GIFT 6th of August Trends in financial services buildings internationally. Pierre Jaboyedoff Effin Art

Transcription

1 GIFT 6th of August Trends in financial services buildings internationally Pierre Jaboyedoff Effin Art

2 Objectives of the presentation Showcase interesting example of energy efficient buildings 1. UBS (United Bank of Switzerland) former main building in Zurich (energy management on existing building) 2. Commerzbank Tower Frankfurt 3. KfW West Arcade in Frankfurt 4. Swiss Federal Office Tower, Switzerland 5. Financial servicers office buildings in Zurich 6. Courcellor 1 Tower, Unibail-Rodamco, largest portfolio of commercial buildings in Europe (35 Billions Euro) 7. Singapore statistical data, green buildings energy efficiency, zero energy building Highlight new approaches in term of floor equipment level Minimum core & shell Maximum completely equipped Question to ask for the market

3 1a) History of changes in energy management (example of United Bank of Switzerland Zurich Werd main building) Energy demand reduction by retrofit

4 b) Werd UBS Zurich Importance of operation and maintenance High rise built floor m 2 Old HVAC set-up Building envelope not changed Building energy management Reduction of heating EPI 369 to 115 kwh/m2-an Reduction of electrical EPI 389 to 155 kwh/m2-an Bâtiment Werd Economies d'énergie réalisées essentiellement par exploitation optimale [MJ/m2/an] Exploitation, consignes (1) Chaudières, débits, consignes (3) Récupération machine de froid (4) Offices Central HVAC units ' 1 2 Text Troue Rext Primary air temperature T5 [ C] Outdoor temperature T0 [ C] Tpul Rpul 6 6 [ C] 1 0' ' Heating Cooling 50 Air flow rate (105'00 m3/h) (continuous) 100 % > (occupancy only) Echal Eel 0 % Time (24 hrs) x [gr/kg air sec]

5 2) Commerzbank Frankfurt Commerzbank Frankfurt Known as «GreenBuilding» Résults: Measured EPI: 309 kwh/m2-an (built-area), 621 kwh/m2-an (carpet area) Weak points Mechanical Ventilation without heat recovery Poor efficiency of the solar protections

6 3a) KfW West Arcade in Frankfurt (2011) The KfW West Arcade in Frankfurt consumes only 98 kwh/m² of electricity. This makes the new building, which was opened in July 2010, one of the most energy efficient office buildings in Germany The KfW Westarkade was awarded as Best Tall Building Overall in the 2011 CTBUH Awards Program.

7 c External movable solar lamella louvers (inside the double skin) very efficient solar protections

8 3c) West Arcade in Frankfurt (2011) Slab cooling Natural ventilation Mechanical ventilation supply at facade floor Return in a central vertical duct

9 3d) West Arcade in Frankfurt (2011) Shallow floor plate Slab cooling Open ceilings Provided lighting luminaires

10 4a) OFS Tower City of Neuchâtel Labelled «Minergie ECO» (Swiss high performance standard) NE-001-ECO Architects: Bauart

11 4a) OFS Tower City of Neuchâtel Example of applications of sophisticated tools during the design process Paradox of high energy performance Example: o Energy efficient buildings and systems The simpler and more bioclimatic the buildings are, the more complex the design process is More sophisticated design tools needed Systemic analysis Natural and hybride ventilation systems Adiabatic cooling No wind The higher offices are not sufficiently cooled 600 W /m2 at 11h00 SOUTH facade the first level offices are correctly cooled

12 kwh/m2-an 4c) OFS Tower City of Neuchâtel Energy Balance Sheet Energy Balance 2007 (without computers) EPI: 32 kwh/m2-yr OFS Tower, city of Neuchâtel Elec. Technical devices Electricity Lightning Electricity HVAC Cooling Heat Final Energy

13 5a) HVAC systems for office buildings in the Zurich State in Switzerland Measured performances of 20 office buildings in the State of Zurich 60% with Minergie Label (energy efficiency Swiss national label) Study realised jointly by Forum energie zürich GP Gruenberg + Partner AG Under contract from City of Zurich State of Zurich Typology A) 8 with slab heating and cooling B) 7 with heating convectors and cooling radiant panels C) 3 with detached radiant panels D) 2 with facade systems

14 5b) A) Centralised ventilation with heat recovery, Slab heating and cooling External movable lamella blinds

15 5f) Average measured energy consumption 20 office buildings 60% with Minergie label Measured Energy Performance Index (EPI) for HVAC (kwh/m2-annum) Heating Electricity for cooling Electricity for mechanical ventilation Total HVAC

16 6a) Unibail-Rodamco Courcellor 1 (Paris) m 2, 17 floors, handing over in June 2015 Re-built, enlarged New façade For rental by floor

17 6b) Unibail-Rodamco Courcellor 1, handed over june 2015 Natural ventilation (optional) Mechanical ventilation with chilled beams Integrated lamella blinds

18 6c) Unibail-Rodamco Courcellor 1, handed over june 2015 Labelled BREEAM Completely equipped floors False ceilings With integrated chilled beams luminaires

19 From Europe to Singapore Heating Similar conditions as warm and humid climates of India

20 7a) Data from 350 buildings in Singapore

21 7b) Green buildings performance as compared to non «green» buildings Green and nongreen buildings Small difference between the two categories

22 7c) Building and Construction Authority Zero Energy Building, Singapore 4500 m2 Office building, built in 2009 Architect: DP Architects Features: Façade: Double glazed units with blinds inside Electro-chromic glass (glass which changes opacity depending on solar radiation) Daylight enters deep into the space reducing the amount artificial lighting required. Shallow floorplate Lightpipes, mirror ducts Light shelves Solar PV panels on roof and façade Solar panels for hot water productionn Solar chimneys Solar protection shading devices Green roof and green wall Natural ventilation Energy Performance Index: 41 kwh/m2/year (final energy) Primary Energy Performance Index: 82 kwh/m2/year Energy prodution on site: 44 kwh/m2/year (final)

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24 Trends on EPI (kwh/m 2 -yr) Energy management and optimisation Energy wastage? kwh/m2 heating Complex technology 98 kwh/m2-yr electricity Good solar Reduced protection, window to Freecooling, wall ratio Solar Passive protection features, Heat Evaporative recovery cooling Radiant cooling % lowest 116 Net zero energy Prototype Future 41 0

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