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The Solar Bottle Bulb

April 6, 2012 in DIY

I have been meaning to write about this project for months now, just got around to it today. Back in September of 2011 I read about Isang Litrong Liwanag (A Liter of Light) project in Manila powered by pop bottles and bleached water! A bottle with water is enough to light up a small room. In the poor neighborhoods of Manila shacks have dark roofs and hardly any daylight. Many of the homes are not connected to the electric grid and in third world countries continuous power availability is not a given.

This year i.e 2012 is the year they plan to complete lighting 1 million homes using this green technology. The clear water disperses the light in all directions through refraction, which can provide a luminosity that is equivalent to a 55-watt electric light bulb, according to the MyShelter Foundation.

The idea behind the Solar Water Bulb is the brainchild of Alfredo Moser a mechanic from Sao Paulo, Brazil; who came up with it during the 2002 power shortage in Brazil to light up his workshop for working during the day! Like Plato said Necessity is indeed the mother of invention!

MIT students have been instrumental in spreading the usage of this simple and virtually free technology to the third world countries as a remedy to light up dark areas during the day without windows! They disperse light to all the corners of the room unlike skylights which are pretty much unidirectional.

How to Make Your Own Solar Bottle Bulb?

Raw materials Needed
1. 1 liter Pet Bottle
2. Galvanized iron corrugated or flat roofing sheet size 9″ x 10″
3. Chlorine (10ml per liter)
4. Steel Brush or Sand Paper
5. Snipping tools to cut the sheet
6. Pliers to fold the sheet back
7. Rubber Sealant or Epoxy resin – to seal and attach the bottle
8. Screws to attach it to the roof securely
9. Filtered water

Directions

On the galvanized roof sheet piece cut a circle 2mm smaller than the diameter of the bottle. Make small cuts perpendicularly along the edge and fold them upwards. Take the bottle and rub the sides to make it rough enough for the glue to adhere. Pass the bottle through the hole and hold in place using the folded edges of the sheet (1/3rd of the bottle above the fold). Apply glue to the bottle and the folded edges to seal and attach them together. Now pour 10ml of Chlorine into the bottle and top it up with filtered water. Close the lid tightly.

Now cut a hole on the roof of the shack where the light is needed. Apply sealant or epoxy resin around the opening to cover an area equivalent to the 10″x9″ sheet. Press it down and secure with screws. The bottle top which will be exposed to the elements needs to be protected (use plastic tubing and sealant to protect it). The Solar Water Bulb is ready and spreading light. The bottle light is believed to have a life of up to 5 years!!

How Does it work?

Simple: water diffracts the light, letting it spread throughout the house instead of focusing on one point. The chlorine keeps the water clear and microbe-free.

Positive Attributes – One can make on ones own Solar Bottle Bulb from waste materials! It can be installed any place world over where there is a roof. It is easily portable and yes, there are a huge number of households world over which do not get enough light during the day.

For e.g 360 million people in India lack access to electricity!!

Negative Attributes – Does not work during night when people do need light. The bottles sticking out of the roof is not very aesthetically pleasing :)

I am amazed at the possibilities such a simple idea provides – It is Green, Eco friendly, Cost effective and Practical! Try it out!

Things to watch out for or remember-

Make sure you seal the roof properly to avoid water damage.

Cover the bottle cap to make sure it does not disintegrate.

It only works during the day when there is sunlight.

Sources:

Isang Litrong Liwanang


Portable Solar Desalination From MIT

October 23, 2010 in Technical News

Clean drinking water is a necessity for human survival. MIT researchers have come up with a mobile solar powered water desalination system which could help remote regions have access to clean water.

The Project

This graphic shows the team’s concept for a portable system that could be shipped to disaster zones.

The team consists of 3 Mechanical Engineering graduate students Amy Bilton (Cyprus Program Fellow), Leah Kelley (Presidential Fellow), Richard Heller MS Student, led by Steven Dubowsky, a professor in both the Department of Mechanical Engineering and the Department of Aeronautics and Astronautics, and Prof. Richard Wiesman.

Funded by MIT’s Center for Clean Water and Clean Energy in collaboration with the King Fahd University of Petroleum and Minerals (KFUPM), the research is aimed at designing small-scale systems for remote regions that don’t have access to vast amounts of electricity. The systems are also designed so that they can be cost-effectively assembled from standard parts and put into operation within hours using local human capital.

The team has built a working prototype that “is capable of producing 80 gallons of water a day in a variety of weather conditions.”

They estimate a larger version that could provide about 1000 gallons of water per day would cost about $8000 to construct. Size wise they believe a C-130 Cargo plane could deliver 2dozen desalination units, thereby providing enough drinking water for 10,000 people.

