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TRANSCRIPT
NTU Learning Hub
Green Mark Presentation
18 February 2013
OUTLINE:
1 Project Brief
2 Green Design Approaches
3 Design for Sustainability - Passive and Active Design
4 Water Conservation Strategies
5 Environmental Protection Strategies
6 Green Innovation Strategies
Developer
Nanyang Technological University
Architect
CPG Consultants Pte Ltd
Design Consultant
Heatherwick Studio
Landscape Architect
Perfect Sense
ESD Consultant
CPG Consultants Pte Ltd - CPGreen
Civil & Structural Engineer
T Y Lin International Pte Ltd
Quantity Surveyor Consultant
Davis Langdon KPK (Singapore) Pte Ltd M&E Engineer
Bescon Consulting Engineers Pte
Fire Consultant
LKH Fire Engineering Pte Ltd
Acoustic Consultant
CCW Associates Pte Ltd
Specialist Consultant (Induction Cooling)
ME(TCS) Consulting Engineers
Project
Brief
Project Team Members:
Project
Brief
New Generation Classrooms
• Interactive small group teaching
• Active Learning
• Tutorial rooms will be stacked into
towers
Shared Circulation and Atrium • 24 hr-centre
• Formal and informal activities
Roof Top Greenery
• Gathering place for leisure and
relaxation
• Beautifying of environment
Restaurant
• Eating outlet at 1st storey
Site
HSS
Green Design
Approaches
Day lighting to supplement
lighting levels in the Atrium
Harnessing Daylight
The building form is designed to
incorporate passive environmental
features such as the provision of
self-shading, natural light and good
window-to-wall ratio (for tutorial
rooms).
Self-shading
building form Balcony
between
pods
Self-shading
building form
Good
window-to-
wall ratio
Open First
Storey
Balcony
between
pods
Natural-lit
atrium and
corridors
Passive Displacement
Ventilation Green Sensibility
Green Design
Approaches
Optimize energy saving in the
tutorial rooms
Maximize “green footprint”
By landscaping;
vertical green as means to
reduce glare & heat gain
Façade System:
Use of better glass to enhance thermal
comfort in the building
Concrete wall with 300mm thick window
Strip at the top
Recessed lower floors are shaded by
floors above
Skylight, balconies and roof terraces allow
natural light into the atrium
Use of internal vertical greening and roof
top greenery to further reduce the ETTV
Facade-
Enhancing thermal comfort
Design for
Sustainability
Passive design
Glass Material:
Designed to achieve ETTV of 39.75 W/m2
WWR ratio of 42.47%
Internal Glass (Facing Atrium)
Shading Coefficient of 0.196
External Glass (300mm window)
Low E-Glass (6mm thk)
Design for
Sustainability
Vertical greenery in Atrium provide a
cooler semi-outdoor environment for
heat reduction
Naturally Ventilated Common Areas in
Atrium, Staircases, Corridors, Lift
Lobbies
Skylight, balconies and roof terraces
allow natural light into the atrium
Passive design
Energy Management Strategies
Chiller
Pumps and Cooling Towers
Energy Efficient Chiller Plant System -
0.586kW/RT Plant
Equipped with variable speed control
Passive Displacement
Ventilation
Space cooling through convection
flows of heat exchanges with no fan
required
System
Design for
Sustainability
Active design
CO2 sensor CO2 sensor to regulate outdoor air
supply to the building
Chiller 0.495 kW/RT
CHWP 0.024 kW/RT
CNWP+CT 0.067 kW/RT
Chiller Configuration –
1 x 550 RT VSD Screw Chiller
Passive Displacement Ventilation
Application All Tutorial Rooms, Writing
Centre and Library
Reduce structural and
material cost
Reduce noise level
Good thermal comfort
Better RH control
Energy Saving Air distribution saving of
86.15%
Benefits
0
50
100
150
200
250
300
350
400
450
500
550
Chiller Plant Cooling Load (RT)
NTU LH Building Load(RT)HSS Building Load(RT)
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1NTU LH Chiller Plant Efficiency (kW/RT)
NTU LH Chiller PlantEfficiency (kW/RT)
Light Fittings
Design Strategy
Operational Strategy
Optimization of day lighting and
use of energy efficient light
fittings.
