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%