*에너지 벙커 [ IBA Hamburg ] Abandoned concrete bunker converted into a green power plant

2차 세계대전, 전쟁의 최전방 중요한 교두보 역활을 수행하는 거대한 벙커는 이제 인근지역의 주거단지에 열원을 공급하는 그린 파워 플랜트로 재구성된다. 에너지 벙커는 에너지를 생산하는 플랜트 시설 외에 이전 전쟁을 기념하는 기념관과 전망대, 상설전시장 그리고 까페로 구성 된다. 내부에 설치된 거대한 탱크, 그 안에 채워진 2백만리터의 온수는 주변 지역을 난방하는 열원으로 바이오메스 열 파워 플랜트와 우드 버닝 유닛 그리고 지붕에 설치된 태양열 시스템 그리고 인근에 위치한 산업단지에 남는 열에너지를 이용 온수를 생산한다. 42미터 높이의 거대한 콘크리트 구조물은 이제 전쟁의 어두운 과거는 뒤로, 새로운 미래를 위한 교두보로 제안된다.

reviewed by SJ

From a war memorial to a green power plant: the Energy Bunker in Hamburg-Wilhelmsburg, created by HAMBURG ENERGIE and the International Building Exhibition IBA Hamburg, is the first project of its kind in the world. For exactly a year the Energy Bunker has been supplying heat energy to the residential buildings in the surrounding area. Six months ago it opened to visitors and has become a major attraction. The development of this remarkable joint project is now complete and is being celebrated with an opening ceremony and the unveiling of two plaques.

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The clients are the IBA Hamburg (restoration and expansion of the building) and HAMBURG ENERGY (energy supply). As part of a joint opening ceremony Uli Hellweg and Dr Michael Beckereit have now unveiled the IBA plaque and the ERDF sign.

"Today we are here to mark a project that encapsulates the philosophy of the IBA Hamburg more than any other," said IBA director Uli Hellweg. "After standing empty for more than sixty years, followed by a seven-year project development and construction phase, this war monument has been transformed into a sign of the dawn of a climate-friendly future. Not only does it produce clean energy to supply the district, but also demonstrates how local resources can be used to produce and store heat. With its viewing platform, permanent exhibition, and café, the Energy Bunker also makes an appealing visitor attraction. Almost 100,000 people have visited the Energy Bunker so far."

Dr Michael Beckereit, director of Hamburg Energie, said, "The Energy Bunker has been supplying heat energy since October 2012, and since March 2013 it has also been providing electricity. Its performance and network are gradually being extended. By the final stage of expansion we will be supplying 3,000 households with heat from the Bunker and generating over 2.5 million kilowatt-hours of electricity."

At the heart of the project is a two-million-litre water reservoir that acts as a large heat buffer inside the Energy Bunker, and serves as the centre of a local heating network for the Reiherstieg district. The reservoir is fed by the heat from a biomass thermal power plant and a wood burning unit, as well as a solar thermal system on the roof. This is supplemented by the waste heat from a nearby industrial plant. By bringing these different sources of energy together in an effective way, the Energy Bunker is able to supply the adjacent Global Neighbourhood with heat, and in future will be capable of providing heat to most of the Reiherstieg district. At the same time it feeds into the public grid green electricity from the thermal power station and the photovoltaic unit fitted to the south façade.

History of the Energy Bunker

The 42-metre-high flak bunker on Neuhöfer Strasse was built during World War II. After the end of the war this concrete behemoth could not be blown up without endangering nearby tenements, so the British Army restricted itself to destroying the interior. On the outside, however, the bunker remained more or less intact. From then on, the ruin stood in the middle of the residential area, largely unused and in danger of collapsing. In 2006 the conceptual planning for converting the building into an Energy Bunker began, and 2010 saw the first static tests carried out. Safety, restoration, and conversion tasks on the bunker could only begin in 2011. The total cost of the work amounted to €26.7 million. As a flagship project, it was funded by the European Regional Development Fund (ERDF) and the Hamburg Climate Protection Concept.

from  dezeen