Energy Efficiency...
Transcript of Energy Efficiency...
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Energy Efficiency through Architecture Design
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Built Environment consume vast amounts of our resources and threaten the ecological systems that support life.
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MORE THAN 50% OF ELECTRICITY GENERATED IN INDIA IS THROUGH FOSSIL FUEL
40% OF ENERGY IS CONSUMED BY BUILDING SECTOR ALONE
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Blackouts of July 2012 in India which left 680 million people—more than twice the population of the United States—without power, revealed the severity of the country’s ENERGY CRISIS.
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IN THE COMING DECADES, OUR PLANET WILL BE A VERY DIFFERENT PLACE.
By 2050, there will be an Additional 3 billion people on earth and 70% of the world's population will be living in URBAN AREAS.
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Energy costs are rising and are not likely to drop. While new technologies and renewable energy sources are
gaining in popularity, energy efficiency remains the easiest — and single most cost-effective — way to cut energy use.
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It helps reduce costs, reduce pollution, reduce greenhouse gas emissions and contribute to the company’s reputation as a socially responsible organization.
Energy efficiency is good for business.
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At all scales, for infrastructure to be sustainable it has to integrate and balance ecological, social and economic components of the community.
SUSTAINABILITY IS THE WAY FORWARD
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Building level- Green buildings
Neighborhood Level
City level
Region
Bottom up Approach
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So where do we agree ‘green benefits’ feature in the buyers checklist 1. Location 2. Location 3. Location 4. Affordability / Budget 5. Value for money 6. Developer Credibility 7. Etc. 8. Etc. 9. Etc.
SUSTAINABILITY AND ENVIRONMENTAL BENEFITS WON'T RESONATE WITH EVERYONE.
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BUYERS/ END-USER (RESIDENTIAL OR COMMERCIAL) EXPECT TANGIBLE BENEFITS.
Consumer’s interest in green building has tended to focus more on energy conservation - they want to reduce their heating, cooling and appliance costs.
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Populations in emerging markets are creating a huge demand for homes that need to be both Affordable and Green with best opportunities of health, wellbeing while maintaining environment responsibility.
DEMAND FOR HOUSING
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A CONSCIOUS EFFORT TOWARDS A GREENER FUTURE………
Lotus Boulevard intends to become a catalyst in community interaction offering best opportunity of health & rejuvenation while caring and conserving for the planet.
LOTUS BOULEVARD HOUSING, NOIDA
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CENTRAL GREEN SPINE
CENTRAL GREEN SPINE
CLUB BUILDING
BUSINESS CENTRE
CENT
RAL
GREE
N SP
INE
TOWERS
TOWERS
TOW
ERS
TOW
ERS
Iconic development at front enhancing IMAGIBILITY and Controlled development along the Central Greens.
Residential towers placed at periphery of development along the central green spine.
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COMMUNITY GREENS
PERSONAL SITOUTS AND COURTS
PRIVATE GREENS
Interconnected Interflowing Greens along Strong Visual Axis Lotus boulevard is unique in terms of how, through its planning, it has prioritized the regeneration of green spaces, healthy community living and pedestrian movement.
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Provides range of Social, Recreational and Health Amenities which are easily accessible within walking distance.
Total built-up area Towers - 59,84,684 sq.ft (including basement) Total built- up area CLUB Building– 1,25,000 sq.ft (including basement) Total built- up area Business Centre – 13,092 sq.ft
Creating WORK-LIVE situation
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Shaded seating spaces
Tot lots and play areas
Green Courts
Permeable parking lot
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Site Level Cluster Level
Tower Level
Unit Level
ENERGY EFFICIENCY
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MAKING NATURAL ENVIRONMENT AS INTEGRAL PART OF OUR DAILY LIVES……nature is a powerful tool.
Designing urban environment that respect & engage natural systems by bringing ecological infrastructure aesthetically to create more beautiful social spaces and sense of belonging and pride for the communities
BRINGING NATURE BACK..
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RAIN WATER HARVESTING & STORM WATER MANAGEMENT:
Addressing the issue of Heat Island Effect through green areas and permeable surfaces.
PERMEABLE SURFACE: To allows water to seep through ground and helps recharge ground water table.
SOLAR LIGHTING
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Nature does it all….Perfectly..
BIOSWALES:
Manage and treat storm water runoff from larger developments & hard surfaces. Allow storm water run-off to slowly infiltrate to the groundwater table
Designing urban environment that respect & engage natural systems by bringing ecological infrastructure aesthetically to create more beautiful spaces.
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STAGGERING OF TOWERS
FACILITATE WIND MOVEMENT MUTUAL SHADING CONNECTING GREEN COURTS
CLUSTER LEVEL
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BUILDING OPTIMIZATION TO REDUCE heating and cooling load.
Optimize orientation based on climate.
Optimize window area by orientation.
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Optimize shading condition by orientation.
Optimum window type. Proper installation, fixing details with wall.