The supply of energy and clean water to remote locations, such as desert facilities, farming operations, resorts, and small villages in the developing world can be logistically complex and expensive. This project explores the feasibility, design and control of small smart power units to provide clean water and energy to remote sites by using solar power and reverse osmosis modules.

Watch the video about the product -

Opinion

When disasters strike basic necessities like drinking water made available sooner makes recovery faster and manageable. For remote locations too this might be a viable alternative as a fresh water source provided the solar panels becomes viable cost wise.

Read the full article HERE

For more details on the Project check their Website


Solar Makes It’s Way Back to The White House!

October 6, 2010 in Environmental News

By Spring of 2011 The White House will have Solar Panels heating water, keeping up with the president’s executive order that called on the federal government buildings to lead in the establishment of a clean energy economy.

It was just 4 weeks back that 350.org’s Bill Mckibben and a team of students from the Unity College Maine made a trip to the White house to put Solar back on the White House roofs where Jimmy Carter put it in 1979! They were also carrying one of the solar panels which was installed on the White House roof with them.We covered it here

Today Energy Secretary Steven Chu announced that Solar panels and a solar hot water heater will soon be installed at the White House, at the 2010 GreenGov Symposium in Washington, accompanied by Nancy Sutley, chairwoman of the Council of Environmental Quality.

What better way to put alternative energy on the front page  and highlight our need to let go of fossil fuel as a source of energy than putting the most powerful home in the world go Solar! Live Green!

Source -

Article on CNN – Solar Power Coming to the White House

350.org and their road trip to the White house in early September of 2010 – Big Victory White House Goes Solar!


Boeing’s Solar Eagle

September 30, 2010 in Solar energy

The US defense department wants a drone which would stay aloft for five years and Boeing has stepped up to the plate. Boeing is building a prototype of a solar-electric drone called the Solar Eagle which they plan to test in 2013. The plane could be a pseudo-satellite for communication, reconnaissance and earth-monitoring.

Artists representation of the Solar Eagle Courtesy Discovery.com

DARPA, the Defense Advanced Research Projects Agency, is paying The Boeing Co., $89 million to build a huge, solar-powered, robotic aircraft that can carry 1,000 pounds of sensors and other payloads for five years at a stretch.

The plane Solar Eagle, would need to be virtually maintenance-free and highly energy efficient. Well over half the plane, which spans 400 feet from wing to wing, will be covered with solar arrays to harvest energy from the sun. The power needs to be stored onboard so the plane can fly by night, as well as power payloads.

The Defense department wants the plane to be as dependent as a satellite with the added benefit of being able to be brought back and put back up as and when needed. It would be flying above 65,000 feet- twice the altitude of a commercial flight!

In July of 2010 The Zephyr – broke the official world record time for the longest duration unmanned flight. Zephyr was launched at 06:41 (MST) on 09 July 2010 and stayed aloft for 14 nights (336 hrs / 22 minutes) above the US Army’s Yuma Proving Ground in Arizona, before being brought safely back to earth on the morning of 23 July having achieving all the objectives of the trial. The Zephyr was built by Qinetiq, Boeing’s partner in the Solar Eagle project.

The Solar Eagle is being designed at the Phantom Works, Boeings main Research and Development arm.

You can watch the Zephyr – take off, flight and landing in the video below.

Discovery.com

Qinetiq website

Article About Zephyr’s first long flight

Boeing.com


Stanford’s Thinner Than The Wavelength of Sound Solar Cells

September 29, 2010 in Solar energy

One thing we know about solar cells is that thinner it is less expensive it gets; thin film solar is cheaper than the standard silicon cells. Stanford University’s team of Researchers has come up with Solar cells thinner than the wavelengths of light which are also more efficient! They say Ultra-thin solar cells can absorb sunlight more efficiently than the thicker, more expensive-to-make silicon cells used today, because light behaves differently at scales around a nanometer (a billionth of a meter).

The team consists of Shanhui Fan, associate professor of Electrical engineering and postdoctoral researcher Zongfu Yu who is the lead on the PNAS paper. Aaswath Raman, a graduate student in applied physics, also worked on the research and is a coauthor of the paper.

Everyone worked with the assumption that light travels in a straight line i.e. if a ray of light hits a mirror it bounces back as another ray. When Yu began investigating the behavior of light inside a material of deep subwavelength-scale – substantially smaller than the wavelength of the light – that it became evident to him that light could be confined for a longer time, increasing energy absorption beyond the conventional limit at the macroscale. On further research Yu figured out that he could increase absorption rate by 12% by sandwiching the organic thin film between two layers of material – called “cladding” layers – that acted as confining layers once the light passed through the upper one into the thin film. Atop the upper cladding layer, he placed a patterned rough-surfaced layer designed to send the incoming light off in different directions as it entered the thin film.

