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  • VARI PRO™ ROOM CONTROLLER
    - DESIGNED FOR USERS

    Vari PRO™ room controller provides an amazing user experience. It gives direct feedback on energy consumption and service requirements for the user.
     
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  • VARI PRO™ ROOM CONTROLLER
    - DESIGNED FOR USERS

    Vari PRO™ room controller provides an amazing user experience. It gives direct feedback on energy consumption and service requirements for the user.
     
    Read more >
  • VARI PRO™ ROOM CONTROLLER
    - DESIGNED FOR USERS

    Vari PRO™ room controller provides an amazing user experience. It gives direct feedback on energy consumption and service requirements for the user.
     
    Read more >
  • PLEASANT INDOOR CLIMATE AND ENERGY EFFICIENCY
    BOX Vari™ -cassette fan coils are ideal for public spaces, hotels and demanding residential sites. Units are regulated by Vari PRO™ -wall controllers which are connected to the Service Next™ -service. These units, based on EC-technology, ensure the best internal ventilation, high efficiency and up to 80% savings in energy expenditure.
     
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  • PLEASANT INDOOR CLIMATE AND ENERGY EFFICIENCY
    GRAND Vari™ -fan coils and hotel convectors are ideal for public spaces, hotels and demanding residential sites. Units are regulated by Vari PRO™ -wall controllers which are connected to the Service Next™ -service. These units, based on EC-technology, ensure the best internal ventilation, high efficiency and up to 80% savings in energy expenditure.
     
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  • OPTION SELECTION PROGRAM
    Our portal system gives customers a centralized Service Next™ system, Option –selection program and, for our service contract customers, a maintenance monitoring solution.
     
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  • COMPREHENSIVE SERVICE, UNIT OPTIMIZATION AND SAVINGS
    Service Next™ brings our customers ease of use, reduced expenditures and makes total lifecycle management and optimization possible by allowing customers to react fast to change.
     
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  • RESEARCH, TESTING AND CUSTOMER ORIENTED APPROACH IN DESIGN
    Chiller Oy is one of Europe’s leading manufacturer of energy efficient and functional cooling and heating solutions. The high quality of our products is based on our own research and development in all aspects of the manufacturing process. Lifecycle assessment and material recycling is always considered throughout manufacture.
     
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  • PRECISION AND STANDARD AIR-CONDITIONING UNITS
    SMART Vari™ -systems offer optimal precision and standard air conditioning. The units are based on EC-fan motor solution, which improves efficiency ~ 10%. Over 50% energy savings are achieved with new compressor technology and electronic expanding valves. Units are available with either DX- or water radiator.
     
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  • HEAT PUMP SOLUTION DESIGN AND IMPLEMENTATION
    Chillquick Thermo™ is a revolutionary series of heat pumps which enable flexibility and energy efficiency as never before. Two-way units both chill and heat. Chillquick Thermo™ series can fulfill all site needs up to 2000kW. Chillquick Thermo™ -heat pumps can be connected to the Service Next™ -service.
     
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  • INNOVATIVE AIR-CONDITIONING SOLUTIONS FOR DEMANDING SITES
    Chiller Oy is one of Europe’s leading manufacturer of energy efficient and functional cooling and heating solutions. The high quality of our products is based on our own research and development in all aspects of the manufacturing process. Lifecycle assessment and material recycling is always considered throughout manufacture.
     
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  • FRESH NEWS FROM
    THE HVAC FIELD!
    At the Green Future magazine we report the current issues in the field, our projects, our customers and products.
     
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  • CHILLQUICK™ -WATER CHILLERS AND -COLD WATER STATIONS
    Modular solutions with free cooling and precise control of functions. Environmentally friendly and customer specified Chillquick™ -water chillers and cold water stations are manufactured from factory tested modules. Multiple standardized tests are carried out during assembly, in addition to a full scale test run with customer specified parameters.
     