Lighting by zones complete with
manual switches to override
lighting needs based on user
requirements
Motion sensor control A/C and
lighting to prevent unnecessary
wastage at night
Use of T5 and PLC energy efficient
light fittings with high frequency
ballast
Motion sensor for toilets, tutorial
rooms and staircases
Lighting Strategies
Design for
Sustainability
Active design
Day lighting Optimization of day lighting at
the Atrium through the use of
skylight
Energy
Modeling
Results
Total Saving 30.1%
GFA (m2) 14,555
Normalised EEI 67.89 108.57
Description of Energy Systems
Proposed Model Base Model
Energy Savings
Remarks
Energy Consumption
(kWh/year)
Energy Consumption
(kWh/year)
Chillers* 346,356 587,449 41.0% 1 nos. scew type 550RT COP 6.9, Baseline COP 5.5
CHWP* 16,878 38,536 56.2% Baseline 0.053kW/RT, VSD
Heat Rejection (CNWP+CT)* 45,609 84,313 45.9% Baseline 0.057kW/RT for CNWP, 0.051kW/RT for CT. pumps 3% additional to infinity law during
part-load, CT fans part-load refer to ASHRAE 90.1
South Spine Chiller Plant
(night load) 42,064 84,077 50.0%
Serve night load from 8:00pm-8:30am, Propose uses measured chiller plant COP 4.82, Baseline
COP4.39
PDV - 93,483 100.0% Propose 0W/CMH, Baseline 0.67W/CMH for AHU fans >4kW, 0.17W/CMH for AHU fans <4kW
FAF 12,396 21,367 42.0% Propose PDV with fresh air control by CO2 concentration, Baseline AHU with constent fresh air
FCU 4,079 4,079 0.0% Baseline 0.17W/CMH for FCU fans <4kW
VRV 252,995 317,424 20.3% Serve LAN room 24/7/52
Lightings 241,949 342,414 29.3% Propose typical space ave. 10W/m2 with motion sensor, Baseline 15W/m2
MV Fan 12,457 12,457 0.0% Baseline 0.17W/CMH for MV fans <4kW
Lift 19,165 21,294 10.0% VVVF & Sleep Mode
Server load 254,191 254,191 0.0% 24/7/52, w/ 0.53 diversity factor
Receptacle load 174,404 174,404 0.0% Propose typical space ave. 20W/m2
Total Consumption 1,422,543 2,035,489 30.1%
* NTU LH chiller plant serve both LH & HSS until 8:00pm, night load afterwards will be served by NTU South Spine
chiller plant
Water saving through the use of
excellent WELS Rated Fittings
Use of polymer to increase soil
absorption and distribution of
moisture to eliminate the need for
irrigation system
Hydrophylic Polymer
WELS Rated Fittings
Water Conservation Strategies
Water Metering Water sub-metering to major
water uses. All sub-meters are
linked to the BMS System
Water Treatment for Cooling Tower
Designed to achieve 7 or more
cycles of concentration at
acceptable water quality
Extensive use of SGLS Rated Green Products
RECYCLED CARPET RAISED FLOOR SYSTEM
TIMBER DECK DRYWALL PARTITIONS WATERPROOFING
Used for Planter
Terrace
Used in
Lan Room
All external
areas and
internal wet
spaces
Used in Lecture
Theatre, Library
and Writing
Centre
Used in Tutorial
Rooms, Library and
Lecture Theatre
Environmental Protection Strategies
*Building is design to minimum use of finishes/ processed product
Environmentally Friendly
Transportation Modes
Refrigerant R134a with ozone depletion potential
of zero or with global warming
potential of less than 100
Public transportation
Sustainable Operation and Management
Building User Guide, recycling
facilities and environmental friendly
programes during construction
Greenery Lush landscape greenery, internal
vertical greenery and roof top garden
Environmental Protection Strategies
Green Innovation Strategies
Clashing detection from BIM Models
from different disciplines:
Green Innovation Strategies
BIM generated tabulation of building
elements and concrete volume
calculation:
- Window Schedule
- Wall Schedule
- Concrete Volume Calculation
Green Innovation Strategies - Passive Displacement Ventilation
PDV relies on natural convection of heat
transfer without the need for supplementary
mechanical fans to deliver the chilled air to
the end user.