The project was supported by funding from the King Abdullah University of Science and Technology, which supports the Center for Advanced Molecular Photovoltaics at Stanford, and by the U.S. Department of Energy.

Source – The Stanford News


A DIY Solar Water Heater From Plastic Bottles

September 9, 2010 in DIY

Solar water heaters are probably the most widely used solar product worldwide, especially in Asia and other parts of the developing world it is a constant with any new construction. Out of Brazil comes this plastic water bottle based water heater created by Jose Alano a retired mechanic. He created a simple, cheap, energy saving rooftop solar water heater which is benefiting thousands of people across Brazil. Alano refused to throw away plastic bottles and packaging to end up in the landfills. In his words “Being 59 years old, I have had the opportunity to witness the technological advances of science, which improved food storage. But nowadays, some packaging weighs almost the same than the food itself! Years ago, my wife and I realized that we were not prepared for this new form of consumption.

Using his basic knowledge of Solar water heaters he and his wife created the green alternative version making use of 100 plastic (PET) bottles and 100 Milk Cartons there by getting rid of their waste responsibly.

Alano’s water heater won the Superecologia prize, offered by the Superinteressante magazine for renewable projects in the not-for-profit sector. He has made his design patented and available to use as a not for profit design. The only restrictions are on industrial production and politicians claiming credit for it!

The Invention

The standard solar water heaters cost a couple of 1000$ and have copper as a main element. The Plastic Bottle solar water heater is based on the thermosyphon technology which is used in many solar water heaters. It makes use of the circulation of water based on density; hot water which is less dense moves upwards while the cold water which is denser moves down. Alano estimates that to heat water for a shower of one person, a 1m² panel would be enough.

Materials needed for construction:

The only material required to build a recycled water heater are:

  • 2L plastic bottles (60),
  • Cartons (50)
  • 100mm PVC pipe (70 cm)
  • 20mm PVC pipe (11.7m)
  • 90-degree 20 mm PVC elbows (4)
  • 20mm PVC T-connectors (20)
  • 20 mm PVC end caps (2)
  • PVC glue
  • Black matt paint
  • Paint Roller
  • Sand paper
  • Self-amalgamating tape
  • Tools – Rubber hammer, saw, wood or other material for the support.

Once you get everything ready check out the diagrams in this DIY Leaflet online (PDF format in Portuguese, but the diagrams are easy to follow). use the 100mm PVC pipe as a mold and cut off the bottom of the bottles. Cut the 20mm PVC pipes into 10 x 1m and 20 x 8.5 cm pieces, and assemble with the T-connectors. Cut and paint the cartons (page10-12), as well as the one-meter long pipes. Assemble according to figure B.

The panels must be placed at least 30 cm below the tank and be sited on a south facing wall or roof. To optimize heat absorption, the panels must be mounted at the angle of your latitude, plus 10°. In London, for instance, the panel’s inclination should be 61°. Alano recommends that the plastic bottles in the panels should be swapped for new ones every 5 years: ‘Over time, the plastic becomes opaque, which reduces the heat caption, while the black cartons can be repainted.’ So once the bottles become opaque it is time to replace the bottles and send the used ones to the recycle dump.

Check out a video of a Alano’s bottle solar heaters below:

Such a useful way to utilize plastic bottles: green, clean and energy efficient! Reduce Reuse Recycle the 3 R’s at work! Live Green!

Source for data and Pictures – The Ecologist


Heritage Solar Slate Roofing: Green And Visually Pleasing

September 8, 2010 in Green Products

Read about this new solar roofing tile from Heritage solar called “Solar Slate” which truly makes use of your roof space without taking away from the aesthetic appeal of your home. The slates are designed to not stand out, there by helping with planning permission and regulations. It can even be used in historic preservation areas. Solar slate is manufactured by Renewable Energy Systems Ltd: a UK based leading company in the field of alternative energy projects.

Snowdonia national Park in the UK has a traditional cottage called Y Stabal which has 340 panels of the solar slate installed in its roof.

Heritage Solar Slates are innovative roof-integrated photovoltaic solar slates.
They are efficient, reliable, fully weather proof and look just like regular roofing slates. Unlike traditional solar panels, they blend in with standard roof slates to create a virtually invisible solar panel roof. Heritage Solar Slates are ideal for use in conservation areas, on historic buildings, new builds, or renovation projects. They are very low maintenance and easy to install.

