Redevelopment of of Dharavi Slums

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Redevelopment of of Dharavi Slums

J Joel Samuel,

Vit University,Vellore

Kishore M,

Vit University,Vellore

Akash R,

Vit University,Vellore

Vaibhav Venkat, Vit University,Vellore

Abstract Dharavi, Asias largest slum is a home to nearly 700,000 to 1 million people, with an inordinate population density of 277,136 per square km. The dearth of hygiene, miniature homes, low income and lack of awareness has exacerbated the living conditions in the Dharavi dwelling. This paper proposes a synergistic redevelopment model for the

rehabilitation of the local community. In addition, thermal analysis has been carried out for redeveloped model. This paper suggests a sustainable redevelopment approach by draping the new buildings with acopiously growing tropical creeper Vernonia elaeagnifolia. This results in a drop of 3.30C, around noon. The HVAC loads showed a decrease resulting in an annual saving of $614.14.

  1. INTRODUCTION

    Dharavi is locality in Mumbai, Maharashtra, India. It is spread over 557 acres and houses nearly a million people. The present day living conditions of Dharavi are very poor, and the ever rising temperatures in urban areas is another major issue faced by the slum dwellers. We have proposed a synergistic redevelopment model for the rehabilitation of the local community. In addition, we have carried out thermal analysis for redeveloped model. This paper suggests a sustainable redevelopment approach bydraping the new buildings with a copiously growing tropical creeper Vernonia elaeagnifolia. This results in a drop of 3.30C, around noon. The HVAC loads showed a decrease resulting in an annual saving of $614.14.

  2. THE PLAN FOLLOWED BY FOR REDEVELOPMENT IS THE ONE SUGGESTED BY INDIAN ARCHITECT MUKESH MEHTA.

Sketch up model

ECOTECT MODEL:

Sides Receiving Direct Sunlight

The sides requiring shading is found out using

the sun path diagram at the co- ordinates of Dharavi (19.042N 72.85E).

Basic Sketch of Room [2]

Green colour -Vernonia Elaegnifolia drapes 3cm thickness Yellow Brick concrete Block Plaster

ENERGY REQUIRED FOR HEATING AND COOLING DURING DIFFERENT MONTHS

Without drapes

With drapes [6]

HVAC DATA

Without greendrapes Concrete block plaster walls

HEATING COOLING ELECTRIC GAS FOSSIL FUEL total

MONTH

(Wh)

(Wh)

(Wh)

(Wh)

(Wh)

——

——–

——–

———

—–

————

Jan

866398

179712

0

0

0

1046110

Feb

530116

587665

0

0

0

1117781

Mar

290091

2340692

0

0

0

2630783

Apr

23071

4281344

0

0

0

4304415

May

0

5395574

0

0

0

5395574

Jun

0

5354172

0

0

0

5354172

Jul

0

4608399

0

0

0

4608399

Aug

0

4399482

0

0

0

4399482

Sep

0

4255898

0

0

0

4255898

Oct

28463

3779847

0

0

0

3808310

Nov

325165

1808992

0

0

0

2134157

Dec

971321

272535

0

0

0

1243856

NET

40298937

40298.937kW

With green drapes covered on Two sides with Direct solar exposure

HEATING

COOLING

ELECTRIC

GAS

FOSSIL FUEL

TOTAL

MONTH

(Wh)

(Wh)

(Wh)

(Wh)

(Wh)

——

——–

——–

———

—–

———–

Jan

2397773

577993

0

0

0

2975766

Feb

1022583

581398

0

0

0

1603981

Mar

320692

927574

0

0

0

1248266

Apr

3150

2128076

0

0

0

2131226

May

0

3779274

0

0

0

3779274

Jun

0

4413151

0

0

0

4413151

Jul

0

2929142

0

0

0

2929142

Aug

0

2394686

0

0

0

2394686

Sep

0

2116856

0

0

0

2116856

Oct

0

1271528

0

0

0

1271528

Nov

473975

777390

0

0

0

1251365

Dec

2192060

581050

0

0

0

2773110

NET

28888351

28888.351kW

Graphs [4]

Energy Savings

EB(Rs3.5/unit)

without drapes

40298.937kW

141046

with drapes

28888.351kW

101109

Savings

11410.019kW

Rs39936

cost savind USD(65Rs/$)

$614.41

Energy Plus Simulation:

The google sketch up model input for energy plus simulation was:

Input IDF file for energy plus simulation

A midrise apartment was considered, four story, having 31 apartments and an office.

The parameters were as follows:

The construction materials chosen were as follows

The no of people per apartment was chosen to be four. The electric loads were also defined as follows:

A layout of the 31 apartments and their HVAC loads

Weather file was imported as well. The following results were obtained. [6]

CONCLUSION

We find that the interior temperature of room is lesser when two of the sides of walls are covered with drapes. The maximum drop in temperature was during 12pm, of about 3.3 deg celcius.

This drop in temperature reduces energy consumption which in turn saves a large amount of money for redeveloped Dharavi township.

The shift towards blue side in the PMV values also indicate the comfort.

The desired temperature band for calculations was taken as 18-26 degree Celsius.

The required HVAC loads were calculated for thermal comfort of 5 people in each apartment which was airconditioned for 18hrs during weekends and 16 hours during working days.

It is observed that the rooms consumption is decreased especially during the summer due to the temperatue drop by evapotranspiration of green drapes of Vernonia Elaegnifolia which in turn reduces the internal temperature within rooms.

It is found that annual reduction in electricity bill of Rs 39936 was observed which is USD614.41 each year per household.Therefore for the 14000 households in Dharavi the savings would be USD8,601,740 annually.

ACKNOWLEDGEMENT

A project provides us an opportunity to have a greater understanding of the subject and explore beyond the book. On this occasion, we would like to express our heartfelt gratitude to out faculty, Dr. Satyajit Ghosh for his guidance and encouragement throughout this project.

Additionally, we are grateful to the VIT University Management and our School Deanfor giving us an opportunity to carry out this project. It has enhanced our practical knowledge and exemplified the process of making an engineer.

REFERENCES

  1. The credibility of slums : Informal housing and urban governance in India

  2. Numerical study of mixed convective heat transfer coefficient for building cluster

  3. Analysis of Convective Heat Transfer in Building Facades in Street Canyons

  4. Study on heat transfer experiments and mathematical models of the energy pile of building

  5. Froude Stanton modeling of heat and mass transfer in large vertical spaces of high-rise buildings

  6. Electricity access in urban slum households of Bangladesh : A case of Dhaka

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