CII, hyderabad.. TERI banglore..... and SUZLON ONE EARTH case studies

CASE STUDY

CII, SOHRABJI GODREJ GREEN BUSINESS CENTRE

IN HYDERABAD

R.DHANASEKAR AC08UAR010 5th yr B.Arch, 10th sem.

CASE STUDY CII, SOHRABJI GODREJ GREEN BUSINESS CENTRE IN HYDERABAD


CII INTRODUCTION 0 The CII – Sohrabji Godrej Green Business Centre in Hyderabad is the first LEED Platinum rated building in India. 0 Locally available materials and sustainable energy sources have been used extensively in the building. 0 Natural lighting and ventilation enhance the energy-efficiency of the building. 0 Adequate green spaces help in controlling the micro-climate providing visual delight at the same time.

Aerial view of CII-Godrej GBC, Hyderabad showing wind towers, solar photovoltaic panels and green roofs. (Sourced)

Location, Orientation & Climate 0 It is located in HITEC City, a major technology township in Hyderabad. 0 Use of vehicles that run on alternative sources of energy is encouraged. Use of such vehicles helps in saving energy.

Site location

Natural Features Existing features in the landform have been integrated into the design without causing much harm to the local eco-system.

Rocks existing on site have been retained and integrated in the building design.

CASE STUDY R.DHANASEKAR AC08UAR010 5th yr B.Arch, 10th sem.

Architectural Design 0 The building is designed to maximise usage of natural light for day-lighting without getting unwanted heat inside. 0 The ground surface covered by the building is replaced through roof gardens which play a major role in insulating the building. 0 Unwanted gain of heat is reduced through simple design principles like earth berming. 0 Heat gain through openings is also reduced through intelligent design of windows.

0 An effective combination of closed and open spaces help in modulating the micro-climate so that it keeps the building cool and well-ventilated. 0 There is ease of access throughout the site.

Roof gardens insulate the building from solar heat.

Intelligent design of windows allow in light but keep the heat away

A combination of open and closed spaces keep the building cool and well-ventilated.

Materials & Appliances 0 Use of local materials and materials with low-embodied energy is visible at various places. 0 For instance, local stone and waste construction materials are used for external cladding. 0 Old furniture has been used in different parts of the building.

Locally available materials like stone and wood are used in the school

Old furniture used in the cafeteria negates the energy consumed in making new furniture

Daylighting 0 Emphasis is laid on providing adequate day-lighting. 0 Intelligent design of windows such as different windows for views and for light reduce the heat gain.

Abundant natural light is available in office spaces.

CII, SOHRABJI GODREJ GREEN BUSINESS CENTRE IN HYDERABAD


Ventilation 0 Effective measures are taken to properly ventilate the building while saving energy at the same time. o Air caught by the wind towers is carried through an earth-air tunnel which pre- cools the air entering into the AHU’s. This saves energy required in the cooling process. 0 ‘Jaalis’ on the outer façade of the building also help in cooling, shading and ventilation of the building.

Wind towers carry air through an earth air tunnel to cool it before being supplied to the AHU’s

‘Jaalis’ help in cooling and shading the building and inducing ventilation

Renewable Energy 0 Solar energy is used to generate electricity that is used in the building. 0 Use of vehicles that run on alternative sources of energy is encouraged.

Solar photovoltaic panels on the roof generate electricity for the building

Use of battery operated vehicles is encouraged

Water Management 0 Rain water is recharged into the ground. 0 The landscaped garden has a variety of local plants and trees which require less water for irrigation. 0 The garden has been designed such that all rainwater is retained.



Rain-water is harvested in the landscaped garden

0 All waste water is treated in a root zone treatment facility. 0 The treated water is used for flushing toilets and irrigating the garden.

Waste water is treated in the root zone treatment facility


There is a vast difference in the amount of glazed areas on the northern and western sides of the building. Such features prevent unwanted heat gain.

