PROJECTS REPORT

ECOTECT ANALYSIS

CITY : NEW DELHI

LATITUDE: 28° 6‘ N

LONGITUDE: 77° 2‘ E.

ALTITUDE: 216 M

TIME ZONE: +5.5 Hours

SAI SREEMAYEE SOOD

ROLL NO. 17

FIFTH YEAR STUDIO

CLIMATE OF THE SITE Below shown is a summary of the site climate showing the radiation, temperature, wind and the degree of heating, cooling and solar.

OVERHEATED PERIOD IS FROM APRIL TO JUNE AND UNDERHEATED IS

FROM DECEMBER TO FEBURARY ORIENTATION IS BASED ON THE AVERAGE DAILY INCIDENT ON A VERTICAL SURFACE

BEST ORIENTATION MAX HEAT GAIN IS 10 DEGREE DUE EAST THE BUILDING NEEDS TO BE ROTATED 10 DEG IN North-East DIRECTON.

SUN PATH DIAGRAMS

21st June

21st September

21st December

The sun path diagrams have been analyzed for

the time 12:00pm at 21st June, 21st September and

21st December respectively.

The sun path diagrams have been analyzed for the

time 4:00pm at 21st June, 21st September and 21st

December respectively.

Incident solar radiation is maximum in june and july.

Incident solar radiation is minimum in jan and dec.

WIND ANALYSIS THE WINDS MOSTLY BLOW FROM THE WEST AND NORTH WEST DIRECTIONS ONLY IN MONSOON IT BLOWS FROM EAST

OR SOUTH DIRECTIONS.

The strongest winds blow from North West. Winds coming from West are the hottest while those coming from North-East are the coldest. Winds blowing from South West are humid while those coming from North East are dry.

AVERAGE FREQUENCY THROUGHOUT THE YEAR Rainfalls are prevalent in the months of july, august and september.

AVERAGE HUMIDITY THROUGHOUT THE YEAR Humid winds blow primarily in the months of July and August from South West as well as North East.

AVERAGE TEMPERATURE THROUGHOUT THE YEAR Winds are the hottest in the months of June and July, majorly in the Northern part. The coldest winds blow in December

and January.

COMFORT PERCENTAGES NAME :DELHI LOCATION :INDIA POSITION :28.6 DEG, 77.2 DEG SELECTED DESIGN TECHNIQUES PASSIVE SOLAR HEATING THERMAL MASS EFFECTS NATURAL VENTILATION

PSYCHROMETRIC CHART THE COMFORT BAND EXPANDS HORIZONTALLY WHEN THERE IS THERMAL MASS EFFECT AND NIGHT PURGE

VENTILATION WHERAS IT EAPANDS VERTICALLY UP WHEN NATURAL VENTILATION STRATEGY IS USED INDICATING THE

STRATEGIES BEING GOOD FOR THE BUILDING

EXPANDED COMFORT ZONES DUE TO PASSIVE STRATERGY.

PSY

CH

RO

MET

RIC

DA

TA

THE THIN BLUE LINE RUNNING THROUGH THE MIDDLE OF THE RED GRADIENT IS

THE AVERAGE TEMPERATURE. MAX ACHIEVED IN MAY AND LOWEST

ACHIEVED IN DEC.

THE RED GRADIENT SHOWS A RANGE OF THE EXTREMES.

THE GREEN BAND IS THE COMFORT ZONE. IT IS BEING ACHIEVED IN THE

MONTHS OF MAR, APRIL, JUN, JULY, AUG, SEPT AND OCT.

HOURLY DATA

WEEKLY DATA

SHADOW RANGE ON SITE 22ND DECEMBER

9:00 – 16:00

SHADOW RANGE ON SITE 21ST JUNE

8:00 – 18:00

SHADOW RANGE OF BLOCK AND PIT 21ST JUNE

8:00 – 18:00

SHADOW RANGE OF SITE AND PIT 22ND DECEMBER

9:00 – 16:00

INCIDENT SOLAR RADIATION

DAYLIGHT ANALYSIS

SPATIAL COMFORT ANALYSIS

PASSIVE DESIGN STRATEGIES

New Delhi lies in the humid subtropical climate and hence becomes a difficult zone to design

strategies for. This zone experiences two or three different seasons each of which is uncomfortable.

We need to provide for all of them.

So, we identify the most uncomfortable season to evolve out the design strategies. As, in case of

Delhi, summers remain for a prolonged period, the design strategies will be evolved out of it.

SHADING

• The building envelope - The building should be oriented east-west with its longer axis as it will

receive the maximum solar radiation in the winter and minimum in summer.

• High ceilings – Let the hot air rise above so that the room feels cooler to the occupants.

• Cover openings on west and east ends. Use few windows and doors. For openings use vertical

sunscreens, climbing vines, or shrubs to reduce heat gain on western walls.

• Use white or light colors that stay cooler on sunny walls, roof, and pavement.

VENTILATION

• The reduction of heat gains by radiation and the utilization of air movements to remove heat gain

from the building elements and to assist the human organism (finding temperature balance by

evaporative cooling).

• Shading of all openings and outdoor spaces next to the building is desirable. Orientation of

buildings and openings to allow good cross-ventilation of rooms and ventilated roof spaces by

natural prevailing air movements.

• Openings in the most directly facades should be avoided (especially sleeping room windows in

west facades) or very carefully shaded.

• Pull breezes in with wing-walls, and shutters or casement windows that open outward. Although

jalousie windows allow ventilation by keeping rain out while they are open, casements under an

overhang can be helpful to catch breezes. A sturdy adjustable shutter that pivots vertically in the

center of the window sill may be able to secure a building and catch breezes too.

Screen porches or verandahs to allow openings to unscreened windows in

• the center of the building.

PLANTINGS

• Tall trees can shade roofs and reduce temperatures. Trees, shrubs and vines that shade the ground or buildings in the afternoon reduce the local temperature. Plants cool by evaporating moisture as well as by shading, like natural air conditioners. Use trees like palms that are open underneath on the breezy side.

• Don't make sun traps of heavy walls around sunny paved areas. Locate plantings between walls and other paved areas when possible.

• Use green walls for breezy west walls. Vines block breezes and will grow over openings. A

green wall of low-growing plants can lower the wall temperature. Plants can be planted into concrete vent blocks filled with soil after construction. The wall itself should be waterproof, because the wall may need some irrigation.

• Funnel breezes with building walls or plants: Breezes are slowed by friction. If buildings must be close together, use them to aim and speed up the breeze.

INSULATION • Keep attic heat out by using a vented roof and an insulated ceiling. If air can

flow up inside the roof and out vents above, the roof stays cooler. Reflective foil draped across the rafters help, or insulation made of materials that don't soak up humidity.

• Keep coolness out of the walls: Use insulation at the base of masonry walls to stop them being cooled by the soil below, which causes condensation.

• Use light-weight or well-insulated materials so the building won't feel hot.