Sino-Italian Environment & Energy BuildingS I E E B

MOSTMinistry of Science and Technology

Republic of China

The Sino-Italy Environment & Energy Building (SIEEB) is an intelligent, ecological and energy-efficient building: a model for a new generation of sustainable buildings.

Function: education, office and researchSite: Tsinghua University campusSite area: 3,640 m2

Building area: 20,000 m2

Building height: 40 m

Concept

Features•high energy efficiency •renewable energy use•low CO2 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 DesignProject leader: Federico Butera, BEST

Architectural Design: MCA Mario Cucinella Architects

Ettore Zambelli, BEST

Engineering: China Architecture Design & Research GroupFavero & Milan Ingegneria

Building simulation:Envelope technologies:HVAC simulation:Energy analysis:

S. Ferrari, U. Beneventano N. Aste (Dipartimento di Energetica)

P. Oliaro, R. AdhikariP. Caputo

BEST Work Team

In collaboration with Tsinghua University

Advanced Engineering energy systems

AIACE S.r.l. architectural design

Dipartimento di Energetica, Politecnico di Milanodaylighting, PV systems

ENEAcontrol systems

PERMASTEELISA envelope technologies

Studio Finzistructures

Consultants

Design Methodology

Beijing climate analysisMonthly Mean Daily Global Solar Radiation

2.5

3.5

4.45.0

6.2

7.6

5.5

4.6

3.54.1

2.61.8

3.84.6

6.47.0

9.19.5

8.07.3

6.05.4

4.0

2.9

0

1

2

3

4

5

6

7

8

9

10

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Month

I (kW

h/ m

2 da

y)

avg max

Monthly Avergae Ambient Temperature

-4.0 -3.9

5.0

14.2

20.823.7

26.4 24.921.2

11.2

2.4-0.20.9 0.5

10.7

21.5

28.1 29.5 31.028.8

26.7

16.9

6.94.2

-9.1 -8.5

-0.8

6.8

13.2

17.4

21.4 20.9

15.7

5.6

-2.2-4.7

-15

-10

-5

0

5

10

15

20

25

30

35

Jan Feb Mar Apr May June Jul Aug Sep Oct Nov Dec

Month

Tem

pera

ture

(°C

)

avg max min

Monthly Mean Relative Humidity

30

38

2934

46

7579

62

5345

38

50

5951

64

76

96 96

8879

6660

12 1510 11

19

5057

39

21 20 18

0

20

40

60

80

100

120

Jan Feb Mar Apr Jun Jul Aug Sep Oct Nov Dec

RH (%

)

avg max min

Winter:very cold

Solar radiation:high in summer

Summer:very hot and humid

Shape analysis

0 1

2 3

4 5

Shadows (21st March)

21st march

Shadows analysis

Solar energy (average winter day)

6.3

5.34.9

5.65.9

5.05.2

4.75.2

4.85.0 4.9

0.0

1.0

2.0

3.0

4.0

5.0

6.0

7.0

0 1 2 3 4 5

Shape

MJ/

m2 EtEv

Shapescomparisoncriteria:•max solar energy in winter•min solar energy in summer

Solar energy (average summer day)

9.7

8.7 8.38.8 8.7

8.0

6.7 6.6 6.7 6.76.2

6.6

0.0

2.0

4.0

6.0

8.0

10.0

12.0

0 1 2 3 4 5

Shape

MJ/

m2 Et

Ev

The best shape

First design stage

Computer simulations

Electricity78%

Fuel22%Lighting

34%

Cooling24%

Equipment21%

Ventil. fans13%

Miscell.8%

Cooling42%

Lighting & Equip.

36%

Heating22%

•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

Needs

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 artificiallighting systems

Lightshelf Lamellas

Daylighting devices

Reduction of electricity demand frompumps and fans

Radiant ceilings and displacement ventilation

Sun control & natural lighting

Displacement ventilation & radiantceilings

High efficiency artificial lighting & dimming

Strategies adopted

Electricuses

Electric grid

Compression chiller

Boiler Base Case (conventional)

Electric grid

Compression chiller

BoilerImproved (all strategies)

summer

winter

0102030405060708090

100

%

Cooling Heating Lighting &Equip.

Base caseImproved

Reduction of energy demand

Electric grid

CHP units Compression chillers

Absorbtion chillers

Back up boiler

summer

winter

Optimised

0

1000

2000

3000

4000

5000

6000

MW

h

Base case Optimised

Primary energy consumption

Architecture

WinterSunny day

SummerSunny day

Summer and winterovercast day

Semi-reflecting glass louvers

WinterSunny day

SummerSunny day

Summer and winterovercast day

Perforated reflecting lamellas

Electric grid

CHP units Compression chillers

Absorbtion chillers

Back up boiler Control System

Outdoorconditions

CO2 Emissions

Compared with current building design, SIEEB can save more than 1,000 tons of CO2 per year

0200400600800

1000120014001600

tCO

2/ye

ar

Base case Optimised