CASE STUDY

TERI, BANGLORE



INTRODUCTION The Energy and Resources Institute, Bangalore is among South India’s first energy-efficient and environmentally sustainable campuses. It houses work spaces for the staff, conference rooms, a library, a laboratory and a guest house. Dining and recreation facilities are shared between the offices and the guest house. It has the potential to serve as a model for future development in similar geographical and climatic conditions.

TERI, BANGLORE

TERI campus at Bangalore (Source – TERI Bangalore)

Location, Orientation & Climate 0 The site is located at Domlur, about 3 km from the Bangalore airport. 0 It is a long and narrow site with roads on the eastern and northern sides, the former being the major road. 0 The western side has an open ground and on the southern side is an open drain about 9 m wide. 0 The buildings are aligned along the east-west axis and entry into the site is from the road on the northern side which is relatively less busier.

Schematic layout of TERI Bangalore showing the surrounding roads and the drain (Source – TERI Bangalore)

0 The office block is kept towards the east, close to the main road for high visibility and the guest house is located towards the quieter western side. 0 In a moderate climatic zone like Bangalore where temperatures are not very high, a good ventilation system can easily provide comfortable living conditions.

The office blocks are placed towards the main road while the guest house is located on the quieter west side (Source – TERI Bangalore)


TERI, BANGLORE

Natural Features 0 The drain on the southern side is a major feature which influences the design. 0 Wind coming from the south over the drain brings in the foul smell into the site.

Open drain on the southern edge of TERI Bangalore

Architectural Design 0 This energy - efficient complex is designed to provide all round comfort for the users. 0 Comfort requirements are met through dexterous use of the five basic natural elements – sun, air, earth, water and sky to ensure natural lighting, ventilation and space conditioning. 0 The building opens to the north to take maximum advantage of glare-free light. Continuations of skylight spaces carry natural light into the building.

0 Adequate natural lighting and ventilation is provided through an optimized combination of solar passive design, energy-efficient equipment, renewable sources of energy and materials with low embodied energy. 0 The condition of the drain is proposed to be improved into a pleasant landscaped element by using plants that absorb impurities as well as with the help of basic filtration and aeration. This being an ideal long-term solution would be a major civic project. 0 The architecture responds to the present site conditions but the building can eventually open up towards the drain when it turns clean

A fresh environment is maintained inside the building

0 A cavity wall on the southern side insulates the building from solar heat gain. 0 The ground disturbed due to the building is replaced on the rooftop to form terrace gardens at various levels. These gardens along with earth berms provides good heat insulation and moderates fluctuations in temperature.

Trombe walls help in insulating the hostels

Materials & Appliances 0 As use of local materials reduces the energy consumed in their transportation, local materials and materials with low-embodied energy have been used wherever possible 0 The southern wall, for instance, is clad in local ‘kadappa’ stone. 0 Energy-efficient lighting devices like CFL lights have also been used.

Locally available ‘kadappa’ stone used to clad the southern wall


TERI, BANGLORE

Daylighting 0 Openings have been designed such that requirement of artificial lighting is minimal throughout the day when the building is under maximum usage.

0 By creating atrium spaces with skylights, the section of the building is such that natural light enters into the interiors of the building, considerably reducing the dependence on artificial lighting.

Abundant natural light inside due to intelligently designed fenestrations

Section showing natural light penetrating deep into the building through skylights and fenestrations (Source – TERI Bangalore)

Ventilation 0 A blank wall towards the south (facing the drain) allows the breeze to flow over the building. This creates a negative pressure which pulls fresh air from the north into the building. 0 The sections are designed such that hot air rises to the top and make the building breathe. 0 Air in the cavity in the south wall on the south creates negative pressure, thereby enhancing the convection currents in the building.

Sections showing induced ventilation created in the building through an effective design of sections and the cavity wall on the south creating convection currents


TERI, BANGLORE

Renewable Energy 0 A 5-kW peak solar photovoltaic system integrated with the roof skylights provides day-light and also generates electricity.

0 A solar water heating system meets the hot water requirements of the kitchen and the guest rooms. 0 Other energy conservation systems include an effective waste and water management system, a centralized uninterrupted power supply, and a kitchen that reduces internal heat.