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Lotus Boulevard uses both passive and active design strategies to reduce the energy load. Some of the passive design strategies used are proper building orientation, building planned as clusters for mutual shading, better day lighting and maximized natural ventilation.
Daylight analysis of various towers shows that all the dwelling units in residential towers achieve 2% daylight factor in more
than 75 % of all the regularly occupied areas
EXTERNAL VIEWS
EXTERNAL VIEWS
OVE
RLO
OKI
NG
UTI
LITY
ARE
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CROSS VENTILATION
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EFFICIENT BUILDING ENVELOPE DESIGN
HIGH PERFORMANCE WALL ASSEMBLY Use of AAC block for walls for better thermal insulation, use of high performance glass in club building.
HIGH PERFORMANCE ROOF ASSEMBLY : To minimize heat gain through roof, insulation, high Sri paints have been used along with insulation.
RCC SLAB
REFLECTIVE PAINT LAYER
BRICK BAT COBA
INSULATION
ROOF ASSEMBLY
OPTIMIZED WINDOW SIZE Window sizes are kept optimized in order to get maximum daylight & on the other side less heat ingression.
22% Window Wall Ratio
Window Assembly: Residential Towers - 5mm Clear Glass, SGU U-Value : 0.49 Btu./hr.ft², SC : 0.91, VLT : 79% Club House - 6mm High Performance glass U – Value 0.49 Btu/hrft² F, SC-0.61, VLT-60% Wall Assembly: Residential towers - 8” AAC block + plaster; U-value- 0.11 Btu/hr. ft² Club House - Internal Plaster + 9” th. R.C.C + external ACP cladding; U-value- 0.56 Btu/hr. ft² Roof Assembly: Residential & Club – Reflective paint + 5” brick bat coba + 6” RCC + 2” XPS under deck Insulation + false ceiling. Uvalue – 0.097 Btu/hr. ft² on all towers)
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GLASS OPTIMIZATION - CLUB BUILDING
2,700 2,750 2,800 2,850 2,900 2,950 3,000 3,050
SKN 154 SKN 174 SKN 754 SKN 474 SKN 454 Clear EVO star Nano KT 155
(MW
h)
Glazing Options
Annual Energy Consumption with different Glass Options
Without Daylight Sensor With Daylight Sensor
Glass code
Glass
Properties
SKN 154
Clear
SKN 174
Clear
SKN 754
Blue
SKN 474
Green
SKN 454
Green
EVO star
Clear
Nano KT 155
Moonshine
U- value
(Btu/hr-ft2-ºF) 0.264 0.281 0.264 0.281 0.264 0.563 0.327
Shading Coefficient 0.3 0.44 0.23 0.34 0.25 0.33 0.34
Visible Light Transmittance (%)
50 67 32 55 41 27 47
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Creat ing a benchmark in Green Bui ld ing des ign
Courtyard Planning for Natural Daylight and Ventilation. Optimized Building Design Stack Ventilation Use of Water Bodies for Evaporative Cooling Energy Efficient Building Envelope
Experimented with low embodied energy materials like CLC Blocks, Insulated Ferro-Cement Roof and Green Wall.
Lotus Boulevard Club Lotus Boulevard Business Center
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This building is designed around landscape courts keeping in mind the sun – path and prevailing wind direction to naturally daylight and ventilate interior spaces; it uses the concept of STACK VENTILATION - air is driven through the building by vertical pressure difference .
It is determined via simulation that the building achieves the required 2% daylight factor in 76.10 % of the regularly occupied areas.
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LEEWARD SIDE
This building uses the concept of STACK VENTILATION to naturally cool interior spaces - air is driven through the building by vertical pressure difference .
Increased velocity
Prevailing Wind Direction
Increased velocity
Decreased velocity
CFD Analysis Window opening is designed to facilitate Natural Ventilation, smaller openings in the windward direction and wider openings in the leeward direction.
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SOLAR ANALYSIS
Internal courts have large windows and concrete Jaali to allow diffused daylight and free flow of air movement.
East Facade - Windows shaded with vertical fins to reduce heat gain and allow maximum penetration of glare free daylight.
South Elevation – Big windows with horizontal projection to cut down the higher sun-angle yet allowing glare free daylight.
North Elevation - Big Windows to allow maximum daylight and external views.
West Facade - Optimized WWR to reduce heat gain, vertical fins to cut west sun.
North – South orientation Building is oriented such that the longer sides of the building face north- south as north receives minimum direct sunlight and south side has high sun which can be cut off with narrow vertical slits.
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Business center Provides an opportunity for women to work from home. Place for learning about the green living.
The building is planned around series of landscaped courts, to allow maximum external views, natural ventilation and daylight.
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SUN SHADE ANALYSIS
•Sun shading and daylight analysis is done to optimize window sizes for better daylight penetration.
•Large window windows on the north for glare free light and maximum external view of central green areas.
•Slit Windows on east-west façade to cut down low-angle sun.
•Selection of glass to allow maximum external view with reduced heat gain.
