Building Science 1(ARC2413) | Case Study : Identifying
Innovative Passive Design Strategies
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[nanyang NTU]
GREEN UNIVERSI...
ContentPage
Building Science 1(ARC2413) | Case Study : Identifying
Innovative Passive Design Strategies
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No. Topic Pages
...
Introduction
Nanyang University School of Art, Design and Media is located at 81 Nanyang
Drive, Level 3 Singapore 637458 (...
Building Science 1(ARC2413) | Case Study : Identifying
Innovative Passive Design Strategies
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Image by :(Iam Architect, 20...
Building Science 1(ARC2413) | Case Study : Identifying
Innovative Passive Design Strategies
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Image by :(Iam Architect, 20...
Building Science 1(ARC2413) | Case Study : Identifying
Innovative Passive Design Strategies 6
EnergySavingStrategies
A. El...
Building Science 1(ARC2413) | Case Study : Identifying
Innovative Passive Design Strategies 7
EnergySavingStrategies
B. Ai...
Building Science 1(ARC2413) | Case Study : Identifying
Innovative Passive Design Strategies 8
EnergySavingStrategies
C. Mo...
Building Science 1(ARC2413) | Case Study : Identifying
Innovative Passive Design Strategies 9
EnergySavingStrategies
D. En...
Building Science 1(ARC2413) | Case Study : Identifying
Innovative Passive Design Strategies 10
A. Dual Flush Cistern Syste...
Building Science 1(ARC2413) | Case Study : Identifying
Innovative Passive Design Strategies 11
B. Self- closing tap
Self- ...
D. Using Constructed Wetlands to Treat Wastewater
Building Science 1(ARC2413) | Case Study : Identifying
Innovative Passiv...
Building Science 1(ARC2413) | Case Study : Identifying
Innovative Passive Design Strategies
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Singapore is located in the...
Building Science 1(ARC2413) | Case Study : Identifying
Innovative Passive Design Strategies
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Average Temperature (°C) - ...
Building Science 1(ARC2413) | Case Study : Identifying
Innovative Passive Design Strategies
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Average Rainfall (mm) - Sin...
WindDirectionAnalysis
Building Science 1(ARC2413) | Case Study : Identifying
Innovative Passive Design Strategies
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(Dece...
Building Science 1(ARC2413) | Case Study : Identifying
Innovative Passive Design Strategies
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(June-September)
Wind analy...
Windbreaks are commonly used to protect outdoor areas, it can be fences or plants.
In this case, the windbreaks for Nanyan...
Building Science 1(ARC2413) | Case Study : Identifying
Innovative Passive Design Strategies
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WindAnalysis
Point A Before...
Building Science 1(ARC2413) | Case Study : Identifying
Innovative Passive Design Strategies
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The Nanyang University Scho...
SunPathDiagram
Building Science 1(ARC2413) | Case Study : Identifying
Innovative Passive Design Strategies
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Diagram 6.1 ...
Building Science 1(ARC2413) | Case Study : Identifying
Innovative Passive Design Strategies
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Diagram 6.3 : 4pm
Diagram 6...
PassiveDesign
Passive design included the consideration of thermal transfer in terms of convection,
conduction, evaporatio...
Building Science 1(ARC2413) | Case Study : Identifying
Innovative Passive Design Strategies
24
Layer Function
Zoysia matre...
BenefitsofusingGreenRoofinNanyangNTU
During heavy or continuous rain, runoff can possibly damage waterways and rain
harves...
Building Science 1(ARC2413) | Case Study : Identifying
Innovative Passive Design Strategies
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Diagram : With Green Roof
D...
Building Science 1(ARC2413) | Case Study : Identifying
Innovative Passive Design Strategies
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The air quality can be impr...
Building Science 1(ARC2413) | Case Study : Identifying
Innovative Passive Design Strategies
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The turf grass trap and hol...
Building Science 1(ARC2413) | Case Study : Identifying
Innovative Passive Design Strategies
29
Nanyang Technology Universi...
Building Science 1(ARC2413) | Case Study : Identifying
Innovative Passive Design Strategies
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BenefitsofusingRainHarvesti...
Building Science 1(ARC2413) | Case Study : Identifying
Innovative Passive Design Strategies
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The rainwater harvesting sy...
Building Science 1(ARC2413) | Case Study : Identifying
Innovative Passive Design Strategies
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The system uses simple tech...
Conclusion
Nanyang University School of Art, Design and Media have made a lot of
modification to protect the environment. ...