Solar Photovoltaic's integrated with the roof provide natural light and electricity

Solar water heaters which meet the hot-water requirements of the campus

Water Management 0 An efficient rainwater harvesting system preserves water to the maximum possible extent. 0 Water run-off from the roofs and from the paved area is collected and stored in a collection sump below the amphitheatre. 0 This water is used for various purposes including landscaping and flushing toilets.

Schematic section of the building showing the rain water harvesting system (Source – TERI Bangalore)

CASE STUDY

RENEWABLE ENERGY CENTER, MITHRADHAM @

KERALA


CASE STUDY

SUZLON ONE EARTH @ PUNE




INTRODUCTION Suzlon One Earth @ Pune

Alternative Transportation has been encouraged in this project by providing 96 e-charging points to promote the use of low emitting and alternative fuel stations like electric cars and bikes. Various Water Treatment Techniques have been use in Suzlon One Earth project to ensure general water quality. The Rain water harvesting system helps to capture and treat and reuse the rain water on site. This reduces the need for potable water. The project has mitigated the heat island effect by providing 90.99% roof with SRI compliant materials. The steep slope roof is provided with high reflectance Indiana copper coated Kalzip Aluminium Profile sheet whereas the flat roof uses white ceramic tiles; a concept quite often seen in traditional architecture. The Solar Reflectance Index of these materials is more than 78, combining envelope performance with cost effectiveness.

Location

Project Team ProfileOwner Suzlon Energy Ltd.Architect Christopher Charles BenningerArchitects, PuneLandscape Consultants Ravi & Varsha Gavandi Landscape ArchitectsEnergy Consultant/ LEED Facilitator Environmental Design Solutions, Pune

0 Global HQ of Suzlon Energy Ltd and Group

Companies

0 820,000 Sft Integrated Development

0 LEED Platinum and GRIHA Five Star certified

campus

0 India’s first campus 100% on renewable

energy The Suzlon project has a Transportation Policy in place to cater to about 20% of the building occupants and employees can avail the company bus services in addition to the 200 executives participate in the carpooling program and 30 preferred parking spaces have been reserved for carpools.

0 The site is located at Hadaspar, Pune . 0 It is a long and narrow site with road on the eastern side of the site. 0 A river stream running on the western side, apartments on the northern side and a multi speciality hospital on the southern side. 0 The entry to the site is from the road on the eastern side.


Climate 0 Pune has a tropical wet and dry climate with average temperatures ranging between 20 to 28 °C (68 to 82 °F). 0 Pune experiences three seasons: summer, monsoon and a winter.

Architectural design

Master plan

Conceptualization

IT

MBU

Corporate Communication

HR / Admin

Finance

Executive

CLC

Board Room

Strategy Planning

Technology Group

Cafeteria

Travel Desk

Parking

Welcome Lounge

Library

Wind Gallery

Media Room

Record Room

New Business

Chairman Offce

Gymnasium

Training Rooms

IBMS / FMS

Courier Desk

Stores

Business Halls

Final plan



360 degree approach to Sustainability

1Environment Sensitive

development

2Water

Sensitive Approach

3Energy

Conscious Approach

4Eco-FriendlyMaterial & Resources

5Healthy & Productive

Indoor environment

6Innovative

Design Elements

• Minimum Site Disturbance

• Heat island effect

• Minimum light

pollution

• Use of native plants

• CFC & HCFC free material use

• Promote Public transport

• Rain Water Harvesting

• Use of low flow fixtures

• Use of sensor based fixtures

• Water efficient Irrigation

• 100 % use of sewage water

• Water efficient HVAC system

• Less water requirement landscape

• Energy efficient HVAC

• Energy efficient lighting

• Usage of renewable energy

• Sensor based lighting and ventilation

• Energy efficient electrical equipment

• Minimum Construction waste

• Use of regional materials

• Use of rapidly renewable material

• Recycle & reuse of material

• Use of high recycle content material

• Use of low emitting materials

• Indoor pollutants control

• Natural use of day light and view of outdoor spaces

• Increase ventilation

• Minimum pollution during construction

• Green design education

• Creating

green energy resource on site and off site

• Green house keeping

• Zero waste policy



Landscape 0 From form to functional enhancement 0 Responsive & responsible landscape

