scientific planning and support for high …cleantech two: first of its kind in singapore 3...
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SCIENTIFIC PLANNING AND SUPPORT FOR HIGH PERFORMANCE BUILDING DESIGN:
A CASE STUDY OF CLEANTECH TWO
BHARATH SESHADRI SUSTAINABLE BUILDING TECHNOLOGIES ENERGY RESEARCH INSTITUTE @ NTU
Image courtesy of Jurong Consultants Pvt Ltd
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Official opening: 15 June 2010 17 Commercial Partnerships 3 Joint Industry Programs 6 Joint International University
partnerships 9 dedicated laboratories 65 Principal Investigators 106 Ph.D. & Masters students 158 Researchers
INTRODUCTION TO ERI@N
Energy Research Institute @ NTU
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CLEANTECH TWO: FIRST OF ITS KIND IN
SINGAPORE
3
Laboratory intensive
Multi-tenanted
25,000 sqm
@CleanTech Park: Singapore’s first eco-business park
Designed through Scientific Planning and Support (SPS) process to achieve high energy performance
Image courtesy of Jurong Consultants Pvt Ltd
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Develop integrated design process
involving all major stakeholders
Help define and develop a cost-effective sustainable building design
Validate system performances through
Modelling and Simulations
Calculate life-cycle costs for innovative technologies
SCIENTIFIC PLANNING AND SUPPORT
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CLEANTECH TWO TEAM
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THE SPS TEAM
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Local relevance & expertise Capability Building Project Management
Track record of expertise in integrated design process
Innovative concepts from United States
Energy Research Institute @ NTU
Austrian Institute of Technology
Nanyang Technological
University
Lawrence Berkeley National
Lab
Local expertise Capability Building Project Management
Track record of expertise in integrated design
Innovative ideas and concepts from USA
Building Modeling and Simulation expertise
Innovative ideas and concepts from Europe
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HIGHLIGHTS OF THE DESIGN PROCESS
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THE INTEGRATED DESIGN CHARRETTE
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THE INTEGRATED DESIGN CHARRETTE
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PASSIVE AND ACTIVE DESIGN
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AC
MV
Lighting & Controls
Enve
lop
Sys
tem
s
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MODELING AND SIMULATION
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INTEGRATED BUILDING DESIGN
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INNOVATIVE TECHNOLOGIES IN CLEANTECH TWO
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ENERGY BREAKDOWN FOR LAB SPACES
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0%
5%
10%
15%
20%
25%
30%
35%
40%
45%
COOLING FANS LIGHTS EQUIPMENT
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LIQUID DESICCANT DE-HUMIDIFICATION
15 DUCOOL, 2011
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LIQUID DESICCANT DE-HUMIDIFICATION: RESULTS
6-8 ACH: >50% of cooling and fan energy was used for providing for conditioned fresh air
Air is dehumidified by a liquid desiccant
The liquid desiccant was “regenerated” using a solar thermal collector
The solar powered L-DEC system results in a 45% improvement in cooling efficiency
16 NEA, 2009
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THERMAL STORAGE
17 PCM PRODUCTS, 2012
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THERMAL STORAGE: SHIFTING OF PEAK LOADS
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0
50
100
150
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250
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700
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1,000
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
CO
OLI
NG
DEM
AN
D (
RT)
HOUR OF DAY
W/O THERMAL STORAGE
W/ THERMAL STORAGE
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THERMAL STORAGE: RESULTS
Thermal Storage to optimize efficiency of the chiller
‘Charged’ and ‘discharged’ during off-peak and on-peak hours
‘Peak shaving’ of the building cooling demand
25% (off-peak) and 4% (on-peak) improvement
in cooling efficiency
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STRATIFIED COOLING
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12m
3.5m
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STRATIFIED COOLING
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STRATIFIED COOLING
• Only provide cooling to the bottom occupied portion of high-ceiling spaces
• Temperature and humidity in the upper portion allowed to ‘float’.
• Reduced the cooling demand by 15% while maintaining comfort levels for all occupants.
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THE GREEN LEASE
Item Improvement*
AHU Fan Power 20 %
Lighting Power Density 30 %
Day lighting Compulsory
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“….mandatory agreement on key energy systems adoption by tenants, to ensure responsible and energy efficient operation by all tenants.”
