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Concept for Solar Street Lights

Preface

Mega city Dhaka is becoming one of the fastest growing cities and one of the poorest as in many other developing countries .This year, the world will pass a milestone so profoundly significant that 2012 will become a touchstone for future historians. For the first time, more people will be living in cities than in the country. The individual who tips the scales might be a baby born to a city dweller or an adult migrating from the countryside, the newcomer will have arrived in a Third World slum. By 2030, an estimated 5 billion of the world's 8.1 billion people will live in cities. About 2 billion of them will live in slums. Primarily in Dhaka, lacking access to lighting facilities, clean drinking water and working toilets, surrounded by desperation and crime. By the United Nation's definition, the slum residents are missing at least some of the following: durable walls, a secure lease or title, adequate living space, and access to safe drinking water and toilets. The largest study ever made of global urban conditions has found that 940 million people - almost one-sixth of the world's population - already live in neglected, unhealthy areas, mostly without electricity, water, sanitation, public services.

The report, from the UN human settlements program, UN-habitat, based in Nairobi, found that urban slums were growing faster than expected, and that the balance of global poverty was shifting rapidly from the countryside to cities. The worst urban conditions are in Asia, specially in Bangladesh what the UN calls unacceptable conditions. Near about 4500 slums are in and around Dhaka mega city and almost one-third of the population are living in slums. The Urban Partnership for Poverty Reduction Project (UPPRP) has intended to improve the livelihoods and living conditions of more than three million urban poor peoples in Bangladesh during 2015. As part of this broader objective Dhaka North and Dhaka South City Corporation has recently planned to develop the present condition of 5,00,000 people in during the project period.

The supply of electricity is less than the demand in Bangladesh. Government of Bangladesh has undertaken a good number of initiatives to mitigate the power supply problem. Power supply problem disrupts the production and economic activities in Bangladesh which affects the GDP and export. Consequently foreign currency earning is affected. The basic amenities are absent in the slums where the major problem is power supply. The major lands of slums are apparently public. In others, the newest, poorest arrivals rent space from more-established squatter. A byproduct of this diminishing supply of free land is that new arrivals move onto more marginal land: flood-prone flats in Dhaka. As there is no legal document presented for land ownership so the authority of Power supply of could not provide any electrification facility for the slum dwellers. The proposed solar power will contribute to mitigate some demand of power/electricity to the slum inhabitant. Definitely the addedsolar power supply will contribute the national GDP and livelihood improvement of the slum dwellers migrated from the southern part and middle part of Bangladesh where there are a good numbers of river in this part of the country. The climate change causes cyclone, storm, cidor and Ila. The slum dwellers are migrated from those area of Bangladesh to the slumsin Dhaka mega city.

However, of those lacking, electricity is important for the quality of life of the slum-dwellers, and is a path towards further development. For a variety of sociological, infrastructural, and economic reasons, traditional electric service is not available in the slums. A unique solution to this problem is the use of renewable distributed generation technologies, specifically solar photovoltaic. Because they are flexible, cheap, suited for Dhaka's climate, and empower the community, solar arrays should be madeavailable through development projects of socio-Economicai development of slum-dwellers in Dhaka. This paper Concept Paper proposes how to implement Solar Street Lights by benefitting the slum dwellers in the city of Dhaka as a case study.

Benefits:

The demand for electricity is immense among slum-dwellers. Benefits of Solar Street Lights for the slum dwellers are:
(1) Direct effects on well-being;
(2) Direct effects on mobility of dwellers;
(3) Trickle-down effects of increased productivity.

Why solar street lights

1) After initial investment, total produced electricity is free.
2) Clean, renewable energy source.
3) Long lasting, with 20 years facility, no transmission costs & environment friendly.
4) As slums are not connected with national grid line, they have basic rights to get lightings at night. We can provide sustainable and cheaper lighting for them in the roadside area.
5) It can be considered that slum dwellers are living in off grid areas. So they are deprived of conventional Electric Street Lights. Under this situation, Implementation of Solar Street Lights can solve such deficient of street lighting.
6) The purpose of roadway lighting is to attain a level of visibility which enables the pedestrian to see quickly, distinctly, and with certainty all significant roadway details, such as the alignment of the road (its direction and its surroundings) and any obstacles the roadway.
7) There is a positive environmental impact as opposed to a negative one;
8) Power outages have no impact whatsoever on street lighting in the area;
9) Solar street lights can be easily erected in almost all locations within shortest possible time.


