Energy Efficiency throughtest.nhb.org.in/Events/Energy-Efficiency-through-Architecture-Design.pdf · GREENS Interconnected Interflowing Greens along Strong Visual Axis Lotus boulevard

Energy Efficiency through Architecture Design

Built Environment consume vast amounts of our resources and threaten the ecological systems that support life.

MORE THAN 50% OF ELECTRICITY GENERATED IN INDIA IS THROUGH FOSSIL FUEL

40% OF ENERGY IS CONSUMED BY BUILDING SECTOR ALONE

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.

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.

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.

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.

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

Building level- Green buildings

Neighborhood Level

City level

Region

Bottom up Approach

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.

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.

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

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

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.

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.

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

Shaded seating spaces

Tot lots and play areas

Green Courts

Permeable parking lot

Site Level Cluster Level

Tower Level

Unit Level

ENERGY EFFICIENCY

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..

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

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.

STAGGERING OF TOWERS

FACILITATE WIND MOVEMENT MUTUAL SHADING CONNECTING GREEN COURTS

CLUSTER LEVEL

BUILDING OPTIMIZATION TO REDUCE heating and cooling load.

Optimize orientation based on climate.

Optimize window area by orientation.

Optimize shading condition by orientation.

Optimum window type. Proper installation, fixing details with wall.

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

AS

CROSS VENTILATION

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)

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

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

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.

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.

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.

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.

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

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

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.

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.

GREENOPOLIS HOUSING, GURGAON

CENTRAL PUBLIC GREEN

COMMUNITY PRIVATE GREEN

LINEAR CONNECTING GREENS

TALLEST BUILDINGS ALINGNED ALONG CENTRAL MAJOR GREEN

TALLER BUILDINGS AT THE ENTRANCES AS ICONS

N

Greenopolis is an innovative blend of usage of green techniques to create an eco-friendly habitat.

ZONE 5

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

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

N

Wind shadow area

Stilted areas facilitating wind movement

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

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

-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

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.

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

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

Green Building Rating System stipulating Minimum Efficiency Performance Standards Policies promoting EE Appliances Energy Efficiency Labeling Incentive programs from Governments/ Private Bank

THANK YOU CONTACT NO: 011- 46031500 Website: www.des-dev.co.in

Slide Number 1Slide Number 2Slide Number 3Slide Number 4Slide Number 5Slide Number 6Slide Number 7Slide Number 8Slide Number 9Slide Number 10Slide Number 11Slide Number 12Slide Number 13Slide Number 14Slide Number 15Slide Number 16Slide Number 17Slide Number 18Slide Number 19Slide Number 20Slide Number 21Slide Number 22Slide Number 23Slide Number 24Slide Number 25Slide Number 26Slide Number 27Slide Number 28Slide Number 29Slide Number 30Slide Number 31Slide Number 32Slide Number 33Slide Number 34Slide Number 35Slide Number 36Slide Number 37Slide Number 38Slide Number 39Slide Number 40Slide Number 41Slide Number 42Slide Number 43Slide Number 44Slide Number 45Slide Number 46Slide Number 47Slide Number 48Slide Number 49Slide Number 50Slide Number 51Slide Number 52Slide Number 53Slide Number 54Slide Number 55