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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