Building Science 1(ARC2413) | Case Study : Identifying
Innovative Passive Design Strategies
34
Reference
 Alwitra.de,. (2...
Building Science 1(ARC2413) | Case Study : Identifying
Innovative Passive Design Strategies
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 GRHC WEBSITE,. (2014). Gr...
Building Science 1(ARC2413) | Case Study : Identifying
Innovative Passive Design Strategies
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 Uscentrifuge.com,. (2014)...
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Nanyang report

Published on: Mar 3, 2016
Source: www.slideshare.net


Transcripts - Nanyang report

  • 1. Building Science 1(ARC2413) | Case Study : Identifying Innovative Passive Design Strategies 1 [nanyang NTU] GREEN UNIVERSITY Architect: CPG Consultants Pte Ltd Project: Nanyang University, School of Arts, Design & Media Location: 81 Nanyang Drive, Level 3 Singapore 637458 Client: Nanyang Technological University PropertyType: University Date Completed: June 2006
  • 2. ContentPage Building Science 1(ARC2413) | Case Study : Identifying Innovative Passive Design Strategies 2 No. Topic Pages 1 Introduction 3 - 5 2 Energy Saving Strategies 6 - 9 3 Water Saving Strategies 10 - 12 4 Temperature & Climate Data 13 - 15 5 Wind Direction Analysis 16- 17 6 Wind Analysis 18 - 20 7 Sun Path Analysis 21 - 22 8 Passive Design – Green Roof 23 - 28 9 Passive Design – Rainwater Harvesting System 29 - 32 10 Conclusion 33 11 Reference 34 - 36
  • 3. Introduction Nanyang University School of Art, Design and Media is located at 81 Nanyang Drive, Level 3 Singapore 637458 (Cpgcorp.com.sg, 2014). This 19,000𝑚2 campus is constructed by CPG Consultant Sdn Bhd. It costs 38 million Singapore dollars and completed at June 2006 (Cpgcorp.com.sg, 2014). It is functioned as a school that only provide undergraduate and post-graduate studies for courses such as Architectural Design, Civil & Structural Engineering, Mechanical & Electrical Engineering, and Quantity Surveying Services (Cpgcorp.com.sg, 2014). It is awarded by USA School Construction News Awards on 2007 and recognized as platinum class sustainable building by BCA green mark on 2010 (Cpgcorp.com.sg, 2014). The recognition of green mark will be examined again every three years to maintain building sustainability. Building Science 1(ARC2413) | Case Study : Identifying Innovative Passive Design Strategies 3 Diagram 1.1: Site Plan
  • 4. Building Science 1(ARC2413) | Case Study : Identifying Innovative Passive Design Strategies 4 Image by :(Iam Architect, 2013) Image by :(Iam Architect, 2013)
  • 5. Building Science 1(ARC2413) | Case Study : Identifying Innovative Passive Design Strategies 5 Image by :(Iam Architect, 2013) Image by :(Iam Architect, 2013)
  • 6. Building Science 1(ARC2413) | Case Study : Identifying Innovative Passive Design Strategies 6 EnergySavingStrategies A. Elevator motor NTU-ADM has applied the Mitsubishi VVVF inverter control panel for the elevators. VVVF stands for “variable voltage and variable frequency”. According to the official website of Mitsubishi, the design of the motor has been modified to increase its motor efficiency. The design allow significant amount of magnetic field to be produced, resulting in lower energy consumption and resources. By doing so, carbon dioxide emission has been reduced. According to the chart below, the energy consumption of VVVF system is lesser than a conventional AC-2 system by approximately 60% (Mitsubishielectric.com, 2014). Diagram 2.1 : Energy consumption of VVVF system to AC-2 System (Mitsubishielectric.com, 2014)
  • 7. Building Science 1(ARC2413) | Case Study : Identifying Innovative Passive Design Strategies 7 EnergySavingStrategies B. Air conditioning system Diagram 3.1 : Outdoor condensed unit NTU-ADM has applied the environment friendly air conditioning system, City Multi series. One condensed unit can be connected to 50 indoor units. This system only required two copper pipes instead of 3 pipes, reduced the installation cost and simple installation. The refrigerants are circulate through two small diameter refrigerant copper pipes. This system has applied the intelligent VRF (Variable Refrigerant Flow) system which controlling the variable speed compressor in the outdoor unit. Hence, the amount of refrigerant flows from the outdoor unit according to the setting of each indoor unit. While the outdoor unit employs the VRF system, each indoor units has employed LEV (Linear Expansion Valve) to meet the cooling and heating needs (Mitsubishielectric.ca, 2014). Each indoor unit can be personalized by applying this system. For example, indoor units that facing to east and west direction require more cooling at certain period compare to other units. This system is able to start and stop its operation due to the requirement of each indoor unit. Hence, creating high ratio of cooling and heating demand. As the result, it reduced the energy consumption of the building, remain high Coefficient of Performance (COP) and Seasonal Energy Efficiency Rating (SEER) (Baymarsupply.com, 2014).
