Climate Analysis report by Nirbhay Singh

COMPUTER APPLICATIONS AR-305

CLIMATE ANALYSIS REPORT SUBMITTED BYJUHI SRIVASTAVA (15110009) NIRBHAY SINGH (15110016)

COMPARATIVE ANALYSIS Tiruchirapalli Latitude:10.77 N Longitude:78.72 E Elevation:85 m Climate zone – warm humid

Fig.1.1 Dehradoon Latitude:30.32 N Longitude:78.03 E Elevation:682 m Climate Zone : composite

Fig.1.2

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TEMPERATURE Fig.2.1

Fig.2.2 Tiruchipalli Here the temperature bars mostly lie above the comfort zone indicating that the temperature is mostly higher than the comfortable range

Fig.2.3 Dehradoon The position of temperature bars deviate from the comfort zone in both the dirctions i.e. The place experience high range of temperature across the year.

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SKY COVER Fig.3.1

Tiruchipalli Mean annual sky cover is around 50-60 %. It is mostly clouded.

Fig.3.2

Fig.3.3 Dehradoon Here the mean annual sky cover lies in the range of 30-40 % .Hence the sky here is comparatively clearer.

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WIND VELOCITY

Tiruchipalli

Fig.4.1

Dehradoon

Fig.4.2

INFERENCE There is drastic difference between the wind velocity of the two cities. Tiruchipalli has comparitively very high wind velocity however in dehradoon the highest recorded are even quite low.

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3D TEMPERATURE CHART

Fig.5.1 Tiruchipalli

Fig.5.2

Dehradoon

Fig.5.3

INFERENCE The temperature range is mostly 27 to 38 in tiruchirapalli however in dehradoon temperature goes down to as low as 0 deg C

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DESIGN STRATEGIES

Tiruchipalli Major contributing design strategies are

Fig.6.1

Cooling and dehumidification 73.6 % Sun shading of windows 33.1 %

Dehradun Major contributing design strategies are

Fig.6.2

Cooling 25% ( Air conditioning can be reduced if design minimizes over-heating )Â Internal heat gain 22.9% (Hence insulation is required for winters) Sun shading of windows 20.1% (Glazing on south facade for winter sun with overhangs to cut-off summer sun) Passive solar direct gain high mass 12% (High mass interior surfaces feel naturally cool on hot days and reduce day-night temperature swings) Heating 11.5% Fan forced ventilation cooling 11%

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WIND WHEEL

Tiruchipalli The prominent wind direction is from south west and mostly hot winds.

Dehradoon Here the wind direction is nearly opposite and the wind is cold.Â

Fig.7.1

Fig.7.2

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FACADE ANALYSIS TRANSPORTATION DEPARTMENT West facade

Fig.8.1

SOLAR TOOL MODELEXISTING Horizontal over hangs – 600 mm Vertical louvers – 700mm (7 no.) at 120 degree angle to horizontal clockwise

Fig.8.2

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INTERVENTIONS

Fig.9.1- PROPOSED 1

Horizontal over hangs – 600 mm (2 no.) Vertical louvers – 700mm (5 no.) at 60 degree angle to horizontal clockwise

Fig.9.2-PROPOSED 2

Horizontal over hangs – 600 mm (2 no.) Vertical louvers – 600mm (2 no.) PAGE 9

SEASONAL OPTIMUM SHADING EXISTING MODEL WINTER

Fig 10.1 SUMMER

Fig.10.2

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SEASONAL OPTIMUM SHADING PROPOSED MODEL 1 WINTER

Fig.11.1 SUMMER

Fig.11.2

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SEASONAL OPTIMUM SHADING PROPOSED MODEL 2 WINTER

Fig.12.1 SUMMER

Fig.12.2

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EFFECTIVE SHADING COEFFICIENTS EXISTING MODEL

Fig.13.1 PROPOSAL 1

Fig.13.2

The shading coefficients of existing shading device is higher in winter and lower in summer To have optimum shading shading coefficient should be more in summer and less in winter Alternative 1 does exactly what needed for a particular building. It brings sufficient light and shade in summer and optimum comfort in winters

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FACADE ANALYSIS ELECTRICAL DEPARTMENT WEST FACADE

Fig.14.1 ECOTECT MODEL

Fig.14.2

Vertical louvers of 600 mm length and height runs along the windows. 1 horizontal over hang of 500 mm PAGEÂ 14

