Wind Catching ~ The Ancient Art And Science Of Persian Air Conditioning

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Wind towers – aren’t they  just beautiful? Not only that, they provide low-tech, totally renewable energy solutions to day-time desert heat waves. Within the capped tower is a port that is opened towards the prevailing wind. Some towers are multi-directional, the vents opened and closed as appropriate. Air is drawn into the living quarters below, its movement providing the cooling effect.

When there is no wind, the tower acts as a chimney, venting hot air from the interior. A more sophisticated version involves an underground canal, qanat, in which case the wind tower vent is opened away from the prevailing wind, and the system pulls cooling air up from the canal. You can read more about this if you follow the link.

But it seems to me to be an example of perfect human ingenuity – problem solving with minimal impact on the natural environment, while at the same time harnessing natural resources without depleting them. Persian architect-engineers came up with such elegant and aesthetically pleasing solutions over 2 millennia ago, although Ancient Egyptians apparently had something similar.

And not only can you have upmarket palace installations, but there is also the demountable, flat-pack desert nomad version.

The first kind was photographed (above and below) in Dubai at the restored Sheik Saeed Al Maktoum House on Dubai Creek. It is now a museum, but built in 1894, it was originally the home of the ruling Al Maktoum family. Persian architectural techniques arrived in Dubai in the nineteenth century along with the development of the pearl fishing industry there.

The portable Bedouin version I spotted in the Dubai Museum  in the courtyard of the old fort. Apparently the disadvantage of this kind of makeshift structure was that close proximity to the cooking hearth could have the unintended consequence of turning it into an actual chimney, and thus a major fire hazard.

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 copyright 2015 Tish Farrell

For more wind themed posts please visit Ailsa’s blog at Where’s My Backpack

ILLUMINATING INGENUITY AFRICA-STYLE

“production from local resources for local needs is the most rational way of economic life.”    E F Schumacher

                                                                                                                                                             

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You could call this the mother of all light bulb moments: a piece of African technology transfer that would have been right up E.F. Schumacher’s street (Small is beautiful: a study of economics as if people mattered). Of course light bulbs aren’t much use to people whose politicians have failed to connect their villages to the national grid.  One might also assume that a blown light bulb isn’t of use to anyone anywhere. But well,  think again. Here we have the proof of it: some very natty Tanzanian recycling. And in case it is not entirely obvious from this photo, here we have a used light bulb, and a remodelled tin can made into a very handy carrying lamp. The cap that holds the wick in place, can be removed to refill the bulb with oil as needed.

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And talking of E F Schumacher, his book Small is beautiful  has been rated one of the 100 most influential books written since World War 2. It has inspired highly inventive  Intermediate Technology Development projects around the world, low tech solutions that use the kinds of materials and spare parts that can be maintained, replaced  and replicated locally. Adeyemi’s floating school in Lagos (see earlier post Floating not flooding) is a good example of such principles in action.

This particular light bulb lamp was bought in the market in Tabora in central Tanzania. Graham lived there two years in a house beside the old Arab slave route, while working as an agricultural extension officer for V.S.O  (Voluntary Service Overseas). These were in the days TBT – Time Before Tish. 

But then much later there was another light bulb moment. When we were in Kenya doing fieldwork on the Central Province farms ( Looking for smut: work on Kenya’s highland farms ) I came across quite another use for a cast off bulbs. We had been invited into a Kikuyu farmer’s home for tea and cake, and there it was hanging on the sitting room wall. Our hosts had already told us the sad tale of how they and their neighbours had made financial contributions to  a political candidate who promised to bring electricity to their community, but then conveniently ‘forgot’ once he had been elected. I wrote a poem about it.

 

Power-play

Joe Maina, small-time farmer, says

before the polls he paid

some local boss three thousand bob

to bring the power lines down the Rift.

The big man won the vote,

but now, as ever,

Faith Waithera Maina cooks githeri,

bending at her hearth,

three rocks to hold the pot,

sleek skin cured hide in smoke-house fug.

Next, slogs like an ox on cow-track paths

to fetch more wood  to feed the fire.

“Our days’ career,” she shrugs.

Till dusk she lights her

sofa room with fumy lamps,

where, hanging on the wall with

keep-safe snaps and family memorabilia,

a cast-off city sixty-watt has second lease;

recharged of course,

a perfect vase

for garden sprays of purple

Tradescantia.

 

 

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