  • 8. Building Science 1(ARC2413) | Case Study : Identifying Innovative Passive Design Strategies 8 EnergySavingStrategies C. Motion Sensor Motion sensor has been installed for all the toilets and corridors in NTU- ADMN. It will automatically turn on if it senses occupancy in the certain area. If the area has no occupancy, the lights will automatically turn off hence it is conventional and energy saving technology (Sensor & Sensor, 2009). Diagram 3.3 : Corridor of NTU-ADM Diagram 3.2 : Section AA’ Motion Sensor
  • 9. Building Science 1(ARC2413) | Case Study : Identifying Innovative Passive Design Strategies 9 EnergySavingStrategies D. Energy saving light Diagram 3.6 : Library Lighting Florescent light is also an environment friendly material as it is free from toxic chemicals like conventional light bulb. It is a recyclable material that will reduce the carbon footprint of NTU-ADM (Beta-lighting.com, 2014). Diagram 3.4 : Section AA’ Fluorescent Light Diagram 3.7 : Corridor Lighting Energy saving light has been used in the NTU-ADM building. NTU-ADM has employed fluorescent lighting by BETA lighting due to few reasons. It has more energy efficiency compare to conventional light bulb. For a normal light bulb, 80% of energy is released as heat energy, only 20% of energy is used to operate, while fluorescent light bulb has approximately 80-90% energy operation. As it release lesser heat energy, the surrounding temperature will not raise as much as the conventional light bulb, hence the interior space can maintain in suitable temperature easily (Beta-lighting.com, 2014).
  • 10. Building Science 1(ARC2413) | Case Study : Identifying Innovative Passive Design Strategies 10 A. Dual Flush Cistern System NTU- ADM has applied the dual flash cistern system in toilet. Dual flush toilets are high efficiency toilet. It consumes much less water per flush than ordinary toilets do. Standard toilets flush by using water to siphon waste out of the toilet bowl (Poolesplumbing.com, 2014). Naturally, using water to push water involves a great deal of waste. However, dual flush cisterns use a small amount of water to push waste into the trap way, which is much wider on dual flush toilets than the standard variety, making it require less pressure to remove waste effectively (Poolesplumbing.com, 2014) . In addition to this water saving measure, dual flush toilets have a "half flush" option that allows them to flush using only half as much water. This is specifically designed for use with liquid waste, and prevents water from being used when it is not necessary (Poolesplumbing.com, 2014). Diagram 4.1 : Dual Flush Cistern System WaterSavingStrategies
  • 11. Building Science 1(ARC2413) | Case Study : Identifying Innovative Passive Design Strategies 11 B. Self- closing tap Self- closing tap has been mounted in the basin for all the toilets in NTU- ADM. The main difference between self-closing tap and other tap is the fact that it turns itself off after a set period of time. This is particularly useful in commercial situations where water-saving is of the utmost importance. It also reduces the risk of people leaving the tap on and flooding the area (Poolesplumbing.com, 2014). Diagram 4.2 : Self-closing tap WaterSavingStrategies Wastewater separation and treatment system have been installed in NTU- ADM. Wastewater from the sewers flows through a pipe connection into the wastewater separation system where the separation of solids present in the effluents and the compaction and de-watering of the extracted solid take place. Then, the elimination of gross solids processes take place. After the pre-treatment, the wastewater proceeds to further treatment, whereas the de-watered solids are ready for disposal. After finish the process, the water is again been used in any purposes (Uscentrifuge.com, 2014). C. Wastewater separation and treatment system
  • 12. D. Using Constructed Wetlands to Treat Wastewater Building Science 1(ARC2413) | Case Study : Identifying Innovative Passive Design Strategies 12 WaterSavingStrategies Diagram 4.3 : Wetland Treatment Diagram 4.4 : Green roof of NTU-ADM Wetland is constructed to the green roof of NTU- ADM to treat the wastewater. Constructed wetlands are purpose built wetlands which are specially designed for the treatment of wastewater. Physical, chemical, and biological processes combine in wetlands to remove contaminants from wastewater. These processes are fundamental not only to designing wetland systems but to understanding the fate of chemicals once they enter the wetland (Wetlandsystems.ie, 2014). Wetlands are relatively inexpensive to install and can have low to zero running costs and electricity requirements, as long as pumps are not needed. Ideally gravity should bring the effluent down to a constructed wetland and then on to the groundwater (Wetlandsystems.ie, 2014).
