Bæredygtige ungdomsboliger Aarhus Havn Boligforeningen Ringgården Sustainable Student Housing Aarhus Harbour It is vital that the new quarter also contains social housing, so that it doesn’t become exclusively for home owners.” Palle Jørgensen, director, Ringgården Housing Association Unge tilfører masser af liv på havnen Det er ikke nyt, at Boligforeningen Ringgården bygger 0-energi betyder, at husene som minimum producerer ungdomsboliger – det har vi gjort siden 1953. Det er heller den energi, som de forbruger til drift af husets fællesfa- ikke nyt, at vi bygger huse, der energimæssigt kan begå ciliteter. Det gør de ved hjælp af solceller, og de forven- sig langt ud i fremtiden. Det har vi gjort siden 1997. tes endda at producere mere el, end der skal bruges til Men det er nyt, at vi bygger på havnen i Aarhus. Det driften. gør vi, fordi vi gerne vil involvere os i udviklingen af det nye byområde. Vi ønsker at bidrage til en mangfoldig Beboerne skal altså kun betale for den energi de bruger beboersammensætning, så havnen ikke bliver en ejer- i boligen – og de behøver ikke frygte udgifterne. Både boligghetto. udformning og materialer giver bygningerne en række Derfor har vi bygget to huse med i alt 149 attraktive al- passive egenskaber, som vil gøre sit til at nedsætte mene boliger til unge mennesker, som helt sikkert vil energiforbruget. tilføre masser af liv i byens nye boligområde. 0-energi huse Det er vigtigt, at der Vi vil udfordre branchen og byen ved at bringe den bygges almene boliger i grønne fane ind i den nye bydel og vise, at det faktisk den nye bydel, så den ikke kan lade sig gøre at skabe bæredygtigt byggeri af høj arkitektonisk kvalitet. bliver en ejerboligghetto.” Begge huse er 0-energi huse, det vil sige, at de lever op Palle Jørgensen, til den forventede 2025 energiramme. direktør, Boligforeningen Ringgården Young people bring a lot of vitality to the harbour quarter The fact that Ringgården Housing Association is build- ing student housing is nothing new – we’ve being doing it since 1953. Nor is it anything new that we are building homes that, in energy terms, will hold their own for a long time to come. We’ve been doing that since 1997. However, what is new is the fact that we are building homes at Aarhus Harbour. We are doing this because we are keen to get involved in the development of the new urban quarter. We would like to encourage to a diverse population, so that the harbour area doesn’t become dominated by home-owners. Therefore, we have built two residential blocks with a total of 149 attractive social housing units for young people who will surely bring a lot of vitality to the city’s new urban quarter. Zero-energy housing We want to challenge the industry and the city by incor- porating a green agenda into the new urban quarter and prove that it is actually possible to create sustainable buildings of a high architectural quality. Both blocks are zero-energy buildings, meaning that they meet the anticipated energy efficiency vision for 2025. Zero-energy means that the buildings, as a minimum standard, produce the energy they consume to run the buildings’ shared facilities. This is done by means of PV solar cells (photovoltaic) and, in fact, they are expected to produce more energy than is required to keep the buildings going. Therefore, residents only have to pay for the energy they consume – and they needn’t dread the bills. Both the design and the materials used give the buildings an array of passive properties that will help reduce energy consumption. Det Lille Havnehus Ringgårdens to havnehuse danner sam- The Little Harbour House men med Grundfos kollegiet og Marina Det Store Havnehus House en form for Minimanhattan for The Big Harbour House unge i det nye boligområde på havnen – med udsigt til lystbådehavnen og Ris- skov, samt til byen og bugten. Along with the Grundfos Halls of Residence and the Marina House, Ringgården’s two housing blocks create a kind of mini-Manhattan for young people in the new waterside residential quarter – with a view of the marina and Riisskov, as well as the city and the bay. Der høstes så megen energi, Det at huset er selvforsynende Solmarken på husets tag og de markante rammer med Store solceller på husets sydøstfacade er det synlige bevis på, at huset producerer energi, så meget at huset er selvforsynende. Solcellerne producerer energi til drift af Havnehus fællesfaciliteterne – ca. 56.000 kWh om året. Solcellerammerne har tillige en funktion som altanværn, lyd- og solafskærmning, og så bidrager de til husets le- Højhuset er tegnet af Arkitema og skabt i et samarbejde gende udtryk. Det samme gør vinduerne, som udover at med entreprenørfirmaet Myhlenberg, samt de