What makes Heritage Solar Slates better than competition:

  • Reliability: No moving parts
  • Aesthetics: At last a perfect match to traditional slates
  • Practically no maintenance
  • Feed-in-tariffs eligible
  • Easily meets planning requirements
  • Plug and play: painless installation

The company site has the Guarantee terms as follows: Guarantee terms include a 10 year roof integrity guarantee and 10 year minimum performance guarantee (subject to terms, conditions, and limitations).

Clean, reliable, sustainable, renewable and aesthetically appealing! Check it out when you think about a new roof.

Source –

Pictures and Data – Heritage Solar slate Website

World Architectural News Article – The Solar Slate is a challenger for the 2010 WAN Awards

Inhabitat article


SoladeyJ3X: The Solar Toothbrush

September 1, 2010 in Green Products

The future of Oral hygiene could be Solar! Imagine not having to squeeze out the last bit of toothpaste from the tube! Worrying about your spouse not closing it properly… Not having to write a note to pick up the right brand (with the wide variety out there finding the right paste is almost an adventure in itself J University of Saskatchewan Dentistry professor Emeritus Dr. Kunio Kumiyama and his colleague Dr. Gerry Uswak were recruiting 120 teens willing to try out the solar powered toothbrush Soladey-J3X in 2007. The Japanese manufacturer The Shiken Company is paying the researchers to investigate whether the brush, which causes a chemical reaction in the mouth works better on plaque than a conventional brush and toothpaste combo.

Dr. Kumiyama described his first prototype 15 years back in the Journal of Clinical Periodontology. It contained a titanium dioxide rod in the head of the brush just beneath the nylon bristles. When light shined on the wet rod it would release electrons which reacted with the acid in the mouth which helped breakdown the plaque without using toothpaste.

Now the latest edition the Soladey-J3X according to Dr. Kumiyama packs double the chemical punch when compared to the earlier version. Protruding from the base of the brush is a solar panel, which transmits electrons to the top of the toothbrush through a lead wire. For the brush to work one needs ambient light, i.e. light enough for a solar powered calculator to work.

How Does it Work?

The brush holder head lasts for a long time, while the head will need replacement when the bristles fray. The brush heads are priced at around 250 yen (3$) in Japan.

Last month, the researchers presented their research at the FDI Annual World Dental Conference in Dubai, where their poster won first prize out of 170 entries.

Check out the video about the toothbrush:

I am waiting for it to make its appearance in our local stores, would definitely check it out. It has been launched in Canada as Soladey Eco and can be found here

Check out the Company Website HERE

Source – Read the entire article HERE


Ivanpah Solar Project In California

August 23, 2010 in Solar energy

There are many new Alternative energy projects coming up all over the US, and the US still has a lot of catching up to do when it comes to alternative energy when compared to the developing economies China and India. China is the leader in investment in alternative energy programs world over.

Under the EERE’s solar Energy technologies program many new alternative energy programs are developing. On August 12th the California Public Utilities Commission (CPUC) approved a power purchase agreement for the utility-scale Ivanpah Solar Electric Generating System. CPUC granted a 20-year contract between Southern California Edison Company and Ivanpah operator BrightSource Energy, Inc. for 117 megawatts (MW) of planned production from the three-tower, concentrating solar power (CSP) complex in the Mojave Desert of southeastern California. The contract calls for electricity to begin flowing on September 30, 2013. The site’s three plants will feature the company’s proprietary solar power tower technology, which employs thousands of flat mirrors to concentrate the sunlight on a central tower-mounted receiver. Water pumped to the receiver is boiled into steam, which drives a turbine to produce electricity. Solar power towers allow the capture of a greater percentage of solar energy than do other solar thermal technologies. Ultimately, the project is designed to generate approximately 400 MW of electricity, an output that would nearly double the existing generation capacity of CSP facilities in the United States.

The project will be sited on about 4,000 acres of public land proposed public land in San Bernardino County.