*Over the compliance standard
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HIGH PERFORMANCE LABORATORY RECOMMENDATIONS
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FLOOR PLAN FOR FITTED LAB SPACE
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1000m2 Fitted Lab Spaces (Level 6, CleanTech Two) N
Image courtesy of Jurong Consultants Pvt Ltd
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STATE-OF-ART FITTED LAB CONCEPT
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1
2
3 4
5
6
6
1: Low Energy Fume-hood with Sash control 2: BMS with IAQ Dashboard 3: Demand Control Ventilation interfacing with IAQ Dashboard 4: Supply Air damper 5: Exhaust Air damper 6: ON/OFF Switch
Image courtesy of Waldner, Germany
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PASSIVE CHILLED CEILING SYSTEM
Benefits: Lower air change rates Higher efficiency chiller Smaller ducts Lower ceiling height Lesser cold drafts, air-flow noise and overall greater indoor thermal comfort Energy Saving Potential: Fan energy is reduced by 75% and the overall energy consumption of the HVAC system is reduced by 45% (ECOPHIT Installation, Germany)
27 0
20,000
40,000
60,000
80,000
100,000
KW
H
EQUIPMENT LIGHTING COOLING AIR FANS CHILLED CEILING PUMPS
- 24 %
- 39 %
VAV SYSTEM CHILLED CEILING
- 26 %
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WIRELESS SENSOR NETWORK
Benefits:
Personalized behavior-based control system
Lesser wiring and maintenance
High energy efficiency (lighting, and ventilation)
Greater indoor comfort
Energy Saving Potential:
According to ORNL, through the use
of wireless sensor networks, savings
on energy for motors used in
industrial processes could improve
efficiency by 20%
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DC-DC GRID
Benefits:
DC power delivery may enhance micro-grid system integration, operation
DC suffers low voltage losses
Power conversion within the appliance can be avoided, and losses reduced
Energy Saving Potential:
Expected 20-30% electricity savings
effect of using direct DC powering,
and adequate controls scheme
29 Image courtesy of eMerge Alliance
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LOW ENERGY FUMEHOOD
Benefits: Simple design with reduction in
airflow requirements by 50 to 70%
Improves user safety Reduction in energy use as well
as size of the mechanical systems required to provide adequate ACMV
New design reduces the flow up to 30% when compared to typical hood installation
New hood design also reduces lighting energy in order of 47%
Berkeley Lab’s High Performance Fumehood being tested by LBNL (now commercially available)
Image courtesy of Lawrence Berkeley National Lab, USA
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IAQ DASHBOARD
Benefits:
Reduce the levels of indoor air pollutants
Provide and maintain adequate airflow
Respond to IAQ‐related concerns and problems in a prompt and thorough manner
Best to be implemented in places that require high indoor air quality without compromising thermal comfort
Image courtesy OF Air Advice, USA
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LIST OF TECH RECOMMENDATIONS
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ACMV
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Technology Recommended Decision
Best Efficiency Chiller Plant √
Optimized Operation using Thermal Storage √
Solar Thermal Liquid Desiccant system √
Demand Control Ventilation √
Indoor Air Quality Dashboard √
Low Energy Fume hoods √
Stratified Cooling √
Dedicated Outdoor Air System X
Radiant Cooling X
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ACMV
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Technology Recommended Decision
Day Lighting Controls √
LED Lighting √
Smart Parking Luminaires √
Solar Light Tubes X
Automated Dimmable Ballasts X
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PASSIVE DESIGN AND CONTROLS
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Technology Recommended Decision
Low Heat-Transfer Windows √
Green Walls √
Solar PV & Thermal System √
Automated Shading X
Reflective Coating X
DC-Powered Wireless Sensor Network X
Neuro Predicted Mean Vote for ACMV X
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ENERGY SAVINGS = 32.8%
36 0
500,000
1,000,000
1,500,000
2,000,000
2,500,000
3,000,000
Lighting (AC Spaces) Lighting (Non-ACSpaces)
Chiller Plant Air System Fans MV Fans Lifts ReceptacleEquipment
STANDARD DESIGN CLEANTECH TWO
72%
35%
55%
43%
30%
10%
0%
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CO-AUTHORS
Nanyang Technological University
JTC Jurong Consultants
Nilesh Y. Jadhav Ng Kian Wee Dr. Uma Maheswaran
Majid Bin Haji Sapar
Aaron P. Boranian
Danielle M. Griego
Austrian Institute of Technology
Lawrence Berkeley National Laboratory
Markus Brychta Reshma Singh
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THANK YOU Image courtesy of Jurong Consultants Pvt Ltd