  • 13. Building Science 1(ARC2413) | Case Study : Identifying Innovative Passive Design Strategies 13 Singapore is located in the equatorial region and experience tropical climate. Hence, the weather is hot and humid for the entire years. Singapore does not have summer and winter season but rainy season and dry season. According to the macroclimate graphs, the mean highest maximum temperature is 31 degree Celsius and mean average lowest maximum temperature is 24.15 degree Celsius. The mean average temperature of Singapore is 27.58 Celsius degree. The mean average rain precipitation for whole years are around 177.15mm and reach the highest on December, while the mean average humidity level is around 83.90%. The climate at a particular site can be quite difference from the climate data that are published as being representative of an entire region. For example, Nanyang campus are located at sub-urban place which are far away from the city. The surrounding conditions are differ from the cities hence the data for microclimate has less accuracy to predict the local climate data. Temperature&ClimateData Diagram 4.5 : NTU-ADM Entrance
  • 14. Building Science 1(ARC2413) | Case Study : Identifying Innovative Passive Design Strategies 14 Average Temperature (°C) - Singapore 0.00 10.00 20.00 30.00 40.00 50.00 60.00 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Temperature (1929-2013) Outdoor Mean Max Outdoor Mean Min 0.00 20.00 40.00 60.00 80.00 100.00 120.00 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Relative Humidity (%) Mean Daily Max Mean Daily Min 24 hours Mean Average Humidity (%) - Singapore (App2.nea.gov.sg, 2014) (App2.nea.gov.sg, 2014)
  • 15. Building Science 1(ARC2413) | Case Study : Identifying Innovative Passive Design Strategies 15 Average Rainfall (mm) - Singapore 0.00 50.00 100.00 150.00 200.00 250.00 300.00 350.00 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Yearly Rainfall (1869-2013) Mean Monthly Total (mm) (App2.nea.gov.sg, 2014)
  • 16. WindDirectionAnalysis Building Science 1(ARC2413) | Case Study : Identifying Innovative Passive Design Strategies 16 (December-March) Data by:(App2.nea.gov.sg, 2014)
  • 17. Building Science 1(ARC2413) | Case Study : Identifying Innovative Passive Design Strategies 17 (June-September) Wind analysis included general wind analysis and local wind analysis. The wind pattern can be affected by reasons such as plant and the building at the surrounding. The wind distribution is mainly from north-east and southwest direction. The wind direction is affected by the monsoon seasons in Singapore. According to the graphs shown above, the winds are originate from north-east direction from December to March while the winds are from south- west direction from June to September. Data by:(App2.nea.gov.sg, 2014) WindDirectionAnalysis
  • 18. Windbreaks are commonly used to protect outdoor areas, it can be fences or plants. In this case, the windbreaks for Nanyang University school of art, design and media is the plants and the building itself. There are approximately 40 plants has been planted and arranged in two rows. The gap between the plants are arranged around 3.5m to avoid the roots of plants intersecting and interrupt the growth of plants. Besides, the distance between the plants will also affect the windbreak pattern. According to Heusch (1988), if the wind velocity has been cut too much by very close planting, it will affect the surrounding temperature rises. It would be better to regenerate a stand of approximately 40 adult trees to cut the wind-speed more frequently. This strategies has been applied by the project. The effect of windbreaker influences by height of the plants, distances of plants to the center of Façade and windbreak lengths. The windbreak pattern is shown as in the diagram below. Building Science 1(ARC2413) | Case Study : Identifying Innovative Passive Design Strategies 18 WindAnalysis Diagram 5.1 : Wind breaker pattern on Plan
  • 19. Building Science 1(ARC2413) | Case Study : Identifying Innovative Passive Design Strategies 19 WindAnalysis Point A Before the wind reaches the plants, it slows down and builds pressure, and turns upwards and sideways. Point B It passes the obstacle (plants), it increases its speed, and reduced pressure results at the sides of and behind obstacles. Point C The wind experiences increased pressure again and slow downs. Point D The air pressure is lower hence the air velocity is higher. In conclusion, wind ultimately returns to its original flow pattern after encountering an obstacle such as a plants and buildings. These pressure differences, flow patterns, and the size and shape of the wind-protected areas behind the plants are important to control the air motion, inside and outside of the building. Diagram 5.2 : Wind breaker pattern on Section BB’ A B C D Natural Ventilation (Shaded) Diagram 5.3 : Trees surrounding NTU-ADM’ Building (Air-Conditioned)
