References

Swimming Hall, Pori, Finland

Petri Konttinen

The first commercial application of an innovative, fully integrated solar thermal copper façade system is now operating at the new Pori Public Swimming Complex. The solar energy initiative came from the client - the City of Pori – as an urban example of environmental protection and carbon emissions reduction in Finland. The solar façade works in conjunction with roof collectors and this sustainability initiative is supplemented by roof-mounted photovoltaics as well.

Some 1000 m2 of prepatinated copper is used as the main material for all four facades, applied in horizontal bands of panels and elegantly handling the curves which are central to the design. It was considered important to maintain a consistent appearance for all the copper panels, although those on the south elevation are equipped with the fully-integrated solar thermal function behind (shown light blue on the elevation drawing).

Together, some 80m2 of façade collectors, working in conjunction with 200m2 of roof collectors, provide around 120 000 kWh of heat - as much energy as six average family houses use in the cold Finnish climate annually. This provides about 5% of the annual heat demand of the Swimming Complex. The solar system is used to preheat 4°C cold water coming from the cold pool. This preheated water is then mixed with a larger amount of water coming from the main circulation. The mixed water then passes through the roof collectors before joining circulation from the district heating system.

In summertime, when the Swimming Complex is closed and an open pool used instead, the combined solar thermal system is enough to maintain the pool water temperatures at normal levels without any additional heating. This enables the pool to remain full throughout the year, rather than have to empty and refill it, saving substantial amounts of water. In future it should also be possible to keep the Swimming Complex open for use throughout the summer.

Copper is especially well-suited to solar thermal façade systems because it has the best thermal conductivity of all the usual façade and roofing materials. It also enables architectural design freedom with the invisible integration of collectors behind the copper. In principle, any copper surface is suitable - whether prepatinated or oxidised copper or alloys - although there are some differences in energy production.

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Building

Owner: 
City of Pori
Completion date: 
2011
Country: 
Finland
Zip code: 
28100
City: 
Pori
Street: 
Itsenäisyydenkatu
Location: 

Categories

Applications: 
Facades/panels
Other
Panels
Transparent structures
Type of building: 
Sport, relaxation facilities
Copper used: 
Pre-patinated
Estate: 
New

Architect

Name, office: 
Tapio Antikainen, Arktes Oy

Copper contractors

Title: 
KT-Tähtinen Oy
Address & description: 
Copper product used: Nordic GreenTM

Find out more

Nick Hay
Description: 

Fully integrated solar thermal copper façade system is now operating at the new Pori Public Swimming Complex

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