By taking advantage of the natural buoyancy
of warm air, stratification is achieved across
the height of the room.
Due to the relatively low velocity of the supply
air, undesirable draft is eliminated, leading to
greater occupant comfort.
Acoustics standard greatly enhanced, un-
matched by conventional systems with
mechanical fans.
The interior of the tutorial
rooms is conceived as
having minimal or no
finishes to reduce the usage
of coatings or covering
products that need to be
replaced, thereby reducing
waste.
No Ceiling
Bare Finish
Concrete
Column
Bare
Screed
Flooring
Green Innovation Strategies
Thank You Presented by:
58.60 38.45 TOTAL 97.05
Green Mark
Try Again
Certified Gold GoldPlus Platinum
Score 0 49 50 74 75 84 85 89 90 100
(Energy Saving = 30.10%)
1. ENERGY EFFICIENCY 58.60
2. WATER EFFICIENCY 11.20
3. ENVIRONMENTAL PROTECTION 21.25
4. INDOOR ENV. QUALITY 5.00
5. OTHER GREEN FEATURES 1.00
Green Mark Scoring Summary
Platinum
(Energy Saving = 30.10%)
BCA Green Mark Version 4.0 Allocation Scored
Part 1 - Energy Efficiency
1-1 Building Envelope – ETTV 12 12
1-2 Air-Conditioning System 30 30
(Total 1-1 to 1-2) 42 42
1-3 Building Envelope – Design/Thermal Parameters 35 0
1-4 Natural Ventilation (exclude carparks) 20 0
(Total 1-3 to 1-4) 55 0
1-5 Day Lighting 6 0
1-6 Artificial Lighting 12 6.6
1-7 Ventilation in Car parks 4 0
1-8 Ventilation in Common Areas 5 5
1-9 Lifts and Escalators 2 1
1-10 Energy Efficient Practices & Features 12 4
1-11 Renewable Energy 20 0
(Total 1-5 to 1-11) 61 16.6
Category Score for part 1 - Energy Efficiency
Prorate Subtotal (A) + Prorate Subtotal (B) + Subtotal (C) 158 58.6
TOTAL (ENERGY) including BONUS = 116(Max) 58.6
Allocation Scored
Part 2 - Water Efficiency 2-1 Water Efficient Fittings 10 7.2 2-2 Water Usage and Leak Detection 2 2 2-3 Irrigation System 3 1
2-4 Water Consumption of Cooling Tower 2 1
(Category Score Part 2) 17 11.2
Part 3 – Environmental Protection 3-1 Sustainable Construction 10 5
3-2 Sustainable Products 8 3 3-3 Green Provision 8 5 3-4 Environmental Management Practice 7 5.25 3-5 Green Transport 4 1
3-6 Refrigerants 2 2
3-7 Storm Water Management 3 0
(Category Score Part 3) 42 21.25
Part 4 - Indoor Environmental Quality 4-1 Thermal Comfort 1 1
4-2 Noise Level 1 1
4-3 Indoor Air Pollutants 2 0
4-4 Indoor Air Quality (IAQ) Management 2 1 4-5 High Frequency Ballasts 2 2
(Category Score Part 4) 8 5
Part 5 – Other Green Features 5-1 Green Features and Innovations 7 1
(Category Score Part 5) 7 1
TOTAL (OTHERS)= 38.45
TOTAL (ENERGY + OTHERS) ESTIMATED SCORE = (190 max) 97.05
Green Mark Detailed Scoring
Energy
Modeling
Results All 11 AHUs assume
baseline 0.67 W/CMH
Total Saving 30.3%