清华大学建筑设计院绿色建筑节能楼详细介绍LOWenergybuilding

pivotal technologies of green building
Assessment system for Green Building of Beijing Olympic,
published in Aug. 2003
1
Low Energy Demo (LED) Building
Tsinghua Green Building research center
PV panel
PV panel
5
Summer status
East DSF
U=1.0 W/m2K SHGC<0.1
South DSF
U=1.28 W/m2K SHGC<0.1
PV panel
6
Daylight utilization system
Basement
7
Natural ventilation
13
Outdoor air handling Unit (dehumidifier)
30.7 ºC 26.7 g/kg
28.3 ºC 21.5 g/kg
26.8 ºC 16.9 g/kg
26.0 ºC 11.5 g/kg
Exhaust air
35.0 ºC 20.0 g/kg Outdoor air
0.5
-0.4
-0.4 -0.2
0
0.2 0.4 0.6 0.8
1
1.2 1.4
a(i)
0
Natural wind
-0.5
a(i+r)
-1
-1.5
-1.5
-1
-0.5
0
0.5
1
11
Subject experiment
Vote to different air flows
Satisfaction Vote
A workbench for
GOBAS Research on the
pivotal technologies of green building
Location: Tsinghua Campus
Floor area: 2920 m2
4-story overground, 1-story basement
10
Chaos & Fractal Phenomenon Analysis =B/L
——Phase space reconstruction y
L
rearragement 2-D
1.4
B
1.2
1
Buoyancy air flow
0.8
x
0.6
0.4
Mechanical wind
0.2
1
0
-0.2
floor
PCM
Tfloor
Temp
Tout
Tin without PCM Tin with PCM Qsolar
9
HVAC System: Office
1 Cool ceiling: no dehumidification, 18C water 2 Task air-condition: natural wind emulator 3 Floor displacement ventilation: dried fresh air
Plate HX
33.3 ºC 14.7 g/kg
30.9 ºC 10.7 g/kg
28.6 ºC 7.9 g/kg Heat
EX
22.2 ºC 7.9 g/kg Supplied air
Diluted solution, 46.6% Concentrated solution, 51.4%
Steady Sinusoid Simulated Stochastic natural wind
12
New Air handling method
Independent humidity control
New brine system with high efficiency
Solar heat will be the driving power
BACKGROUND: Green Olympic Building Assessment System (GOBAS)
Sponsored by Ministry of Science & Technology (MST) for Olympic 2008
Tsinghua Univ. and other 8 institutes were involved
▼ Utilize natural ventilation based the around situation
Stack ventilation
▲ Zonal ventilation design
Pressure distribution around the building
8
Shape stabilized phase change material used in rising floor
Office building
School of Architecture
2
facade
PCM heat storage floor
3
Energy performance of fabrics
DeST
Average Heating load in Jan. 2.3W/m2
Cooling load: Average 5.2W/m2, Max. 12.8W/m2
4
Adjustable External Shading
Winter status
View & shading
PV panel
Size of louvers : Length Width Distan源自文库e between louvers
3.0 m 0.6 m 0.6 m
The horizontal louvers can be controlled independently to meet the different purposes, which including daylight, view and solar energy collection, along vertical direction.
Collaborated with CASBEE (Japan) and LEED(USA)
A prototype of Chinese Green Building assessment system
Followed-up by another project
sponsored by MST Research on the