Project Overview
  • An approximately 400 megawatt solar complex using mirrors to focus the power of the sun on solar receivers atop power towers.
  • The complex is comprised of three separate plants to be built in phases between 2010 and 2013, and will use BrightSource Energy’s Luz Power Tower (LPT) technology.
  • The electricity generated by all three plants is enough to serve more than 140,000 homes in California during the peak hours of the day.
  • Located approximately 4.5 miles southwest of Primm, Nevada, in the desert on federal land managed by the Bureau of Land Management.
  • When constructed, Ivanpah will be the first large-scale solar thermal project built in California in nearly two decades and the largest in the world.
  • The Ivanpah Solar Electric Generating System will nearly double the amount of commercial solar thermal electricity produced in the US today.
Environmental Benefits
  • Avoids 400,000 tons of CO2 emissions per year; the equivalent of removing 70,000 cars off the road annually.
  • Employs a closed-loop dry-cooling technology, which reduces water use by 90 percent. Will use 100 acre feet per year, the equivalent of 300 homes’ annual water usage; and nearly 25 times less water than competing technologies.
  • Cuts major air pollutants by 85% compared to new natural gas-fired power plants.
  • Technology places individual mirrors onto metal poles that are driven into the ground, reducing the need for extensive land grading and using far fewer concrete pads than other technologies.
Economic Benefits
  • Construction Jobs                                 : 1,000 jobs at peak of construction; average 650 jobs annually over 3 year period
  • Operations and Maintenance Jobs : 86
  • State and Local Tax Benefits             : $400 million*
  • Total construction wages                   : $250 million
  • Total Employee Earnings                   : $650 million
    *Based on 30 year plant life cycle

Read the entire article here

Check out Brightsource Energy website


Solar Energy Now a Viable Large Scale Energy Source?

July 31, 2010 in Solar energy

When I read “Solar Power is Cheaper than Nuclear Power” I seriously thought someone was trying to pull a quick one by talking about 20 years into the future as if it was happening in the present. Then I read the article on The Green Energy Collective Website in detail and was thrilled by the realization that 2 researchers at Duke University have come to the conclusion that Solar Energy may have reached grid parity!

It’s no secret that the cost of photovoltaic cells (PV) have been dropping for years. A PV system today costs just 50 percent of what it did in 1998. Breakthroughs in technology and manufacturing combined with an increase in demand and production have caused the price of solar power to decline steadily. Nuclear Power plants are being pushed as the only viable alternative economically right now. But now the Duke researchers are saying that Solar power has attained price parity in regards to Nuclear power.

The Study authors John Blackburn and Sam Cunningham say “Electricity from new solar installations is now cheaper than electricity from proposed new nuclear plants.” They have their study based in North Carolina.

According to Osha Davidson of Energy Collective, if the data analysis is correct, the pricing would represent the “Historic Crossover” claimed in the study’s title.

Two factors not stressed in the study bolster the case for solar even more:

1) North Carolina is not a “sun-rich” state. The savings are likely to be even greater for states with more sunshine –Arizona, southern California, Colorado, New Mexico, west Texas, Nevada and Utah.

2) The data include only PV-generated electricity, without factoring in what is likely the most encouraging development in solar technology: concentrating solar power (CSP).

Power costs are generally measured in cents per kilowatt hour – the cost of the electricity needed to illuminate a 1,000 watt light bulb (for example) for one hour. When the cost of a kilowatt hour (kWh) of solar power fell to 16 cents earlier this year, it “crossed over” the trend-line associated with nuclear power.

Courtesy Wikimedia Commons

Currently US energy supply depends 70% on Fossil Fuels (including Coal) and 20% on Nuclear Energy. The researchers say that mass produced Solar energy is being offered to customers at 14cents per kilo Watt Hour, which would make Solar energy one of the least expensive energy sources in America.

As I looked it up for more details I came across articles in NYTimes and a discussion on Slashdot both make some very interesting reading.

If what the researchers say hold true, we should have greener energy powering our day to day activities within a decades time. Sounds good will have to wait and see how it pans out. Live Green!

Some interesting facts:

  • From 1943 to 1999 the U.S. government paid nearly $151 billion, in 1999 dollars, in subsidies for wind, solar and nuclear power, Marshall Goldberg of the Renewable Energy Policy Project, a research organization in Washington, wrote in a July 2000 report. Of this total, 96.3 percent went to nuclear power, the report said.
  • According to credit rating agency Moody’s Nuclear installations invariably lower the credit rating of the company. “Of the 19 applications at the N.R.C.(US Nuclear Regulatory Commission) , 90 percent have had some type of delay or cancellation, run into a design problem, suffered cost increases and/or had the utility bond rating downgraded by Wall Street.”
  • Nuclear subsidies in the Senate proposal include five-year accelerated depreciation; tax credits for investments and production and eligibility for the advanced energy tax credit; an increase in government insurance against regulatory delays; access to private activity bonds; and a $36 billion increase in loan guarantees, bringing the total to $56 billion. (The Nuclear Energy Institutes Goal was a $100 Billion!)

Source of the article here

Another article here

Duke University Website

The Study Published by the researchers in full can be read here