  • 20. Building Science 1(ARC2413) | Case Study : Identifying Innovative Passive Design Strategies 20 The Nanyang University School of Art, Design and Media’s facades are mostly glazed glass which may be a large disadvantage because of the large exposed surface to the sunlight (Greensource.construction.com, 2014). Although the building will have sufficient natural lighting for the internal spaces, the heat trapped indoor is also higher compared to buildings that are shaded. The Venturi effect can help in introducing wind movement into the building for natural ventilation and passive cooling. The Venturi effect is used along with convection current to create air movement in the building itself and decrease room temperature. Convection means the transfer of heat by the movement of air. Thus, the warm air at the lower area will replace the cold air at a higher area continuously and eventually creates an air movement in the building. This process normally is usually slow and minimal therefore the Venturi effect can help in accelerating the process. The high pressure zone and low pressure zone can create an increased air flow over the surfaces of the building which are the green roof and the glass façade. Cooling down the surfaces reduces heat energy transmitted to the envelope which the heat will be conducted to the air indoor. The flowing air that passes the envelope of the building will also carry the warm air, which is ventilated from the interior of the building, away to the atmosphere. Venturi Effect on Nanyang NTU Diagram 5.4 : Venturi Effect on Section BB’
  • 21. SunPathDiagram Building Science 1(ARC2413) | Case Study : Identifying Innovative Passive Design Strategies 21 Diagram 6.1 : 9am Diagram 6.2 : 12pm
  • 22. Building Science 1(ARC2413) | Case Study : Identifying Innovative Passive Design Strategies 22 Diagram 6.3 : 4pm Diagram 6.4 : 6pm Sun Path Diagram
  • 23. PassiveDesign Passive design included the consideration of thermal transfer in terms of convection, conduction, evaporation, absorption and radiation in design to achieve thermal comfort by manipulating natural surrounding. There are two important passive design have been selected to be analyzed. Building Science 1(ARC2413) | Case Study : Identifying Innovative Passive Design Strategies 23 Approximately 7-8mm grass 15mm Growing Medium EVALON waterproofing membrane Concrete deck Drainage/ Moisture Retention Layer ZoysiaMatrella OphiopogonJaponicus Diagram 7.1 : Passive Design on Section AA’ Section of Green roof(EVALON® Waterproofing Membranes, 2014)
  • 24. Building Science 1(ARC2413) | Case Study : Identifying Innovative Passive Design Strategies 24 Layer Function Zoysia matrella -Also known as manila grass -Dark green colour with fine leaves -Low moving requirement -Good wearing ability -Able to grow in low light density surrounding -Suitable to grow in both acidic and salt affected soils. -Able to stablelize soils in erosion prone areas -Low maintenance requirement hence saving cost. (Turfsolutions.com.au, 2014) Ophiopogon japonicus -Also known as mondo grass -Dark green colour with fine leaves -Able to grow in low light density surrounding -Moderate growth rate -Less maintance required -Suitable in tropical climate -Required sandy soil -Able to reduces the growth of weeds (Floridata.com, 2014) Volcanic rock -Has highest density compare to other rock such as arkalyte -Has porosity due to the properties of volcanic rock -Has high water holding capacity -Decrease the total dead load of roof system EVALON waterproofing membrane -Resistant to damaging radiation without protective coating -Fire and radiant heat resistant The fire load is five times lower than that of built-up felt roof -Good thernal and mechanical properties -Low vapour diffusion resistance to remove moisutre from the roof build-up all over the whole membrane surface -Resistant to root or rhizome penetration according to FLL testing, thus can be applied on green roofs without extra root protection layer -Recyable (Alwitra.de, 2014) Table 1.1 : Layering of Green Roof