PASSIVE GAINS BREAKDOWN DOUBLE BRICK CAVITY PLASTER

U value- 1.45 Solar absorption-0.55

Fig.15.1

GAINS BREAKDOWN - All Visible Thermal Zones FROM: 1st January to 31st December CATEGORY LOSSES GAINS ------------ ------- -----FABRIC 47.0% 14.5% SOL-AIR 0.0% 17.2% SOLAR 0.0% 0.0% VENTILATION 26.1% 8.1% INTERNAL 0.0% 48.2% INTER-ZONAL 26.9% 12.1%

Fig.15.2

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PASSIVE GAINS BREAKDOWN BRICK PLASTER

Fig.16.1

GAINS BREAKDOWN - All Visible Thermal Zones FROM: 1st January to 31st December CATEGORY LOSSES GAINS ------------ ------- -----FABRIC 63.7% 21.2% SOL-AIR 0.0% 52.0% SOLAR 0.0% 0.0% VENTILATION 7.1% 2.3% INTERNAL 0.0% 14.0% Fig.16.2 U value – 2.62 Solar Absorption – 0.41

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PASSIVE GAINS BREAKDOWN Concrete block plaster

Fig.17.1

GAINS BREAKDOWN - All Visible Thermal Zones FROM: 1st January to 31st December CATEGORY LOSSES GAINS ------------ ------- -----FABRIC 61.4% 17.7% SOL-AIR 0.0% 42.5% SOLAR 0.0% 0.0% VENTILATION 16.9% 4.9% INTERNAL 0.0% 29.1% INTER-ZONAL 21.7% 5.8%

Fig.17.2

U value – 0.7 Solar absorption – 0.50

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PASSIVE GAINS BREAKDOWN Comparative Analysis

Absolute heat gain through conduction in Brick plaster >> Concrete block plaster > Double brick cavity plaster Absolute heat gain through SOL-AIR in Brick plaster >> Concrete block plaster >>Double brick cavity plaster Absolute Internal heat gain in Brick plaster >> Concrete block plaster >>Double brick cavity plaster U value of brick plaster is greater than other two, That's why all conduction values are higher in brick Solar heat gain independent of U-value , That's why it is constant. PAGE 18

FABRIC GAINS (QC + QS) DOUBLE BRICK CAVITY PLASTER Double brick cavity plaster U- 1.45, Solar absorption – 0.55

Fig18.1

Fig.18.2

Fig.18.3

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FABRIC GAINS (QC + QS) Brick Plaster U- 2.6, Solar absorption -0.41

Fig.19.1

Fig.8.1

Fig.19.2

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FABRIC GAINS (QC + QS) Concrete block plaster

U – 0.7, Solar absorption – 0.51

Fig.20.1

Fig.20.2

INFERENCES U value of brick is greater among all three.Thats why the Fabric gain occurs in Brick plaster >> Concrete block plaster > Double brick cavity plaster

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INSOLATION Material - brick West Facade

-exposure to the sun's rays. -the amount of solar radiation reaching a given area.

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INSOLATION Material - brick West Facade

AverageÂ Daily values

Amount of solar radiation on exposed area is much grater than that on the unexposed area. Values on unexposed surface are nearly constant.

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INSOLATION Material - brick West Facade

AVG HOURLY VALUES

Month - December

Month - May

INSOLATION IN MAY > DEC PAGE 24

BUILDING ANALYSIS Location : Roorkee, Uttarakhand Lat / Long : 29.85 N, 77.88 E Building Type : Residential

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BUILDING ANALYSIS Location : Roorkee, Uttarakhand Lat / Long : 29.85 N, 77.88 E Building Type : Residential

Wall conduction has the maximum impact on power consumption Increasing the wall insulation and glazing u factor to 3 panel decreses the power consumption to 60 kw. PAGE 26

DAYLIGHT ANALYSIS

10th December, 10 am

Location : Roorkee, Uttarakhand 10th may , 10 am

Rooms having south facade experience maximum daylight Glazed facade increases the daylight factor and similarly day lighting PAGEÂ 27

ALTERNATIVE ROOF AND PLAN FORM

Building Type : Residential

Location : Shimla

Location :Â New Delhi

With the same wall material's properties New Delhi has more power consumption than Shimla due to its extreme climatc conditions as well as more humid environment. Adding vertical louvers has significant impact on reducing heating load PAGEÂ 28

LOCATION : SHIMLA

Location :Â New Delhi

On increasing the wall and floor insulation and glazing u factor to 3 panel the power consumption witnessed a huge change to 72 KW from 117 KW particularly possible in Hilly Areas.

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DAYLIGHT ANALYSIS

Location : Shimla

10th December, 10 am

10th may , 10 am

Having Courtyard increases the daylighting tremendously. In Winters we experience more daylight than summers. Most of the spaces are in comfortable zone with sufficient daylight. PAGEÂ 30

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