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Oslo – : Sustainable development with a district heating/cooling system using a Unitop® 28/22CY

The Fornebu development site is Client equipped with a district heating/cool- Baerum Fjernvarme AS ing system. 1338 ,

District heating… Baerum Fjernvarme Baerum Fjernvarme estimates a total Located in the vicinity of , heating demand of 57,300 kW of which Baerum Fjernvarme AS is selling dis- heat pumps shall generate 26,000 kW. trict heating and district cooling. The 21,300 kW heating capacity depends company is owned by the Finnish For- on electricity and oil but is required tum group. only during the coldest period of the 3 year. The main distribution lines for District heating system 2003 IT Fornebu district heating will have a length of District heating system proposed 8 km and a main diameter of 400 mm. Norwegian Investors launched an in- Main energy stations dustry policy initiative in 1995 which Fornebu IT Fornebu included the establishment of an IT …and district cooling and knowledge centre at Oslo’s former Cooling is required by the commercial another Unitop® 28/22CY of similar Fornebu airport. sector with a capacity of 23,500 kW. capacity is installed. In the following year the IT Fornebu Cold sea water is used as source during vision company was established. The spring and autumn. In summer, the Heating and cooling – the natural way Baerum community approved a master Unitop® 28/22CY is also used as chiller. plan for Fornebu, which specified that For district cooling, the main distribu- 80 percent of the total capacity re- the area should accommodate a know- tion lines have a length of 4 km, the quired for heating and cooling of the ledge-oriented centre for high-tech diameter of the headers is 500 mm. Fornebu development site has its origin industrial activity at international in renewable sources. Sea water from The Unitop® 28/22CY was installed level. the Oslo fjord is exploited for the heat in the new head office building of pump during the cold period of the Telenor Fornebu, which is operating year. It is also used for cooling purposes From airport to sustainable since autumn 2002. in summer. community In order to enhance operating flexibil- Therefore, Fornebu’s district heating The 340-hectare Fornebu site is situ- ity and security even further, Baerum system is preventing emissions from ated 10 kilometres from downtown Fjernvarme linked Fornebu’s district conventional heating installations to a Oslo with its strong commercial and fi- heating/cooling system with the sys- large extent. nancial community. tems of neighbouring , where The development plan for the area in- cludes housing for a population of 5,000 and 15,000 work places in an area of 1,350,000 m2. 4 5

A major step in minimising the release • Large capacity, small floor space Technical Data of artificial refrigerant to the atmos- • High efficiency over the entire range phere has been accomplished by imple- Summer, cooling with Unitop® 22 • Operating temperatures mentation of the district cooling sys- Cooling capacity 2650 kW –40°C/+80°C tem, with centralised generation of the Power absorbed 515 kW refrigeration capacity required. COP 5.14 Plant control system Cold water temp. in +7.5 °C Cold water temp. out +5.0 °C ® A SattCon type PLC control system Unitop 28/22CY for heating and Cooling water temp. in +25 °C cooling supplied by Friotherm is used for local supervision. It is connected to the Cooling water temp out +31.5 °C ® The Unitop 28/22CY is equipped with central building control system. Summer, cooling with Unitop® 28 shell and tube type heat exchangers Cooling capacity 4100 kW for evaporation and condensation of Power absorbed 797 kW Service and maintenance the Refrigerant R134a. It allows for COP 5.14 various modes: Maintenance and Service works on the Cold water temp. in +7.7 °C ® Summer Cooling mode Unitop 28/22CY is done on demand by Cold water temp. out +5.0 °C specialists of Friotherm. Cooling water temp. in +25 °C 28 or 22 CY supporting natural cooling Cooling water temp out +35 °C 28 or 22 CY “stand alone” cooling unit Winter, heating with Unitop® 28/22 Winter Heat pump mode Heating capacity 5400 kW 28 and 22 CY in series Legend Power absorbed 1795 kW 1 The main runway of the former airport. COP 3.0 © Fjellanger Widerøe AS Cold water temp. in +5.0 °C Main features of the Unitop® 28/22CY 2 Birds view of IT Fornebu’s project. Cold water temp. out +2.5 °C • Open-type single stage compressor © IT Fornebu AS Heating water temp. in +50 °C 3 Fornebu district heating/cooling system Heating water temp. out +75 °C • Refrigerants: halocarbon/hydrocarbon network. © Baerum Fjernvarme AS • Integrated planetary type gears 4Unitop® 28/22CY unit, assembled in the Capacity control 10–100% works of Friotherm. On top the conden- • Heavy industrial design with vertically ser, bottom right the evaporator, left split casing for easy maintenance the sub cooler. • Multiple compressor units available 5 Main entrance to the Telenor head of- fice, where the Unitop® 28/22CY is in- • Suited for all drive systems stalled. © Telenor AS

Friotherm AG Zürcherstrasse 12 · P.O.Box 414 CH-8400 Winterthur · Switzerland Tel. +41(0)52262-8080 · Fax -0003 E-Mail [email protected] Internet www.friotherm.com

E004–05 Subject to technical change