Landscape planning

Sustainability in landscape practices

0 Using recycled water

0 Reduced water consumption

0 Use of native plants

0 Creating new Habitats

Holistic Design Approach Space Planning - Interior, Architecture & Landscape “Becoming One”



Sustainability Features at One Earth

Sustainability has to be an objective from the concept stage and then embedded in every design aspect

Sustainable solution and practices are integrated towards efficiency in:

0 energy use

0 water use

0 waste management

0 materials use

0 healthy air quality

0 operating practices

Sustainability is the hallmark of this project while the result is an inspiring place to work. Achievements then speak for themselves.

Model of sustainable features

Design Approach Results

Recycle Waste

Occupants use

Daylight

60%

85%

90%Water

Savings

47%Energy Savings


Water Efficiency The Suzlon project is an excellent example of a building that is water efficient. The water use is reduced, generated sewage is treated and reused on site. To maximize the water efficiency within the buildings to reduce the burden on municipal water supply and waste water systems, following water saving fixtures are installed at site: 0 Low flow faucets (pressure compensated 1.6 GPM economic aerators) 0 Touchless urinals with hytronic sensor (0.22l/ sec;default flush time of 4 secs.) 0 Geber it concealed Dual Flush - half/full (0.8/1.6 GPF)



The on site waste water treatment is being done through a Sewage Treatment plant located at basement to treat the wastewater to tertiary standards. This treated water is used for Irrigation completely by eliminating the potable water demand by 100%. The treated water is also used for AC make up for the water cooled chillers.

Energy Efficiency The following measures have been taken to improve the building envelope design: 0 Optimized Orientation - Mass Articulation / Mutual 0 Shading High Performance Glazing 0 The exposed glass is 4mm Clear Annealed + 0.76mm 0 PVB + 6mm KT 455 + 12mm Air gap + 6mm Clear 0 Heat Strengthened. U value- 0.32 Btu/hr.ft2.ºF; Solar Factor- 0.26 0 Over Deck Insulation 0 Interior lighting power density <0.8W/sqft (350 Lux Average) 0 Use of Day lighting and Occupancy sensors

Some of the HVAC system Green Building features are: 0 HVAC equipment efficiencies have been designed to exceed the ASHRAE 90.1 2007 0 System Flexibility Of Variable Refrigerant Volume System 0 Pre-cooling And Heat Recovery 0 Direct-indirect Evaporative Cooling

HVAC (Heating Ventilation Air Conditioning) Systems: Air recycling systems that filter and also cool the air before re-supplying have been introduced to reduce load on air conditioners. The indoor unit’s cooling operation offers flexibility to the user to control the desired temperature in any location in the premises according to individual preferences. Controls for switching on or switching off, scheduling, temperature and air flow are possible for each enclosed space. Such flexibility of operation based on users’ needs curtails wastage and enables substantially higher energy savings than conventional systems. Direct-indirect evaporative cooling: Systems such as Indirect Evaporative Cooling have been used in certain areas to help maintain comfortable temperatures of 25°C and eliminate the need for air conditioners. This has helped reduce the total air conditioning required for the project substantially.