  • 25. BenefitsofusingGreenRoofinNanyangNTU During heavy or continuous rain, runoff can possibly damage waterways and rain harvesting system (GRHC WEBSITE, 2014). The growing media of the green roof which are the volcanic rocks and sand together with the turf grass can hold water and this water will go into the rainwater harvesting system to be reuse. Some of the water is returned to the atmosphere through evaporation and transpiration (evapotranspiration) (GRHC WEBSITE, 2014). Storm water that runoff the roof is much more delayed and reduced in volume. The green roof will filter the storm water and makes the water cleaner than the water that runoff a conventional roof (GRHC WEBSITE, 2014). According to the data collected by researchers from Pennsylvania State University, it indicates that green roofs able to capture up to 80% of rainfall compared to conventional roof which only captured 24% of rainfall during rainy season. Building Science 1(ARC2413) | Case Study : Identifying Innovative Passive Design Strategies 25 Roof Drained Water Plant Medium Roof Drained Water Green roof reduces water runoff from heavy rain Diagram 7.2 : Green Roof Drainage(Greensource.construction.com, 2014) Table 1.2 : Water Retention of Roofs(Nps.gov, 2014)
  • 26. Building Science 1(ARC2413) | Case Study : Identifying Innovative Passive Design Strategies 26 Diagram : With Green Roof Diagram 7.3 : Without Green Roof The green roof can lessen the rate of heat energy transfer through the roof, and lesser amount of energy for cooling means greater cost savings. External shading of the building envelope is proven to be more energy efficient than internal insulation (GRHC WEBSITE, 2014). During the day, the green roof protects the building from direct solar heat increasing the heat energy transfer to the interior space (GRHC WEBSITE, 2014). During the night, the green roof reduces the loss of heat energy due to the thick layers. Thus, green roof is great in maintaining the temperature of the interior and balancing the heat energy transfer (GRHC WEBSITE, 2014)Less usage of energy in the building itself produces fewer greenhouse gas emissions. Green roof is energy efficient
  • 27. Building Science 1(ARC2413) | Case Study : Identifying Innovative Passive Design Strategies 27 The air quality can be improved by using green roof. Nanyang University School of Art, Design and Media is located at sub urban area, which is far away from the cities, hence the rate of pollution is lower compare the buildings located in the cities. Besides that, the massive green roof plays an important role in cleaning the air around the area. The turf grass trap and hold dust particles in the air to reduce air pollution that is bad for human health, and evapotranspiration of plant helps to cool down the surrounding temperature (PCA, 2014). Green roof reduces impurities in the air and heat that will produce smog. Reduced Urban Heat Island profile which is increasing every year. There is lesser need for health care services due to good air quality in the surroundings (PCA, 2014). Green roof improve air quality Diagram 7.4 : Average Roof Surface Temperature
  • 28. Building Science 1(ARC2413) | Case Study : Identifying Innovative Passive Design Strategies 28 The turf grass trap and hold dust particles in the air to reduce air pollution that is bad for human health, and evapotranspiration of plant helps to cool down the surrounding temperature (PCA, 2014). Green roof reduces impurities in the air and heat that will produce smog. Reduced Urban Heat Island profile which is increasing every year. There is lesser need for health care services due to good air quality in the surroundings (PCA, 2014). Green roof improve air quality Green roof provide ‘extra’ space The green roof fully utilizes the roof and turn the rooftop into a place for socializing and relaxing purposes as there are a lot of unused spaces in the developing city (PCA, 2014). The roof creates convenient and comfortable space for day care, meetings, and recreation (PCA, 2014). It also creates a better panoramic view for the adjacent buildings (PCA, 2014) Diagram 7.5 : Urban Heat-Island(PCA, 2014)
  • 29. Building Science 1(ARC2413) | Case Study : Identifying Innovative Passive Design Strategies 29 Nanyang Technology University has a large surface of green on its roof which enables the building to serve as a water catchment area since Singapore itself undergoes tropical climate and there is plenty of rain whole year long. The rainwater is absorb by the green roof preventing water runoff from the curve roof. After the rainwater is filtered by the green roof, the water is transferred to the gutter and then down to the filtration system underground. The rainwater will be further treated and then pump back together with the PUB water for potable water which is also grey water. Similar system is used in the diagram above where the rainwater is stored under- ground after being filtered and then pumped back up for domestic usage in the building. Diagram 7.6 : Rainwater Collection Device (Justin, 2014) ^Diagram 7..7 : Pipe transferring water to gutter. >Diagram 7.8 : Water goes underground through this tunnel
