By so doing, the company has made a timely response to new legislation, which will suspend the market availability of virgin HCFC refrigerants for service purposes as of 31 December 2009. The conversion, or ‘retrofit,’ was conducted by the Cologne branch of Johnson Controls Systems & Service GmbH, a company familiar with DuPont refrigerants from previous, smaller projects.
Norbert Holle, responsible for managing the cooling systems at Alunorf, checks operating pressures following the conversion of the cooling system for the hot rolling mill to non-ozone-depleting DuPont™ ISCEON® MO29. Insert picture: Alunorf GmbH is the world\'s largest aluminium rolling and remelt plant, and is the largest employer in Neuss with 2,100 employees.
As an initial step, technicians converted one of the cooling circuits belonging to an air-cooled water chiller system. After checking the operating data, the second cooling circuit was changed to ISCEON® MO29, as well as further systems. “Before carrying out the conversion, we took detailed readings from all systems, which were then repeated after the change was made,” explains Bastian Sauermann, service salesman at Johnson Controls. “Following removal by suction of the refrigerant, we first replaced the springs, the working valves and the filter-drier. These steps were taken based on our own experience. Thereafter, the refrigeration circuit was evacuated and then recharged with ISCEON® MO29. For the water-cooled water chiller systems we exchanged the oil as a preventative measure. Overall the work was carried out without a hitch. The systems’ cooling performance is around the same as it was prior to the conversion.”
Alunorf operates three water chiller systems for cooling the hot and cold rolling mills: in the hot rolling mill there are two air-cooled York water chiller systems, each with two cooling circuits and one piston compressor per circuit (total output approx. 800 kW). The cold rolling mill is cooled by a water-cooled York water chiller system with one cooling circuit. Cooling output is 400 kW.
The company is the world's largest aluminium rolling and remelt plant and produces hot- and cold-rolled strips of aluminium for use in a range of applications including automotive body parts, drink cans, lids, screw closures, tinfoil or litho sheets. Alunorf has made it a public objective to align its manufacturing processes and products with its own environmental policy. Along with its health and safety programme, quality policy and corporate philosophy, the company’s environmental policy is amongst key guidelines for its operations.Background – Ban of HCFCs:
Aluminium Norf GmbH was founded in April 1965 as a joint venture between former Alcan (today Novelis) and former VAW (today Hydro Aluminium). With its greatest expansion in the period between 1990 and 1994, Aluminium Norf GmbH – abbreviated Alunorf – became the world’s largest aluminium rolling and remelt plant. The company has 2,100 employees and produces hot- and cold-rolled strip in many different aluminum alloys for a wide range of applications. Most of this material is shipped as coil stock to the plants of both parent companies for further processing. Its annual sales volume is approximately 1.5 million tonnes.
Johnson Controls is the global leader that brings ingenuity to the places where people live, work and travel. By integrating technologies, products and services, it creates smart environments that redefine the relationships between people and their surroundings. Its team of 140,000 employees creates a more comfortable, safe and sustainable world through its products and services for more than 200 million vehicles, 12 million homes and one million commercial buildings. For complete and specific technical specifications and/or characteristics of the equipment, please visit www.johnsoncontrols.com.
DuPont Fluorochemicals is a leading global supplier of refrigerants, using science and technology, market knowledge and global reach to provide sustainable materials and solutions to enhance personal comfort, enable food preservation, improve industrial processing and reduce environmental footprints.
DuPont is a science-based products and services company. Founded in 1802, DuPont puts science to work by creating sustainable solutions essential to a better, safer, healthier life for people everywhere. Operating in more than 70 countries, DuPont offers a wide range of innovative products and services for markets including agriculture and food; building and construction; communications; and transportation.
The DuPont Oval logo, DuPont™, The miracles of science™ and ISCEON® are trademarks or registered trademarks of DuPont or one of its affiliates.
FLCH-EU-2008-17This press release is based on information provided by:
Electron tomography technique leads to 3-D reconstructions at the nanoscale
24.05.2018 | The Optical Society
These could revolutionize the world
24.05.2018 | Vanderbilt University
The more electronics steer, accelerate and brake cars, the more important it is to protect them against cyber-attacks. That is why 15 partners from industry and academia will work together over the next three years on new approaches to IT security in self-driving cars. The joint project goes by the name Security For Connected, Autonomous Cars (SecForCARs) and has funding of €7.2 million from the German Federal Ministry of Education and Research. Infineon is leading the project.
Vehicles already offer diverse communication interfaces and more and more automated functions, such as distance and lane-keeping assist systems. At the same...
A research team led by physicists at the Technical University of Munich (TUM) has developed molecular nanoswitches that can be toggled between two structurally different states using an applied voltage. They can serve as the basis for a pioneering class of devices that could replace silicon-based components with organic molecules.
The development of new electronic technologies drives the incessant reduction of functional component sizes. In the context of an international collaborative...
At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.
At this year's LASYS, the LZH will exhibit light-based processes such as cutting, welding, ablation and structuring as well as additive manufacturing for...
There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?
At Display Week 2018, scientists from the Fraunhofer Institute for Applied Polymer Research IAP will be demonstrating today’s technological possibilities and...
So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics
Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...
25.05.2018 | Event News
02.05.2018 | Event News
13.04.2018 | Event News
25.05.2018 | Event News
25.05.2018 | Machine Engineering
25.05.2018 | Life Sciences