ENVIRONMENT ANALYSIS
DAYLIGHT ANALYSIS
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WIND PATTERN ON SITE
Window opening is designed to facilitate Natural Ventilation, smaller openings in the windward direction and wider openings in the leeward direction. Trees with flat & wide foliage should be planted in the NW direction of the building along with the water body, which shall pre-cool the air entering into the building. Huge & dense foliage tree on the SE direction of the building, for better air circulation
Ground Floor First Floor WIND ANALYSIS ENVIRONMENT ANALYSIS
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The building envelope is designed using low-embodied energy materials like CLC Blocks, ferro-cement roof, well insulated green wall on the periphery and the use of high performance glass to reduce the heat gain.
Green wall vertical wall to reduce heat gain
High SRI Paint to reduce Heat Island Effect
Vertical slit windows on east-west façade to reduce heat gain and allow glare free daylight penetration
Sun – Wind Analysis helped to identify best building orientation, optimized window sizes for better daylight penetration, maximize natural ventilation and external views.
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E N E R G Y E F F I C I E N C Y
Energy efficient building envelope.
Optimized WWR Energy Efficient Lighting Design. Solar hot water
Energy efficient equipment, energy metering
Efficient HVAC system for Club and Business Centre
AS PER ENERGY SIMULATION - The project achieves 3.55% energy saving over Ashrae base case through.
AS PER NATIONAL HOUSING BANK - The project achieves 18.5% energy saving over reference case.
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GREENOPOLIS HOUSING, GURGAON
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CENTRAL PUBLIC GREEN
COMMUNITY PRIVATE GREEN
LINEAR CONNECTING GREENS
TALLEST BUILDINGS ALINGNED ALONG CENTRAL MAJOR GREEN
TALLER BUILDINGS AT THE ENTRANCES AS ICONS
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Greenopolis is an innovative blend of usage of green techniques to create an eco-friendly habitat.
ZONE 5
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WIND ANALYSIS
FROM NORTH-WEST AT 3M HEIGHT
A r e a w i t h h i g h w i n d v e l o c i t y b e t w e e n w i n d s h a d o w a r e a
W i n d v e l o c i t y
i n c r e a s e s i n c o r n e r
W i n d s h a d o w a r e a a s t h e w i n d i s h i t t i n g f l a t s u r f a c e
W i n d s h a d o w
a r e a s W i n d s h a d o w
a r e a s
W i n d s h a d o w
a r e a s
W i n d v e l o c i t y
i n c r e a s e s i n c o r n e r
W i n d v e l o c i t y
i n c r e a s e s i n c o r n e r
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FROM NORTHWEST AT 10M HEIGHT
FROM NORTHWEST AT 40M HEIGHT
All the tower’s are oriented keeping in mind the prevailing wind direction to reduce the wind shadow effect and allow proper natural daylight and ventilation
FROM NORTHWEST AT 60M HEIGHT
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N
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Wind shadow area
Stilted areas facilitating wind movement
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ORIENTATION 1
ORIENTATION 2
75.8%
65.2%
78.6%
61.4%
77.1% 75.4%
78.2% 80.3% N
O R I E N TAT I O N A N A LY S I S
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N
D AY L I G H T A N A LY S I S 50.5%
51.4%
87.3%
88.0%
72.5%
73.0%
65.3%
67.5%
WINDOW OPTIMIZATION IS REQUIRED BEACUSE OF HUGE VARIATION IN DAYLIGHT FACTOR OF SAME UNITS AT DIFFERENT FLOORS
C R O S S V E N T I L AT I O N
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-2.9% 1.64% 0.42%
Glass 1 U-Value : 1.0 (Btu/hr.sqft F) SC : 0.97 VLT : 89% Glass 2 U-Value : 0.72 (Btu/hr.sqft F) SC : 0.97 VLT : 68% Glass 3 U-Value : .83 (Btu/hr.sqft F) SC : 0.78 VLT : 67%
BRICK WALL + CLEAR GLASS = INEFFICIENT ENVELOPE
BRICK WALL + HIGH PERFORMACE GLASS = EFFICIENT ENVELOPE
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Energy savings : 20 - 30 %
Water savings : 30 - 50%
The immediate and most tangible benefit are in the reduction in water and operating energy costs right from day one, during the entire life cycle of the building.
Green buildings have tremendous benefits.
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Is an evolved way of thinking and sustainable living. This highly energy efficient home works on the principle of utilizing renewable energy from sun and is independent of any electricity grid.
SHUNYA – A NET ZERO HOUSE
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Solar Photovoltaic
Roof Garden Solar Panel
Reclaimed Wood Fencing
Recycled Materials Floor Tiles
Insulated Wall Panels Water
Harvesting
Green Wall Double Glazed Window Panels
Insulated Roof Panels
Landscape Green
COURTYARD
Vegetable Garden
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Green Building Rating System stipulating Minimum Efficiency Performance Standards Policies promoting EE Appliances Energy Efficiency Labeling Incentive programs from Governments/ Private Bank
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THANK YOU CONTACT NO: 011- 46031500 Website: www.des-dev.co.in
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