Technology:

For greener and cheaper sustainable energy Solar Street Light incorporates Solar LED Lights, Solar Panels, Battery, Charge Controller, Pole and Other necessary accessories like cable, screw, mechanical Structures etc. Purpose of each of major components is described as follows:

Solar Panel:
A solar panel is a collection of solar cells. Lots of small solar cells spread over a large area can work together to provide enough power to be useful. The more light that hits a cell, the more electricity it produces.

Charge Controller:
A solar charge controller is needed in virtually all solar power systems that utilize batteries. The job of the solar charge controller is to regulate the power going from the solar panels to the batteries. Overcharging batteries will at the least significantly reduce battery life and at worst damage the batteries to the point that they are unusable.(Specification given)

Battery:
Solar Batteries (Deep Cycle Batteries) are a key component in a stand-alone renewable energy system. In renewable energy systems, deep cycle batteries provide the energy storage for the system. (Specification given)

SMD-LED Light:
LED Lights can improve dramatic security concern and livelihood environmental friendly condition. It is environment friendly, longlasting- more than ten years life span. Very efficiency compared to toxic CFL bulbs.

Solar SMD-LED Lights:
For greener, cheaper sustainable lighting Super saver Electronics has introduced Eco-Light (SMD-LED) as alternative source of conventional lighting system. The lighting system is highly energy saving comparatively those existing lights are in the market. The light is long lasting (minimum 10 years), water resistive & non breakable. Even it is almost environment friendly compare to any conventional light. Bellow we set some comparisons of the light with other conventional lights:


Comparison of SMD-LED Light with other lights:


1. Energy Efficiency:

Lighting Device
Wattage
Lumen/watt
Life span
Heat Emitted
Incandescent 100w
100
10
1000hr
85 btu's/hr
Florescent ( Tube Light) 40w
40
15
2000hr
65  btu's/hr
Energy(CFL)   28w
23
20
5000hr
30  btu's/hr
SMD LED  9w
6
90
50,000hr
2343.4  btu's/hr


2. Environmental Efficiency:

Lighting Device
Carbon
Mercury
Ultra Violet
Infra Red
Incandescent 100w
150 lb/year
Nil
No
No
Florescent ( Tube Light) 40w
83.3 lb/year
5mg/lamp
Yes
Yes
Energy(CFL)   23w
35 lb/year
5mg/lamp
Yes
Yes
SMD LED  9w
7.5 lb/year
Nil
No
No

We found that, in a premise where 100 Tube Lights are used for 16 hours a day @ 4.5 Tk/ unit, it will cost electricity bill for 1,42,000 Taka yearly. You can pay only 23 thousand Taka using our light for the same brightness.

Activities under the idea

Following activities shall be carried out in order to implement the project turnkey basis:
• realistic Site Survey;
• Submitting offer for acceptance by slum development department of DNCC;
• Civil works for pole erection;
• Construction work-slab preparation;
• Solar panel mounting structure design and construction;
• Light frame design, construction and mounting;
• Street light pole placement and assemble mounting structure;
• Control unit design and placement;
• Solar panel placement on mounting structure;
• Battery placement;
• Electrical connections;
• Operation of street light;
• Commissioning of street lights;
• Periodic maintenance for a year.

Maintenance of the solar street light

We are offering free supervision & periodic maintenance for first one year of operation. That will carry preventive operation and maintenance services for the photovoltaic facility will have the following characteristics: They will be conducted in accordance with the operation and maintenance manual written for that purpose, which indicates the recommended works from Photovoltaic Module, Battery and Charge Controller manufacturers, to keep operating conditions, benefits, protection and durability within acceptable limits. There will be Three Annual visits as Free of Charge basis for One Year, effective from Project commissioning to the authority. Last words Our attempt with Solar Street Lights meets with only a part of demand by slums condition in Dhaka City. Many more attempts are underway with Dhaka City Corporation, As renewable distributed generation technologies can provide sustainable energy services for the slum-dwellers of Dhaka. It will then proceed to suggest that Solar photovoltaic power are uniquely able to address the difficulties of electrifying the slums of Dhaka, and similar slums situated in other part of the country. The proposed solar power will contribute to mitigate some demand of power/electricity to the slum dwellers. Definitely the added solar power supply will contribute the national GDP and livelihood improvement of the slum dwellers migrated from the southern part and middle part of Bangladesh where there are a good numbers of river in this part of the country. The climate change causes cyclone, storm, cidor and Ila. The slum dwellers are migrated from those area of Bangladesh to the slums in Dhaka mega city. We consider that, to provide Solar Street LED lighting can improve dramatically change of security concern and livelihood of slum dwellers by quick electrification in Dhaka North and South City Corporation where carbon emissions while using is zero.