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Sumit Singhal
Sumit Singhal
Sumit Singhal loves modern architecture. He comes from a family of builders who have built more than 20 projects in the last ten years near Delhi in India. He has recently started writing about the architectural projects that catch his imagination.

Hydroelectric Power Station in Bavaria, Germany by Becker Architekten

 
August 7th, 2011 by Sumit Singhal

Article source: Becker Architekten

The amorphous form appears both gentle and dynamic, resembling, among other things, a large fish. But it can also be viewed simply as a volume inspired by the motion of waves – as if the structure had taken shape as a flowing, swelling mass and then solidified. The form of this hydroelectric power station traces and dramatizes the channelled dynamism of the water as it flows into the holding basin, down through the turbines, and back into the River Iller. Another obvious association is with eroded stone; in the surrounding Allgäu region, not far from the Alps, such isolated rock formations are a common sight.

Hydroelectric Power Station

  • Architect: Becker Architekten
  • Project: Hydroelectric Power Station
  • Location: Keselstraße 14 a, D – 87435 Kempten / Allgaeu, Bavaria, Germany
  • Client: Allgäuer Überlandwerk AÜW, Kempten
  • Construction period: november 2007 – june 2010
  • Area in square meters: unknown

Hydroelectric Power Station

  • Ground-plan area (gross): approx. 1 040 m²; effective area : approx. 590 m²
  • Cubature (wrapping construction): approx. 3865 m³
  • Project cost: approx. 7,8 Mio. Euro (gross), without powerstation technology
  • Projekt team: Michael Becker, Bernhard Kast, Franz G. Schroeck
  • Structural engineer (underground construction): RMD Consult, Munich
  • Structural engineer (building construction): Konstruktionsgruppe Bauen, Kempten
  • Consultant building physics: Mueller BBM GmbH, Planegg

Hydroelectric Power Station

  • Consultant sound protection (underground construction): TIWAG, Innsbruck (Austria)
  • Consultant sound protection (building construction): Tecum, Kempten
  • Consultant fire protection: IB Reiner Krebs, Dietmannsried
  • Consultant lighning protection: Kunisch Blitzschutz, Marktoberdorf
  • Consultant security and health protection: Harald Kopp, Kempten
  • Mechanical engineering : VA_Tech Escher Wyss GmbH, Ravensburg
  • Steel construction for hydraulic engineering : Erhard Muhr mbH, Brandenburg

Hydroelectric Power Station

Awards :

  • german concrete award 2011
  • pbb german trade building award 2010
  • international liechtenstein award for sustainable construction in the alps (longlist) 2010

Skizze

This distinctive outer form owes its existence to the planning authorities. Originally, a specialist engineering firm had completed plans for a high-efficiency hydroelectric facility on the left bank of the river in Kempten to replace an old power station from the 1950s. Only after this had already been drawn up did the authorities decide that the new power plant should fit into the natural setting of the River Iller as well as harmonizing with the adjacent ensemble of listed nineteenth-century buildings comprising a spinning and a weaving mill.

Plan 1

The design by Becker Architects neither tries to render the power station invisible, nor to overstate its technical power. As an autonomous piece of contemporary architecture, it allows the old industrial buildings and the river landscape to retain their identity, but without denying its own. It accentuates the dividing line between water and building, using an architectural idiom of metaphors associated with the river landscape. Appearing to be made out of soft, malleable material, it establishes a semantic link between the use of renewable hydroelectric energy and the gentle method of harnessing that energy. Other ecologically significant aspects were also prioritized, such as the inclusion of a fish ladder and measures to minimize noise.

Plan 2

The flowing exterior consists of a three dimensionally curved reinforced concrete shell. Resting on slide bearings, and with a gap between it and the power station structure, the shell is capable of compensating differences in longitudinal deformation with respect to the sub-structure. Rough boards were used for the interior formwork, while the exterior was spray-coated, giving the surface an almost velvety character well suited to its shape, avoiding harsh light effects. This in turn assures a smooth transition from the shell to the pale fair-faced concrete walls enclosing the power station in the water. To minimize disruption of the homogeneous outward appearance, necessary openings were kept as small as possible. A lightweight concrete section, removable by mobile crane if drifting debris accumulates, also fits into the overall form. This immaculate impression will not last long, however, as the structure will soon age, changing its appearance.

Plan 3

What will remain is the dynamic gesture with which the shell connects the two ends of the power station, diving under the lattice arch of an existing steel cable bridge, thus allowing the original ensemble of five different bridging structures to be preserved. The interior is also an impressive sight, although different in character. While the outside plays with biomorphic associations, the interior reflects the technical quality of the turbines, which are also visible. This is certainly due more to pragmatic than to aesthetic considerations, as the inside of the power plant is far less of a public place, although guided tours are offered – an opportunity taken up by many in the months after the project was completed. Nonetheless, the interior, too, evokes fittingly water-related images, as the lateral ribs reinforcing the construction recall the frames of a ship’s hull. The tension-filled volume of the exterior is seen in reverse, with a varied sequence of cramped and open, high and low spaces, and there are also views of the water. Thanks to a new foot- and cycle-path along the river, the power station, which will supply 3000 households, can be viewed at any time – a sight well worth seeing, including at night, when it is dramatically lit.

Plan 4

Detail

Model

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Category: Power Plant

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