Sino-Italian Environment & Energy Building S I E E B

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1 MOST Ministry of Science and Technology Republic of China Sino-Italian Environment & Energy Building S I E E B

2 Concept The Sino-Italy Environment & Energy Building (SIEEB) is an intelligent, ecological and energyefficient building: a model for a new generation of sustainable buildings. Function: education, office and research Site: Tsinghua University campus Site area: 3,640 m 2 Building area: 20,000 m 2 Building height: 40 m

3 Features high energy efficiency renewable energy use low CO 2 emissions resources saving including construction materials minimum environmental impact in construction and use intelligent control during operation and maintenance healthy indoor air environmentally sound and durable materials water recycling and re-use

4 The site

5 Project Building Design Project leader: Architectural Design: Federico Butera, BEST MCA Mario Cucinella Architects Ettore Zambelli, BEST Engineering: China Architecture Design & Research Group Favero & Milan Ingegneria

6 BEST Work Team Building simulation: Envelope technologies: HVAC simulation: Energy analysis: S. Ferrari, U. Beneventano N. Aste (Dipartimento di Energetica) P. Oliaro, R. Adhikari P. Caputo In collaboration with Tsinghua University

7 Consultants Advanced Engineering energy systems AIACE S.r.l. architectural design Dipartimento di Energetica, Politecnico di Milano daylighting, PV systems ENEA control systems PERMASTEELISA envelope technologies Studio Finzi structures

8 Design Methodology

9 Beijing climate analysis Monthly Mean Daily Global Solar Radiation I (kwh/ m2 day) Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Month Solar radiation: high in summer avg max Monthly Avergae Ambient Temperature Temperature ( C) Jan Feb Mar -0.8 Apr May June Jul Aug Sep Oct Nov -2.2 Dec Month avg max min Winter: very cold Monthly Mean Relative Humidity RH (%) Summer: very hot and humid Jan Feb Mar Apr Jun Jul Aug Sep Oct Nov Dec avg max min

10 Shape analysis

11 Shadows analysis hadows (21 st March) 21st march

12 MJ/m Solar energy (average winter day) Shape Et Ev Shapes comparison criteria: max solar energy in winter min solar energy in summer Solar energy (average summer day) 12.0 The best shape MJ/m Et Ev Shape

13 First design stage

14 Computer simulations Heating 22% Cooling 42% Lighting & Equip. 36% Ventil. fans 13% Miscell. 8% Lighting 34% Fuel 22% Equipment 21% Cooling 24% Electricity 78%

15 Needs reduce heating and cooling load minimise electricity consumption due to artificial lighting minimise the electricity demand of the HVAC system cover as much as possible the electricity demand of the building by means of cleaner production systems

16 Reduction of heating and cooling load low U value for walls and glazing mobile louvers for enhancing solar gains in winter and solar protections in summer

17 Enhancement of natural lighting

18 Enhancement of natural lighting Combined with high efficiency artificial lighting systems

19 Daylighting devices Lightshelf Lamellas

20 Reduction of electricity demand from pumps and fans Radiant ceilings and displacement ventilation

21 Strategies adopted Sun control & natural lighting Displacement ventilation & radiant ceilings High efficiency artificial lighting & dimming

22 Electric grid Electric uses Compression chiller Boiler Base Case (conventional)

23 Electric grid Compression chiller summer winter Boiler Improved (all strategies)

24 Reduction of energy demand Cooling Heating Lighting & Equip. Base case Improved

25 Electric grid CHP units Compression chillers summer Absorbtion chillers winter Back up boiler Optimised

26 Primary energy consumption MWh Base case Optimised

27 Architecture

28

29

30

31

32

33 Semi-reflecting glass louvers Winter Sunny day Summer Sunny day Summer and winter overcast day

34 Perforated reflecting lamellas Winter Sunny day Summer Sunny day Summer and winter overcast day

35 Electric grid Outdoor conditions CHP units Compression chillers Absorbtion chillers Back up boiler Control System

36

37

38 CO 2 Emissions tco2/year Base case Optimised Compared with current building design, SIEEB can save more than 1,000 tons of CO 2 per year

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