JAISALMERWEATHER ANALYSIS USING ECOTECT SOFTWARE

Suchetana Chakravarty114AR00256th semester, NIT Rourkela

LOCATION DATAlocation : Jaisalmer ,IndiaLatitude : 26.9 , longitude : 70.9Altitude (meters above sea level): 242 meters

District JAISALMER has a very dry climate with very hot summer; a cold winter and sparse rains.The climate is extremely hot during summer with maximum temperature reaching up to 49.2 degree Celsius and extremely cold during winter with minimum temp. in the range of 1 degree Celsius.

SOLAR POSITION • Best orientation of the building

is south at 185 degree• Worst orientation of the building

is east at 95 degree

solutionAs Jaisalmer is has very high temperature and high solar radiation ,All the building should be faced to south to avoid maximum solar radiation.• Sun shading device should be

provided

CREATE SUN SHADING DEVICE

DESIGN SOLUTION•Dense clustering of buildings•Sun control through orientation and structural projections •Cooling of sunlit surfaces by using fins•Massive construction for roofs and walls•Courtyards and other air ducts for ventilation.•major streets oriented to E-W and minor streets are right angle to these. • compact structure of the housing doesn’t allow the sun rays to penetrate , and also serve as device of shading.

ANNUAL SOLAR RADIATION • During April May June, the

building will get the minimum solar radiation

• During winter month Dec ,jan, Feb. it will get the maximum heat which is necessary for Jaisalmer .

COMFORT PERCENTAGE ACCORDING TO ACTIVITY

DIRECT SOLAR RADIATIONDirect solar radiation is very high ConclusionUse of shading devices to protect from sunlight

PASSIVE SOLAR HEATING

• The activity level is affecting the solar heating gained in the building

• The solar radiation is increasing if the glazing ration of the building is high

solutionThe solar radiation should not be high inside the building so less glazing should be used in Jaisalmer building

DIFFERENT TYPES OF COOLING TECHNIQUES

Conclusion30 -40DBT ventilation evaporation is the best way of cooling . • In Jaisalmer use of jails

is the best for ventilation.

DESIGN SOLUTION 1. Dense clustering of buildings. 2. Sun control through orientation and structural projections. 3. Cooling of sunlit surfaces by use of fins. 4. Massive construction for roofs and walls. 5. Courtyards and other air ducts for ventilation. The effectiveness of each of these cooling methods has been evaluated by temperature observations and this will be reported in a subsequent paper.

WIND PATTERN THROUGH OUT THE YEAR AT 9AM &3PM

ConclusionMost of the wind comes from south-west direction.Window at the south-west side should be bigger.

USE OF AIR DUCT The picture shows the wind circulation in the air duct of the havelli, which is the method to keep the haveli’s cool.

Articulated façade of haveli

SUMMER WINTER

In summer high speed wind (415+/hrs) blows from west-south at 220 degree.

In winter high speed wind comes from north-east direction.

PREVAILING WINDS THROUGH OUT THE YEAR DURING SUMMER

ConclusionThrough out the year max. prevailing wind comes from south west direction.• The window

should be bigger at the south west side

PREVAILING WINDSPrevailing winds through out the year• Rainfall is very less• Avg. relative

humidity is also very low

• The temperature of the wind is very high

• Hot wind flows from the north-west side

SolutionWaterbody,Courtyard inside house which cools the wind

COURTYARD IN JAISALMER HOUSES

MONTHLY DIURNAL AVERAGES OF TEMPERATURE

• Max temperature is in the month of may ,june

•

TEMPERATURE • Temperature in the month of June is the highest

which is near 45 degree centigrade

ConclusionCrate a micro climate with help of water body which can cool the building in hot summer

Hottest day

COLDEST DAY

Conclusion• The coldest dy in Jaisalmer is near 5 degree.• Which concludes high thermal insulation inside the building is

necessary• Cavity wall can insulate the heat .

CLOUD COVER IN WINTER

ConclusionCloud cover is not much, mainly bright and sunny days are seen in jaisalmer

RELATIVE HUMIDITY Humidity is very lessIn the month of April, may relative humidity is very lessMax. humidity is 100% during month of July, august

Rainfall is very less Conclusion • Water saving bauli can be

made inside the house

DRY BULB TEMPERATURE IN WINTER & SUMMER SEASON

2 4 6 8 10 12 14 16 18 20 22 24-10 0.0k

0 0.2k

10 0.4k

20 0.6k

30 0.8k

40 1.0k

°C W/m²DAILY CONDITIONS - 1st J anuary (1)

LEGEND

TemperatureRel.Humidity

Direct SolarDiffuse Solar

Wind Speed Cloud Cover

Comfort: Thermal Neutrality

Jan14th 28th

Feb14th 28th

Mar14th 28th

Apr14th 28th

May14th 28th

Jun14th 28th

J ul14th 28th

Aug14th 28th

Sep14th 28th

Oct14th 28th

Nov14th 28th

Dec14th 28th

1st J anuary to 31st December

-10 -10

0 0

10 10

20 20

30 30

40 40

°C °CDRY BULB TEMPERATURE - J aisalmer, IND

2 4 6 8 10 12 14 16 18 20 22 24-10 0.0k

0 0.2k

10 0.4k

20 0.6k

30 0.8k

40 1.0k

°C W/m²DAILY CONDITIONS - 1st J anuary (1)

LEGENDTemperatureRel.Humidity

Direct SolarDiffuse Solar

Wind Speed Cloud Cover

J an14th 28th

Feb14th 28th

Mar14th 28th

Apr14th 28th

May14th 28th

J un14th 28th

J ul14th 28th

Aug14th 28th

Sep14th 28th

Oct14th 28th

Nov14th 28th

Dec14th 28th

1st J anuary to 31st December

-10 -10

0 0

10 10

20 20

30 30

40 40

°C °CWET BULB TEMPERATURE - J aisalmer, IND

WEAKLY DATA OF CLIMATIC ELEMENTS

Thank you