NTU Learning Hub. Green Mark Presentation 18 February 2013

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Joshua Simon Newton
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1 NTU Learning Hub Green Mark Presentation 18 February 2013

2 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

3 Project Brief Project Team Members: 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

4 Project Brief New Generation Classrooms Interactive small group teaching Active Learning HSS Tutorial rooms will be stacked into towers Site 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 1 st storey

Green Design Approaches 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

5 Green Design Approaches 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). Balcony between pods Natural-lit atrium and corridors Harnessing Daylight Day lighting to supplement lighting levels in the Atrium Good window-towall ratio Self-shading building form Balcony between pods Open First Storey Self-shading building form

means to reduce glare & heat gain Passive

6 Green Design Approaches Green Sensibility Maximize green footprint By landscaping; vertical green as means to reduce glare & heat gain Passive Displacement Ventilation Optimize energy saving in the tutorial rooms

7 Facade- Enhancing thermal comfort 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 Glass Material: Passive design Design for Sustainability Designed to achieve ETTV of W/m 2 WWR ratio of 42.47% Internal Glass (Facing Atrium) Shading Coefficient of External Glass (300mm window) Low E-Glass (6mm thk)

8 Passive design 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

9 Active design Design for Sustainability Energy Management Strategies System Chiller Energy Efficient Chiller Plant System kW/RT Plant Chiller kw/rt CHWP kw/rt CNWP+CT kw/rt Chiller Configuration 1 x 550 RT VSD Screw Chiller Pumps and Cooling Towers Passive Displacement Ventilation Equipped with variable speed control Space cooling through convection flows of heat exchanges with no fan required CO 2 sensor CO 2 sensor to regulate outdoor air supply to the building

10 Passive Displacement Ventilation Application All Tutorial Rooms, Writing Centre and Library Benefits Reduce structural and material cost Reduce noise level Good thermal comfort Better RH control Energy Saving Air distribution saving of 86.15%

11 Chiller Plant Cooling Load (RT) NTU LH Building Load (RT) HSS Building Load (RT) NTU LH Chiller Plant Efficiency (kw/rt) NTU LH Chiller Plant Efficiency (kw/rt)

Active design Design for Sustainability Lighting Strategies Design Strategy Optimization of day lighting and use of energy efficient light

Day lighting Optimization of day lighting at the Atrium through the use of skylight Light Fittings Operational Strategy Use of T5 and PLC energy

12 Active design Design for Sustainability Lighting Strategies Design Strategy Optimization of day lighting and use of energy efficient light fittings. Day lighting Optimization of day lighting at the Atrium through the use of skylight Light Fittings Operational Strategy Use of T5 and PLC energy efficient light fittings with high frequency ballast Motion sensor for toilets, tutorial rooms and staircases 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

13 Energy Modeling Results Total Saving 30.1% GFA (m 2 ) 14,555 Normalised EEI Description of Energy Systems Proposed Model Energy Consumption (kwh/year) Base Model Energy Consumption (kwh/year) Energy Savings Chillers* 346, , % 1 CHWP* 16,878 38, % B Heat Rejection (CNWP+CT)* 45,609 84, % B p South Spine Chiller Plant S 42,064 84, % (night load) C PDV - 93, % P FAF 12,396 21, % P FCU 4,079 4, % B VRV 252, , % S Lightings 241, , % P MV Fan 12,457 12, % B Lift 19,165 21, % V Server load 254, , % Receptacle load 174, , % P Total Consumption 1,422,543 2,035, % 2 * NTU LH chiller plant serve both LH & HSS until 8:00pm, night load afterwards will be served by NTU South Spine chiller plant

14 Water Conservation Strategies Hydrophylic Polymer Use of polymer to increase soil absorption and distribution of moisture to eliminate the need for irrigation system 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 WELS Rated Fittings Water saving through the use of excellent WELS Rated Fittings

15 Environmental Protection Strategies Extensive use of SGLS Rated Green Products RECYCLED CARPET WATERPROOFING RAISED FLOOR SYSTEM TIMBER DECK DRYWALL PARTITIONS Used in Lecture Theatre, Library and Writing Centre All external areas and internal wet spaces Used in Lan Room Used for Planter Terrace Used in Tutorial Rooms, Library and Lecture Theatre *Building is design to minimum use of finishes/ processed product

16 Environmental Protection Strategies Refrigerant R134a with ozone depletion potential of zero or with global warming potential of less than 100 Environmentally Friendly Transportation Modes 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

17 Green Innovation Strategies Clashing detection from BIM Models from different disciplines:

18 Green Innovation Strategies BIM generated tabulation of building elements and concrete volume calculation: - Wall Schedule - Window 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

19 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, unmatched by conventional systems with mechanical fans.

20 Green Innovation Strategies No Ceiling Bare Finish Concrete Column 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. Bare Screed Flooring

21 Thank You Presented by:

22 Green Mark Scoring Summary 1. ENERGY EFFICIENCY 2. WATER EFFICIENCY ENVIRONMENTAL PROTECTION INDOOR ENV. QUALITY OTHER GREEN FEATURES TOTAL (Energy Saving = 30.10%) Green Mark Try Again Certified Gold Gold Plus Platinum Score

23 Green Mark Detailed Scoring BCA Green Mark Version 4.0 Allocation Scored Part 1 - Energy Efficiency 1-1 Building Envelope ETTV Air-Conditioning System (Total 1-1 to 1-2) Building Envelope Design/Thermal Parameters Natural Ventilation (exclude carparks) 20 0 (Total 1-3 to 1-4) Day Lighting Artificial Lighting Ventilation in Car parks Ventilation in Common Areas Lifts and Escalators Energy Efficient Practices & Features Renewable Energy 20 0 Category Score for part 1 - Energy Efficiency (Total 1-5 to 1-11) Prorate Subtotal (A) + Prorate Subtotal (B) + Subtotal (C) TOTAL (ENERGY) including BONUS = 116(Max) 58.6 Allocation Scored Part 2 - Water Efficiency 2-1 Water Efficient Fittings Water Usage and Leak Detection Irrigation System Water Consumption of Cooling Tower 2 1 (Category Score Part 2) Part 3 Environmental Protection 3-1 Sustainable Construction Sustainable Products Green Provision Environmental Management Practice Green Transport Refrigerants Storm Water Management 3 0 (Category Score Part 3) Part 4 - Indoor Environmental Quality 4-1 Thermal Comfort Noise Level Indoor Air Pollutants Indoor Air Quality (IAQ) Management 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)= TOTAL (ENERGY + OTHERS) ESTIMATED SCORE = (190 max) (Energy Saving = 30.10%) Platinum

24 Energy Modeling Results All 11 AHUs assume baseline 0.67 W/CMH Total Saving 30.3%

BCA Green Mark for Existing Non-Residential Buildings Version 3.0

BCA Green Mark for Existing Non-Residential Buildings Version 3.0 Framework BCA Green Mark for Existing Non-Residential Buildings (version 3.0) To achieve Green Mark Award Pre-requisite Requirement All