to rådgi- variere i størrelse, ser ud som om de er tilfældigt placeret. vende ingeniørfirmaer Esbensen og Niras. Højhuset har hentet sin inspiration i havnens miljø – bl.a. Huset er 12 etager højt og på i alt 4.900 kvm. Der er 99 har det arvet siloernes højde og drøjde. Det er et skole- boliger i alt, 94 to-værelses på 50 m² og 5 etværelses eksempel på intelligent brug af beton, da den tynde væg- på ca. 45 m² – begge typer er inklusiv andel af fælles- konstruktion i højstyrkebeton, sikrer minimalt varmetab areal. og maksimalt boligareal. Derfor var huset nomineret som et af fire projekter til Dansk Byggeris Betonpris 2013. Med ungdomsbolighøjhuset på havnen har vi le- get lidt, og det er der altid nogle, der ikke synes om. Men hvis vi ikke tør skille os ud og udtrykke noget, så bliver det en gang ligegyldig kødrand.” Torben Lodberg, arkitektfirmaet Arkitema Harnessing energy for complete The Big self-sufficiency The PV solar cell panels on the roof and the distinctive Harbour frames with solar cells on the south-eastern facade of the building are visible proof that the building produces energy; so much, in fact, that the building is self-suffi- House cient. The PV solar cells produce the energy required to run the shared facilities – approximately 56,000 kWh per year. The frames with PV solar cells also act as a safety The high-rise residential block was designed by railing, and shield against noise and the sun, as well Arkitema and built in partnership with the contractors as contributing to the building’s playful appearance. Myhlenberg and the two consulting engineer companies, The same can be said about the windows, which, in Esbensen and Niras. addition to being of varying sizes, look as if they have been randomly placed. The block comprises 12 storeys and a total area of 4,900 m2. There are 99 homes in total, 94 two-room The inspiration for the tower block comes from the har- apartments of 50 m² and 5 studio apartments of ap- bour environment; for example, it has adopted the height proximately 45 m² – both types include a percentage of and width of the silos. It is a classic example of the shared area. intelligent use of concrete, since the thin wall construction in high-strength concrete ensures minimal heat loss and maximum living space. For this reason, the building was nominated as one of four projects for the Danish Construction Association’s Concrete Prize 2013. We’ve been a little daring with the youth housing blocks at the harbour, and there will always be some people who don’t like it. But if we don’t take risks and make a statement then it has no impact.” Torben Lodberg, Arkitema architectural firm Husets ’sociale lynlås’ The building’s ’social zipper’ Huset har en markant indskæring, som skyldes arkitek- The facade of the building has a distinctive recess, ternes spekulation i at placere boligerne, hvor udsigten which is due to the architects’ vision about situating og daglyset er bedst. the apartments where the view and natural daylight are I indskæringen er der udformet en ”social lynlås”, som optimal. indbyder til fællesskab og skaber en smuk sammen- A ‘social zipper’ has been incorporated into the recess hæng mellem ude og inde. Den starter med den store to encourage social interaction and function as an opholdsterrase på terræn, hvorfra der er direkte adgang attractive link between the exterior and interior of the til vaskeri og fælleslokaler, og fortsætter op gennem building. It starts with the large sun terrace on the huset med fælles opholdsaltaner, der ligger skærmet ground floor from which there is direct access to the for vinden inde i bygningskroppen. laundry and shared areas, and continues its way up the building with shared sun balconies that are shielded from the wind by the body of the building. Strategy for zero-energy • High level of insulation: 250-400 mm insulation. • Use of energy-efficient LED lighting in kitchens, bath- U-values of 0.09-0.15 W/m². rooms and shared areas. • Triple-glazed low energy windows with an average • Solar cell panels on the south-eastern facade which U-value of 0.9 W/m². form railings on the balconies and, at the same time, • High density of all structures of 0.4 l/s/m² at 50 Pa, function as shield against noise and the sun. There is demonstrated in a blower door test. approx. 400 m2 solar cells on the facade. • Heavy concrete back walls with high thermal mass • On the roof there is approx. 250 m2 solar cells. for passive equalisation of temperature fluctuations. • Slightly tinted solar screening glass on south-west • High-strength concrete for thinner facade, thereby facing facades provides an excellent indoor climate. creating better natural daylight conditions.