A Trunk on Wheels

September 29, 2015 by kris de decker Filed Under: Cargo, Low-tech cars, Random

tripl elektric motor bike

Denmark’s Tripl electric motorbike has more cargo space than a Mercedes E-Class estate. The vehicle is aimed at goods delivery in large cities. Heated and refrigerated cargo boxes are available. Some specifications:

  • Cargo volume: 750 litres
  • Load capacity: 200 kg
  • Electric motor: 4 kW
  • Top speed: 45 km/h (28 mph)
  • Battery: 5.3 kWh / 6.7 kWh / 8 kWh
  • Charging time: 5.3 – 8 hours
  • Range: 70-100 km (with 8 kWh battery), 50-80 km (6.7 kWh battery), 30-60 km (5.3 kWh battery)
  • Weight excl. battery: 221 kg
  • Weight with 8 kWh battery: 301 kg
  • Length: 241 cm
  • Width: 127 cm
  • Height: 1170 cm
  • Wheelbase: 150 cm
  • Turning diameter: 7.5 m

Technology Ages in Reverse

September 28, 2015 by kris de decker Filed Under: Random, Technology
sol-char

A complex biochar-making toilet. “It will never be deployed anywhere”.

Our society is pathologically enthralled with the new. As scientists and engineers in global development, we’re inculcated starting from very early in our training to seek “the cutting edge” of technological innovation. But if we want the best chance of making a positive difference on the future, that’s the opposite of what we should do.

The reason is that technology ages in reverse. Or put another way, the longer a given technology has been around, the more likely it is to persist into the future. So, if you want your efforts in science to matter in the future, you’d better look to the past to define relevant research questions.

According to philosopher and risk analyst Nassim Taleb, author of Antifragile: Things That Gain from Disorder, while perishable items (such as humans, cats and tomatoes) experience a decline in life expectancy with each passing day, nonperishable things (such as art, literature, ideas and technologies) can experience increased life expectancy the longer they are in circulation. This is known as the Lindy Effect… Taleb asserts that our modern culture trains us to think that the new is always about to overcome the old. But this is just an optical illusion because the failure rate of the new is so much higher than that of the old.

Quoted from: Forget the cutting edge embrace the old tech future, Engineering4Change.

Gravity-Powered Solar Tracker

September 23, 2015 by kris de decker Filed Under: DIY, Gravity Powered Machines, Random, Solar

gravity powered solar tracker

The SunSaluter is an ultra low-cost, passive, single-axis solar panel rotator (called a tracker) designed for the developing world. Using only the power of gravity and water, the SunSaluter enables a solar panel to follow the sun throughout the day, boosting efficiency by 30% and producing four liters of clean drinking water.

It is 30 times less expensive than conventional motorized solar panel rotators (which use complex electronics), much more reliable, and consumes no electricity itself. With improved efficiency, fewer solar panels are needed, and the overall cost per watt of solar energy is reduced.

The SunSaluter features an adjustable design which allows it to integrate with any solar panel – no special tools needed. The solar panels are mounted on the rotating frame, a weight is suspended from one end, and a special waterclock is suspended from the other. As the water empties and the container gets lighter, the panel slowly rotates. The user can set the rate at which the waterclock empties, which controls the SunSaluter’s rate of rotation.

The SunSaluter also contains a water purifier so that each day it produces four liters of clean drinking water. By combining energy and water collection into one simple device, the SunSaluter improves consistent usage of the purifier, which is the Achilles heel of clean water programs. SunSaluters are available for purchase anywhere in the world as a DIY-kit, or in India as prefabricated systems.

More information: SunSaluter. Via Makeshift, who made a video about the technology.

African Vernacular Architecture Database

September 6, 2015 by kris de decker Filed Under: Africa, Architecture, Buildings, Random

Malawi home built with rammed earth and thatch roof in Chizogwe village. Picture: Jon (Twingi) Sojkowski

I am a registered architect and I have a passion for African vernacular architecture. I recently (Sept. 2014) traveled to Malawi to document the vernacular architecture in the entire country. 4,700 pictures are on the web page.http://www.malawiarchitecture.com/

I also wanted to share with you my latest project… a data base on African vernacular architecture. This project was started because of the lack of information available on line. The data base includes images from every African country. Here is the link to the site:

http://www.africavernaculararchitecture.com/

The goal of the project is to have people, who live or work in an Africa country, submit pictures of vernacular structures to the data base to share with the world. Full credit is given for every picture submitted. For too long, African vernacular architecture has been a topic that has been both under-documented and, unfortunately, ignored. People say there needs to be documentation but yet nothing is done. Whether this is due to difficulties in obtaining funding or just apathy, the fact remains that very little data can be found online.

malawi house with porch

House with porch in Malawi. Picture: Jon (Twingi) Sojkowski

Architecture is as much of a part of a countries culture as is language, music or art. African vernacular architecture is disappearing. I witnessed that fact in Malawi. There are many reasons why vernacular materials and construction techniques are being abandoned in favor of western ones. One main reason is the lack of documentation, especially finding information on line.

I am hoping you could share the project with your readers, the more awareness, the better the chance to convince people to submit pictures to the data base. There is no other resource for African vernacular architecture like the data base: there is no organization gathering information, there is no active research, there is no voice for it. I will gladly answer any questions that you might have about the project.

Cheers,

Jon (Twingi) Sojkowski

Why Trains Are the Best Aid to Thought

August 20, 2015 by kris de decker Filed Under: Brains, Random, Trains, Travel

edward hopper train dreaming

“Journeys are the midwives of thought. Few places are more conducive to internal conversations than a moving plane, ship or train. There is an almost quaint correlation between what is in front of our eyes and the thoughts that we are able to have in our heads: large thoughts at times requiring large views, new thoughts new places. Introspective reflections which are liable to stall are helped along by the flow of the landscape…

Of all modes of transport, the train is perhaps the best aid to thought: the views have none of the potential monotony of those on a ship or plane, they move fast enough for us not to get exasperated but slowly enough to allow us to identify objects…

Every time the mind goes blank, having hit on a difficult idea, the flow of consciousness is assisted by the possibility of looking out of the window, locking onto an object and following it for a few seconds, until a new coil of thought is ready to form and can unravel without pressure.

At the end of hours of train-dreaming, we may feel we have returned to ourselves — that is, brought back into contact with emotions and ideas of importance to us. It is not necessarily at home that we encounter our true selves. The furniture insists that we cannot change because it does not; the domestic setting keeps us tethered to the person we are in ordinary life, but who may not be who we essentially are.”

Quoted from: The Art of Travel, Alain de Botton, 2003. Picture: Compartment C, Car 293, Edward Hopper.

Recharging Groundwater with Water-Harvesting Ditches

August 6, 2015 by kris de decker Filed Under: Irrigation, Random, Water, Water management

swales in colorado

“Simply put, swales are water-harvesting ditches, built on the contour of a landscape. Most ditches are designed to move water away from an area, so the bottom of the ditch is built on a modest slope, usually between 200:1 to 400:1. Swales, however, are flat on the bottom because they’re designed to do the opposite; they slow water down to a standstill, eliminate erosion, infiltrate the surrounding area with water, and recharge the groundwater table. When water moves along the flat bottom of a swale, it fills it up like a bathtub — that is, all parts of the bath tub fill at the same rate. The water in a swale is therefore passive; it doesn’t flow the way it would on a slope.” [Read more…]