The Renewable Energy system to generate on-site green power consists of 18 Wind mills combined with 243 Solar Panels and 5.69% of the building’s energy is being provided by on-site renewable energy. Jet fans for parking ventilation: As opposed to conventional ducted arrangement, fresh air is drawn through large openings provided on the periphery of the basement, and pushed by PLC controlled dual speed jet fans towards the center of the basement. The foul air is picked up at 10 locations and exhausted onto the terrace level by exhaust fans. The connected load is brought down to 216 kW as opposed to 472 kW expected in conventional ways. The operation of fans is based on signals received from CO sensors which further reduces electrical consumption. Task Lighting at Each Workstation/ Daylight Harvesting Design/ Exterior LED Street Lights: The building envelope optimizes its daylight harvesting potential, thereby greatly reducing the energy requirement of the building. Efficient Lighting Design: Making maximum use of daylight helps to save a significant amount of energy. The 9-ft full height glazing coupled with a narrow floor plate - 79 ft in general and 59 ft in block F and G - provide tremendous potential for daylight harvesting. This potential has been fully utilized by nonobtrusive placement of enclosures like conference rooms and the use of intelligent lighting controls. Cutouts along the periphery wall in the basement and a large one at the centre of the building cut down the need for basement lighting during the daytime. The lighting system in the interiors incorporates dimmable ballasts, electronic ballasts, occupancy sensors, motion sensors and daylight sensors. These ensure that lights get switched on only when required. The general lighting level from the ceiling luminaries is fixed at 350 lux. The artificial lights can be dimmed up and down from 0% to 100% depending on the adequacy of available daylight to meet the 350 lux requirement. The task lights have a built-in occupancy sensor in conjunction with a continuous dimmer. Lighting of individual offices is controlled by combined daylight and occupancy sensors.


Exterior LED Based street lights: The project also showcases enhanced energy savings due to a LED based Outdoor Lighting system, which results in around 65% savings (in terms of wattage) when compared with a conventional scheme. All the outdoor lights are controlled through the Integrated Building Management System.

Materials To reduce impacts resulting from extraction and processing of new virgin materials, products with high recycle content are used, which measure to about 13.26% of the total value of the materials in the project. The use of PPC cement for non structural areas with fly ash, use of Rerolled reinforcement steel, Fly Ash Bricks, High recycled content carpets and modular ceilings are also a part of the Green design features. To support regional economy and reduce environmental impact resulting from transportation, around 80% of regional materials (within a radius of 800 km) are used in this project. Out of this around 20% of regional materials have been extracted and manufactured regionally. Rapidly renewable materials like Tarkett Bamboo flooring, Asis Board, Archidply, Interface Carpets, Cotton/ Jute carpets were used and amounted to 5.89% of the building material cost.


Indoor Environmental Quality The Suzlon One Earth team has taken measures to ensure a very high level of indoor environment in this project. Some of the Green features pertaining to IEQ are listed below 0 Campus is non smoking. 0 CO2 Sensors have been provided in densely occupied spaces and workstation areas to monitor and control CO2 levels inside the building. 0 HVAC system is designed for 30% additional ventilation rates required by ASHRAE Standard.

0 Low emitting materials - To reduce the quantity of indoor air contaminants Low Emitting Adhesives, Sealants, Paints and Carpets and composite wood products have been used. 0 3M Mats are being used at the entrances to prevent dust entering into the building. Separate exhausts for the photocopier rooms, separate plumbing at selected service rooms. 0 Task lights are provided for individual control for all the workstations and occupancy sensors are provided for all the areas such as cabins, meeting rooms and workstation areas. 0 For Thermal Control openable panels are provided in the glazing for more than 50% of building occupants. 0 Also there are remote controls for each Indoor VRV unit for thermal control. Multi occupant spaces provided with multi functional light module, DSI Smart Sensor occulux, CEFL PIR Occus switches. 0 More than 75 % of spaces have been designed to get daylight & more than 90% of occupants have views to outdoors. The workstations are designed with low partition for better external view. 0 The basement is designed to be an active part of the structure and not a dead end meant only as a parking area. It houses the cafeteria and the central plaza and receives useful daylight through punctures in the upper slab. The result of this approach is a sense of openness and visual connect in the basement, making the area activity oriented even while ensuring optimal use of space.


Climate 0 Pune has a tropical wet and dry climate with average temperatures ranging between 20 to 28 °C (68 to 82 °F). 0 Pune experiences


Documents

CII, hyderabad.. TERI banglore..... and SUZLON ONE EARTH case studies