Refrigeration plant supplies rapid cooling

Paul Boughton
Fujifilm Imaging Colorants (FFIC) develops and supplies high performance colorants for the global digital printing market.  The FFIC site at Grangemouth, Scotland, manufactures colorants for ink jet and toner cartridges used in printers and copiers throughout the world.

In a contract valued at over a quarter of a million GBP, Star designed and installed an environmentally conscious process cooling plant for colorant manufacture at the Grangemouth, UK, site. The low temperature ammonia water-cooled chiller provides energy efficient operation at varying process heat loads.

Star’s refrigeration plant supplies rapid cooling to reactor jackets on a number of new process reactors.  This plays a key role in providing accurate and responsive temperature control of key processing steps, helping to ensure materials produced satisfy exacting quality standards.

Operating on natural ammonia refrigerant, the highly efficient plant cools 156m3/hr of ethylene glycol/water solution from –17C to –20C.  It is designed to meet a peak process reactor heat load of 430kW for less than one hour, a sustained operating load of 350kW and a normal operating duty of 20-160kW.

Three screw compressors enable the chiller to provide excellent energy efficiency at part load.  The plant also features low refrigerant charge plate heat exchangers, a horizontal surge drum and two fixed speed primary glycol pumps.
 
Further energy savings are provided by variable speed drive motors on two secondary glycol pumps. This enables flow to be varied according to cooling demand. Star’s patented TELSTAR computerised control system ensures optimum performance and efficiency. This includes floating suction and discharge pressure control, as well as optimised compressor sequencing.

The plant is located externally, adjacent to the main manufacturing building. The compressors are housed in a low noise acoustic enclosure. This features access doors, ammonia gas detection system and extract ventilation fans.

Commenting on the project, Zac Meadows, Chemical Engineering Group Leader for Fujifilm Imaging Colorants says: “Star worked closely with us to design an economically competitive solution which satisfied our demanding production requirements and environmental needs.  We look forward to the plant continuing to deliver reliable and efficient cooling across the range of colorant production processes to be operated in this flagship new facility.”

Star Refrigeration is the UK’s largest independent industrial refrigeration engineering company.   Star is a Total Solutions Provider for refrigeration, process cooling and air conditioning.

Star focuses on the design, manufacture, installation, commissioning and maintenance of industrial refrigeration systems.  The company offers turnkey supply and support to all users of industrial refrigeration and HVAC.
 
Star's technical advisory arm, Star Technical Solutions (STS), operates as an independent consultancy providing advice on refrigeration engineering issues.  Star also owns food freezing and chilling equipment specialist Starfrost, as well as mechanical and electrical contractors Penec.

For more information, visit www.star-ref.co.uk