AfriGadget

Photo courtesy of Bergey. Oct 26 2006 Dedication of the cell phone base station site in Laisamis, Kenya Africa.

AfriGadget appears to be on a roll with wind power, so lets continue the wave shall we?

The company WinAfrique designs and builds hybrid wind and diesel turbine systems for powering cell phone base stations. Kenya’s biggest wireless companies Safaricom and Celtel have contracted with WinAfrique.

…Safaricom contracted with Winafrique Technologies in Nairobi to design and supply pilot wind/diesel hybrid systems at three very remote base stations. The systems consisted of a Bergey 7.5 kW turbine on a 24 m (80 ft) SSV tower, sealed batteries, and an inverter. These sites were installed and monitored for one year. The results showed excellent reliability and diesel fuel savings of 70-95%. Based on these positive results, Safaricom has contracted for six more sites, and has many other wind/diesel sites in the planning stage.

Hybrid systems that utilize renewable energy such as wind and solar are making it possible to extend wireless service in remote areas that are not connected to grid power. You can read more about Safaricom’s use of wind powered cell phone base stations, and more here about Celtel’s.

William’s Windmill, originally uploaded by whiteafrican.

Inspiring, innovative and representative of what Africa’s future holds.

William Kamkwamba is a 19 year old Malawian who built his first windmill at 14. Here he is, pictured just this last week doing some work on his windmill near his home.

The propellers are made of plastic pipes supported by sticks to that they should not bend when the wind is strong and placed almost vertical to the direction the winds is coming.

Unlike in most windmills where the propellers directly turn the spindle connected to the turbines directly, William added pulleys to his machine to increase speed thereby generating more energy.

There are three pulleys and the last is connected to a bicycle wheel. When this wheel turns it turns a dynamo which in turn generates electricity.

Read his blog for inspiring stories about making things work in rural Africa!

Read more on William’s Windmill blog in Malawi.

Being on the ground in Nairobi makes it a little easier to find good AfriGadget stories. I took a walk down Ngong road, an area with a lot of shadetree mechanics, wood carvers and metal fabricators. The first place I stopped at had a home made welding machine.

Simon, the shop owner, showed me a couple of the machines and gave a video tour of how it works. He’s a prime example how an entrepreneur in Africa will figure out ingenious solutions to meet local market demands. The welders sell for around 14,000 Kenya Shillings (just over $200), but fabrication costs only a small fraction of that.

Below is the video and some pictures. (Another video will be uploaded later, connection speed issues preclude me uploading another one right now).

Send in your stories of African ingenuity here.

The Malindi Handicraft Association (MHA) is one of Kenya’s largest wood handicraft coops in Kenya. They are currently striving to meet fair trade certifications. Part of that certification involves utilizing sustainable woods such as Neem wood. One of the downsides to utilizing Neem is that if it is not dried properly it can cause the carvings to crack. To combat this problem they are utilizing a solar Kiln. Dark sheets located on the roof of the kiln trap solar energy heating up the inside of the Kiln. The Kiln has been outfitted with electric fans so that during the rainy seasons the carvers can still dry their carvings.

An all-in-one cooker, energy generator and fridge could soon be improving quality of life in developing countries, thanks to an international project launched this week.

According to a press release by Paul Riley, SCORE Project Director, the £2m Stove for Cooking, Refrigeration and Electricity (SCORE) project aims to work with rural communities in Africa and Asia, where access to power is limited, to develop a versatile domestic appliance powered by biomass that will significantly improve health and welfare.

The SCORE device, which is still in the concept stage and is shown in the picture below, will work through the conversion of biomass to sound energy for heating and cooling.

This technology is far more efficient and less polluting than burning wood in an open fire, currently the primary cooking method of two billion people around the world. Dr Pullen(Research team leader) adds:
“Using this technology while ensuring that the device is relatively low-cost and can be produced using local materials and labour is one of the great challenges of this project. Thermoacoustic systems have always been expensive and high-tech - a great deal of the first stage of this project will be taken up with translating the technology into something that can easily be mass produced.”

The SCORE project website can be found here

( via Timbuktu Chronicles )

A small company in Madagascar is working to get electricity to rural areas of the island. This video shows them taking the solar panels around in a van to show people how it works and educate the children on solar power. It’s an interesting video, especially near the end where Bill hooks up his computer to the internet through a satellite connection at night - all powered by the solar panel’s stored energy.

Marlies sends us a bunch of pictures and an interesting story on how bio gas toilets in Kibera slum in Nairobi, Kenya are being used:

Just the other day on a visit to Kibera Slum I came across this interesting bio gas latrine which is being set up for Kibera people as a response to lacking community toilets. The sanitation situation in Kibera is really really poor! There are a couple of community toilets which where set up after the shooting of the Constant Gardener but only a few years later these are in bad shape! Again, they cost 3/= per visit which is really above of what a typical Kibera inhabitant can afford. Just sum up what it will cost for 5 visits per day for a family of five! So the bio gas latrine is a really good option, since it will generate a little income to make the toilets free of charge.

Here are some pictures:

IslamOnline.net has a great writeup on how these work.

[NOTE: If you have any images, stories or reports you'd like others to know about, you can contact us through the AfriGadget contact form. - Thanks Marlies!]

New images! (July 17, 2007). Thanks to Christian Rieck and Marlies:

Filed in:
Energy, Ingenuity |
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Rural Bio Gas Generator in Kenya

Posted: February 19th, 2007 By: Erik Hersman

Mark Steudal, a Peace Corps volunteer in Kenya, sends us this:

This is a picture of a Bio Gas generator. It is basically a 9 foot deep well that is filled with manure and water from the nearby cows. A huge drum is then placed into the well. The drum catches the methane gases that are generated from the manure decomposing, which due to the pressure of the large drum are pumped into the house by a underground hose. This family did most of their cooking on the gas, didn’t need to use firewood or buy charcoal (except when making chapatis of course).

[NOTE: If you have any images, stories or reports you'd like others to know about, you can contact us through the AfriGadget contact form. - Thanks Mark!]

Filed in:
Energy, Food |
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Homemade Windmill in Malawi

Posted: December 18th, 2006 By: Erik Hersman

A young man has created a windmill out of spare parts in Malawi.

William Kamkwamba says one day while reading he came across two books, Using Energy and How it Works, which are about generation of electricity using a windmill.

On a trial and error basis, he managed to make a small windmill which generated electricity enough to light his dorm. Seeing its success he planned for a bigger one so that his parents could benefit and some well-wishers gave him money to get some of the materials he needed.

In total, he spent a total of 2200 Malawi Kwachas, which is equivalent to $16. William is saving his family money on home lighting expenses, recharges people’s mobile phones and radio batteries, and also charges his own automobile battery for backup power.

Unlike most windmills, where the propellers turn the spindle connected to the turbines directly, William added pulleys to his machine to increase speed thereby generating more energy.

There are three pulleys and the last is connected to a bicycle wheel. When this wheel turns, it spins a dynamo which in turn generates electricity.

Story Link (via Hacktivate)

Filed in:
Energy, Gadgets, Ingenuity, Materials |
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Harnessing Water Power in Zimbabwe (video)

Posted: June 1st, 2006 By: Erik Hersman

Intermediate Technology Development Group (ITDG) worked with a rural community in Zimbabwe to solve its water problems. Watch the video and see how they used micro hydro setup on a small stream to create electricity and harness water for both drinking and crop irrigation.

Filed in:
Energy, Gadgets, Water |
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