Award winning cooling in Sweden
When Swedish energy company Öresundskraft needed an extension for its district cooling station in Helsingborg, Sweden, it opted for a solution that was better for the environment than traditional solutions – and also saves money.
The new district cooling station located in Helsingborg’s harbour was completed during the spring of 2018 and uses seawater from the Öresund Channel to produce district cooling. A fully developed cooling system of this kind can reduce electricity consumption and emissions by about 65–70% compared with traditional electrically powered cooling units. However, the use of seawater requires special precautions regarding a range of issues related to the environment, durability and maintenance. This is due to the unique installation conditions such as the effect seawater has on components and construction materials, and the possibility of clogging caused by shells and barnacles.
By using seawater as a coolant – combined with the use heat from the district heating network to power an additional absorption cooling unit – the new district cooling solution delivers much better environmental values than older, standard methods. Hence, Helsingborg’s district cooling station is now an efficient source of cooling for private homes, industrial facilities and shopping centres.
The largest prefabricated structure in Sweden
Uponor Infra’s 360™ approach delivers better solutions
Creative support throughout the project
Uponor Infra’s overall contract consisted of detailed engineering, project management, marine dredging and backfilling work; the underwater installation of intake and outfall pipelines; land-based sheet piling; excavation, backfilling and asphalt works; the welding and installation of the intake pipes; the supply and installation of a prefabricated pumping station including sluice gates; filtration units; two pumps with a capacity of 3,600m3/h; and the circulation of water to the heat exchanger and outfall pipeline and then back into the sea chambers and poly pig devices.
The entire process – from the first drawing and calculations to the groundwork, complicated installation process and land restoration – was conducted by Uponor Infra and subcontractors. In 2017, the project was awarded the CCAC international environmental prize at the UN’s climate conference COP23 in Bonn.The pump station custom-built by Uponor Infra is the largest prefabricated pumping structure in Sweden, at 23 metres long and with dimensions of ID/OD3,500/3,900mm. The robust nature of Weholite enabled the pump station to be prefabricated at Uponor’s factory in Fristad, transported to Helsingborg, and lowered into place in a waterfilled sheet-piled cofferdam. This method hugely rationalized the work and would not have been possible if a concrete solution had been selected.