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Cooling in the key-role in Ruukki's Raahe steel plant

The steel industry process is dependent on the high degree of heat, as well as cooling. Approximately 2.2 million tonnes of steel per year are produced at the Raahe steel plant. Hot-rolled steel sheets and coils are manufactured for use in, among other things, the engineering, transportation and construction industries. The Raahe plant also manufactures a variety of special steels that are particularly wear-resistant, specially coated or very strong and impact-resistant.


Regional Supervisor at the Ruukki's Raahe steel plant, Ismo Vähäjylkkä, has a lot of responsibility.
Photo:
V-P Moilanen

Hundreds of cooling devices
Vähäjylkkä and his supervisor, property manager Sauli Kallio, work with approximately 2.400 other Ruukki workers on this large plant site. Its surface area is more than 500 ha, and the total surface area of buildings alone is 46 ha, with a capacity of about 5.75 million cubic metres.

Nearly six million cubic meters can accommodate all kinds of properties, from the office buildings to a variety of production facilities. The most impressive of all the buildings is a rolling mill of over 16 hectares. Many of the production facilities, such as a blast furnace building, power plant, sinter plant and research centre, were built in the 1960s. The coking plant buildings are however, relatively new; they were completed in the 1980 and 90s. Some of the offices are located in modular buildings.

"Almost all buildings require some kind of cooling", explains Vähäjylkkä. There are approximately 300 water chillers in the plant area, with a total cooling output of 7.5 MW.

The total number includes the cooling of the normal office spaces, different automation facilities, electricity and IT facilities, and the cooling related to the process.

"The cooling water station for the main engine of the rolling mill, which was built in 2004, has the largest cooling output
(1 MW)", he says.

He was involved in the investment decision on cooling units and in the preparation for modernisation, and as a supervisor of the actual project. He is also responsible for the assessment of HVAC conditions.

At such a large production facility, something is always being renovated, repaired or built. At the beginning of the year, investment decisions on three cooling units were stood waiting on Vähäjylkkä´s desk. Old R-22 units are being replaced in the plant area. Last year, the blast furnaces were renovated, which significantly improved the production energy efficiency. The steel industry requires high temperatures, but the process also depends on cooling.
According to the property manager, Kallio, the cooling investments are significant even at the annual level.

"Of course, the quantity fluctuates each year, but EUR 100.000 is an indicative number."

Special skills
So far, Ruukki has had its own planning organisation, but today the long-term partners are responsible for the cooling design and contracting.

"It is very important that both designers and contractors have vast experience of working with Ruukki. We can be confident that they are familiar with the house rules and needs", remarks Vähäjylkkä.

Wide range of equipment and vast area
Knowledge of the environment, processes and business practices is very important. Devices are required to provide a very high level of operational reliability. The damage caused by non-functional cooling is considerable. The power supply simply cannot be interrupted. Also, the cooling of the production facilities must not fail. Otherwise, a bridge crane, for example, might suddenly end up in a problematic situation.

Reliability, high quality, compact design and ease of installation are the reasons why approximately one hundred of Chiller's cold water stations, and dozens of cabinet machines at the Ruukki's Raahe plant, take care of the cooling of these special facilities.

The latest cold water stations, delivered in 2010, are under the Service Next™ ovarall concecpt. Service Nex™ enables centralised monitoring and optimisation of the entire plant's cooling system.




Ruukki in brief
  • The Raahe plant is a part of Ruukki's steel business sector.
  • Ruukki specialises in steel and steel construction.
  • Ruukki employs approximately 9.000 people and has a wide distribution and dealer network in about 30 countries.
  • In 2012, the group revenue was EUR 2.8 bn.
  • Ruukki Construction supplies steel structure solutions for commercial, office and industrial buildings, port and waterway construction as well as roofing products and services.
  • Ruukki Metals manufactures special steel products for private homes, such as wear-resistant and specially-coated products for challenging, energy-efficient applications.

Chiller delivery

  • Chillquick™ cold-water stations with free cooling (CGIW-120, 300 kW)
  • SMART Vari™ Standard air-conditioning machines with hot gas heating (energy control optimisation)
  • Service Nex™ overall concept explodes the unit into components and compares their limits with BMS's changing information. Best way to optimise the efficiency of the plant and control its thermal conditions is to analyse the information.




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