BESTFACADE, Åke Blomsterberg, 2007-11-12 WP 5: Best practice guidelines Energy and Building Design University of Lund Åke Blomsterberg BESTFACADE, Åke Blomsterberg, 2007-11-12

BESTFACADE, Åke Blomsterberg, 2007-11-12 Objective Information supporting in the design, choice, implemenation and management of energy efficient and healthy office buildings (refurbishment and new construction) with double skin facades BESTFACADE, Åke Blomsterberg, 2007-11-12

BESTFACADE, Åke Blomsterberg, 2007-11-12 Target group Clients/developers Decision makers Governmental bodies Standardization (not a target group, but referenced to) Architects Civil and HVAC engineers Facility managers Façade suppliers BESTFACADE, Åke Blomsterberg, 2007-11-12

Work since previous meeting modified format editing more references English corrections some text deleted and some added BESTFACADE, Åke Blomsterberg, 2007-11-12

BESTFACADE, Åke Blomsterberg, 2007-11-12 Description of work Part 1 Fundamentals Part 2: Applications Part 3: Tools BESTFACADE, Åke Blomsterberg, 2007-11-12

BESTFACADE, Åke Blomsterberg, 2007-11-12 Part 1: Fundamentals Common basic scientific, technical and economic knowledge on double skin facades BESTFACADE, Åke Blomsterberg, 2007-11-12

BESTFACADE, Åke Blomsterberg, 2007-11-12 Part 1: Fundamentals What is a glazed building Architectural aspects Technology Glazing Facade construction Costs BESTFACADE, Åke Blomsterberg, 2007-11-12

BESTFACADE, Åke Blomsterberg, 2007-11-12 Part 2: Applications ”Detailed” practical information for design, choice, management, use and maintainance of DSF and buildings with DSF (new construction and refurbishment?) Performance specifications LCC ”Rules of thumb” BESTFACADE, Åke Blomsterberg, 2007-11-12

Description of work Part 2: Applications Case studies – good and not so good examples, from WP1 and WP3 When DSF are appropriate Impacts of DSF BESTFACADE, Åke Blomsterberg, 2007-11-12

Description of work Part 2: Applications Energy use, daylight, indoor climate and sustainability Potential advantages with double skin facades Potential problems with double skin facades and how to overcome them Performance specifications and requirements BESTFACADE, Åke Blomsterberg, 2007-11-12

Description of work Part 2: Applications The building process Design Construction Commissioning, new Operation and maintenance, new Costs Case studies Predicted performance - examples BESTFACADE, Åke Blomsterberg, 2007-11-12

Description of work Part 3: Tools General info on simulations Review of simulation tools BESTFACADE, Åke Blomsterberg, 2007-11-12

BESTFACADE, Åke Blomsterberg, 2007-11-12 Approval Reynaers FhG-IBP MCE ENTPE BBRI NKUA? ISQ? Dimglas? Skanska? IWT? BESTFACADE, Åke Blomsterberg, 2007-11-12

BESTFACADE, Åke Blomsterberg, 2007-11-12 Building: Kista Science Tower, Kista (Stockholm) Year of construction: 2002-2003 Size: 32 storeys, 6 000 m² double skin façade, floor area 700 m²/storey i.e. appr. 22 000 m² Use: Office non-public, cell-type or open-plan office Motive: Image, commercial property development project, fully glazed façade to give a feeling of volume Principle of façade construction: Two of the three facades are double skin facades, the third (to the north-east) is a single skin facade. The double skin facades are of the corridor façade type with diagonal ventilation. In the cavity there are gangways on each floor and automatically controlled (2.7 m sections) perforated Venetian blind. The windows are non-openable. Façade construction, material: Prefabricate one-storey high aluminium construction Outer skin: 8/10 mm H, non-coloured Inner skin: double-pane sealed glazing units with LE glass, non-coloured, 1.35 m on centre HVAC: Balanced ventilation with heat recovery, indoor design temperature in winter 22 ± 1,5 ºC, in summer 24 ºC at design outdoor temperature + 26 ºC. Cooling from active cooling beams 2.7 m on centre. Cooling energy source is district cooling. Heating provided by radiators. Heating energy source is district heating. Light: No daylight control system, HF fluorescent lighting Fire: Every fourth storey is fire sectioned. The office areas are equipped with a sprinkler system. Energy use: 2004 Electricity 93 kWh/m²year, heating 111 kWh/m²year, cooling 42 kWh/m²year i.e. total energy use 246 kWh/m²year Lessons learnt After construction internal Venetian blinds had to be installed on the north-eastern façade, to control daylight and solar gains. BESTFACADE, Åke Blomsterberg, 2007-11-12