  • 30. Building Science 1(ARC2413) | Case Study : Identifying Innovative Passive Design Strategies 30 BenefitsofusingRainHarvestingSysteminNanyangNTU Rainwater Harvesting System is fitted on the green roof for irrigation To reducing solar gain and slowing runoff during Singapore’s frequent downpours, it is irrigated using rainwater collected in storage tanks; a moisture retention mat installed beneath the lightweight soil also helps keep the grass consistently damp under the sun. The rainwater harvesting system helps to reduce the impact on the environment by reducing the use of fuel based machines. It is suitable for irrigation and watering garden because the rainwater is free from many chemicals found in ground water and also free from pollutants as well as salts, minerals, and other natural and man-made contaminants, so, it is good for irrigation and plant thrive. The automatic irrigation system tends to use a lot of water very quickly, so it can only be used as part of very large rainwater harvesting systems that feature large storage tanks. There systems are typically designed and installed by professionals. Diagram 7.9 : Rainwater Harvester
  • 31. Building Science 1(ARC2413) | Case Study : Identifying Innovative Passive Design Strategies 31 The rainwater harvesting system not only reduces dependence on ground water and the amount of money spent on water, but also reduces off-site flooding and erosion by holding rainwater on the green roof. During the rainy season, rainwater is collected in a large storage tanks which also helps in reducing floods in some low lying areas. Besides, it helps in reducing contamination of surface water with pesticides and fertilizers from rainwater run-off (Conserve-Energy-Future, 2014). Rainwater harvesting also can reduce salt accumulation in the soil which can be harmful to root growth. When collected, rainwater filters into the soil, forcing the salt down and away from the root zone area. This allows for greater root growth and water uptake, which increases the drought tolerance of the grass (Conserve-Energy-Future, 2014). Rainwater Harvesting Helps Reduce Floods & Soil Erosion Diagram 7.10 : Water Sprinklers Diagram 7.11 : Rain Harvesting System(Conserve-Energy-Future, 2014)
  • 32. Building Science 1(ARC2413) | Case Study : Identifying Innovative Passive Design Strategies 32 The system uses simple technologies that are inexpensive and easy to maintain. The maintenance of the system requires little time and energy. The result is the collection of water that can be used in substantial ways even without purification (Paul Mansfield, 2014). The operation and maintenance of rainwater harvesting system is controlled by the individual without having to rely upon the maintenance practices of a municipally controlled water system (Conserve-Energy-Future, 2014). Rainwater Harvesting System Is Easy To Maintain The rainwater harvesting system provides an independent water supply during regional water restrictions and in developed countries is often used to supplement the main supply (Commonfloor.com, 2014). It provides water when there is a drought, can help mitigate flooding of low-lying areas, and reduces demand on wells which may enable ground water levels to be sustained. In addition, it also helps in the availability of potable water as rainwater is substantially free of salinity and other salts (Paul Mansfield, 2014). Rainwater Harvesting System Can Be Used As A Backup Source To Municipal Water Diagram 7.12 : (Paul Mansfield, 2014)
  • 33. Conclusion Nanyang University School of Art, Design and Media have made a lot of modification to protect the environment. It has been one of the significant sustainable buildings in Singapore as well as the world. It has become a good example on how to cooperate the surrounding to the building in order to minimize the damage to the environment. Climate studies are important to analyze the building ventilation and shading. It helps to analyze the location of shading devices should be placed. It is important to understand the climate and weather of the place to avoid design failure and high maintenance. The sustainable designs and concepts are site specific, which indicates the type of grass used for green roof and type of glass used for the façade has been tested before it is chosen to apply on the building. It can moderate the air temperature as well as the air quality of the interior space and surrounding. The shape of green roof allows the user to rest on the green roof hence it provides extra spaces. Rain harvesting system reduces flood and soil erosion. The water that has been collected can be reused in toilet flushing and washing hand. It is easy to maintain hence reduce the cost of maintenance. By applying the modifications, Nanyang University School of Art, Design and Media is able to maintain the platinum class of Green Mark. Building Science 1(ARC2413) | Case Study : Identifying Innovative Passive Design Strategies 33
