture of cream, sugar and other ingredients is frozen and beaten up to ice cream in continuous freezers. The finished products, from cones and desserts to sorbets are sent to ducts for ultra fast freezing, after which they are packed. They are then placed in freezer storage (over 90,000 m²) at a constant temperature of -30°C. Axima Refrigeration was the first in Belgium to use a Powerdrive frequency converter with a permanent magnet synchronous motor during the installation of a new screw compressor at BIG, giving 10% better energy efficiency.
CO2 refrigerant is being used to provide cooling at Bergen Harbour’s Ship Terminal in Norway, previously cooled by an R-22 system. The UNESCO World Heritage site uses the refrigerant to provide cooling for 44,132ft2 of chilling and freezing areas, located on the mezzanine on the landsides for cargo from the ships. Heat waste from the systems is then recovered to provide heating in the terminal and offices.
