MOST Ministry of Science and Technology Republic of China Sino-Italian Environment & Energy Building S I E E B
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
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
The site
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
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
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
Design Methodology
Beijing climate analysis Monthly Mean Daily Global Solar Radiation I (kwh/ m2 day) 10 9 8 7 6 5 4 3 2 1 0 9.5 9.1 8.0 7.0 7.6 7.3 6.4 6.2 6.0 5.5 5.0 4.6 4.4 4.6 3.8 3.5 3.5 5.4 4.1 4.0 2.5 2.6 2.9 1.8 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) 35 30 25 20 15 10 5 0-5 -10-15 28.1 31.0 29.5 28.8 26.4 24.9 23.7 26.7 21.5 20.8 21.4 20.9 21.2 14.2 17.4 15.7 16.9 13.2 10.7 11.2 6.8 6.9 5.0 5.6 4.2 2.4 0.9 0.5-0.2 Jan Feb Mar -0.8 Apr May June Jul Aug Sep Oct Nov -2.2 Dec -4.0-3.9-4.7-9.1-8.5 Month avg max min Winter: very cold Monthly Mean Relative Humidity RH (%) 120 100 80 60 40 30 50 38 59 51 29 64 34 46 76 96 96 79 75 57 50 62 88 39 79 53 66 45 60 38 Summer: very hot and humid 20 12 15 10 11 19 21 20 18 0 Jan Feb Mar Apr Jun Jul Aug Sep Oct Nov Dec avg max min
Shape analysis 4 5 0 1 2 3
Shadows analysis hadows (21 st March) 21st march
MJ/m2 7.0 6.0 5.0 4.0 3.0 2.0 1.0 0.0 Solar energy (average winter day) 6.3 5.9 5.6 5.2 5.3 5.2 4.9 4.7 4.8 5.0 5.0 4.9 0 1 2 3 4 5 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/m2 10.0 8.0 6.0 9.7 8.7 8.8 8.7 8.3 6.7 6.6 6.7 6.7 6.2 8.0 6.6 Et Ev 4.0 2.0 0.0 0 1 2 3 4 5 Shape
First design stage
Computer simulations Heating 22% Cooling 42% Lighting & Equip. 36% Ventil. fans 13% Miscell. 8% Lighting 34% Fuel 22% Equipment 21% Cooling 24% Electricity 78%
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
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
Enhancement of natural lighting
Enhancement of natural lighting Combined with high efficiency artificial lighting systems
Daylighting devices Lightshelf Lamellas
Reduction of electricity demand from pumps and fans Radiant ceilings and displacement ventilation
Strategies adopted Sun control & natural lighting Displacement ventilation & radiant ceilings High efficiency artificial lighting & dimming
Electric grid Electric uses Compression chiller Boiler Base Case (conventional)
Electric grid Compression chiller summer winter Boiler Improved (all strategies)
Reduction of energy demand 100 90 80 70 60 50 40 30 20 10 0 Cooling Heating Lighting & Equip. Base case Improved
Electric grid CHP units Compression chillers summer Absorbtion chillers winter Back up boiler Optimised
Primary energy consumption 6000 5000 4000 MWh 3000 2000 1000 0 Base case Optimised
Architecture
Semi-reflecting glass louvers Winter Sunny day Summer Sunny day Summer and winter overcast day
Perforated reflecting lamellas Winter Sunny day Summer Sunny day Summer and winter overcast day
Electric grid Outdoor conditions CHP units Compression chillers Absorbtion chillers Back up boiler Control System
CO 2 Emissions tco2/year 1600 1400 1200 1000 800 600 400 200 0 Base case Optimised Compared with current building design, SIEEB can save more than 1,000 tons of CO 2 per year