  • 34. Building Science 1(ARC2413) | Case Study : Identifying Innovative Passive Design Strategies 34 Reference  Alwitra.de,. (2014). EVALON® – the original | alwitra. Retrieved 25 May 2014, from http://alwitra.de/en/flat-roof-systems/products/waterproofing-membranes/evalon/  App2.nea.gov.sg,. (2014). Weather Statistics. Retrieved 25 May 2014, from http://app2.nea.gov.sg/weather-climate/climate-information/weather-statistics  Baymarsupply.com,. (2014). mitsubishi electric. Retrieved 25 May 2014, from http://www.baymarsupply.com/air-conditioning-mitsubishi-electric  Beta-lighting.com,. (2014). Beta Lighting. Retrieved 25 May 2014, from http://www.beta- lighting.com/  Commonfloor.com,. (2014). Rain Water Harvesting System: Its Advantages. Retrieved 25 May 2014, from http://www.commonfloor.com/guide/rain-water-harvesting-system-its- advantages-4226.html  Conserve-Energy-Future,. (2014). Renewable & Non-Renewable Energy Sources - Conserve Energy Future. Retrieved 25 May 2014, from http://www.conserve-energy- future.com/  Cpgcorp.com.sg,. (2014). CPG Consultants - Nanyang Technological University, School of Art, Design & Media. Retrieved 25 May 2014, from http://www.cpgcorp.com.sg/CPGC/Project/Project_Details?ProjectID=1022  EVALON® Waterproofing Membranes. (2014) (1st ed., p. 7). Germany. Retrieved from http://alwitra.de/wp-content/uploads/2013/05/alwitra_Evalon_en_11_2013.pdf  Floridata.com,. (2014). Floridata: Ophiopogon japonicus. Retrieved 25 May 2014, from http://www.floridata.com/ref/o/ophi_jap.cfm  Greensource.construction.com,. (2014). Nanyang Technological University - CPG Consultants - Singapore - Green-Building Case Study ? GreenSource Magazine. Retrieved 25 May 2014, from http://greensource.construction.com/projects/2009/05_Nanyang- Technological-University.asp
  • 35. Building Science 1(ARC2413) | Case Study : Identifying Innovative Passive Design Strategies 35  GRHC WEBSITE,. (2014). Green Roof Benefits - GRHC WEBSITE. Retrieved 25 May 2014, from http://www.greenroofs.org/index.php/about/greenroofbenefits  Iam Architect,. (2013). Green Roof Art in Singapore. Retrieved from http://www.iam- architect.com/wp-content/uploads/2013/09/ntu_singapore9.jpg  Justin (2014, January 28). rainwater-collection-device [Diagram]. Retrieved from http://www.bluegranola.com/2010/01/28/a-drop-in-the-bucket/  Mitsubishielectric.ca,. (2014). Mitsubishi Electric Sales Canada Inc. - City Multi. Retrieved 25 May 2014, from http://www.mitsubishielectric.ca/en/hvac/city_multi/r2_series.html  Mitsubishielectric.com,. (2014). Elevators & Escalators - MITSUBISHI ELECTRIC. Retrieved 25 May 2014, from http://www.mitsubishielectric.com/elevator/modernization/elevator_index.html  Nps.gov,. (2014). Green Roof Benefits—Technical Preservation Services, National Park Service. Retrieved 25 May 2014, from http://www.nps.gov/tps/sustainability/new- technology/green-roofs/benefits.htm  Paul Mansfield, w. (2014). Renewable Technologies : Information : Carbon Saving Technology : Rainwater Harvesting. Renewabletech.co.uk. Retrieved 25 May 2014, from http://www.renewabletech.co.uk/information/carbon-saving-technology/rainwater- harvesting/  PCA,. (2014). Heat Island Reduction. Retrieved from http://www.concretethinker.com/Content/ImageLib/lblgraph.jpg  Poolesplumbing.com,. (2014). Dual Flush Toilet Advantages. Retrieved 25 May 2014, from http://www.poolesplumbing.com/plumbing-tips/dual-flush-toilet-advantages/  Sensor, W., & Sensor, W. (2009). Lutron Wireless Occupancy Sensor. Architect Magazine. Retrieved 25 May 2014, from http://www.architectmagazine.com/lighting/lutron- wireless-occupancy-sensor.aspx  Turfsolutions.com.au,. (2014). Turf Solutions | Zoysia Matrella. Retrieved 25 May 2014, from http://www.turfsolutions.com.au/Matrella.html
  • 36. Building Science 1(ARC2413) | Case Study : Identifying Innovative Passive Design Strategies 36  Uscentrifuge.com,. (2014). Wastewater Treatments Equipment Systems for Water Purification, Reuse and Sludge Removal for Wastewater Recycling for Industrial and Municipal Sites. Retrieved 25 May 2014, from http://www.uscentrifuge.com/wastewater-treatment.php  Wetlandsystems.ie,. (2014). FH Wetland Systems Ltd. - Constructed Wetlands. Retrieved 25 May 2014, from http://www.wetlandsystems.ie/constructedwetland.html

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