Electrical System Guide for DIY Van Conversion

April 12, 2024 by kris de decker Filed Under: DIY, Random, Solar

“The electrical system was without a doubt the most daunting task of our DIY camper van conversion. Our goal was to design and build an off-the-grid electrical system that’s safe, reliable, simple, and intuitive (yet no compromises on functionality). After over 4 years of full-time VanLife, we’re happy to report that our system is working flawlessly, nice!”

“Designing and building an electrical system isn’t really straightforward, there are so many concepts to grasp: solar power, alternator charging, shore power, 12 volts, 120 volts, inverter, battery bank, etc. But with our background as engineers and full-time vanlifers, we’re in a good position to make this intimidating task within your reach and help you put the pieces together with the following guide!”

Read more: Electrical System Guide for DIY Van Conversion.

No Tech Reader #45: Housing

April 7, 2024 by kris de decker Filed Under: Architecture, Building materials, Buildings, DIY, Housing, Human power, No Tech Readers, Video

Structural issues: the cost of material and the value of labour. [The Architectural Review] “In an alternative future, taxes would protect human labour and punish excessive material use to stop wasteful practices.” (Thanks to David Bourgignon.)

How to Build an Iron Age Village. [YouTube] “In Argüeso (Cantabria) a group of young researchers and artisans recreated in 1999 a Cantabrian town from the Iron Age.” (Thanks to Adriana Parra.)

The Masons of Djenne. [YouTube/National Museum of Natural History, Smithsonian Inst.] “The film captures a unique and very old building technique using handmade masonry, perfected through multiple generations in Djenne, a small town in the West African country of Mali.”

Rammed Earth Construction: A Circular Solution For Sustainable Building. [Latin American Structural Engineering and Construction Conference 2024] “The low level of skill required for rammed earth buildings paves the way for self-built activities.”

Pedal-Powered Grain Mill

April 6, 2024 by kris de decker Filed Under: DIY, Human power, Pedal power, Pedal powered machines, Random

[Read more…]

Low Energy Chest Fridge

November 2, 2022 by kris de decker Filed Under: DIY, Random, Refrigeration

“Using vertical doors in refrigeration devices is an act against the Nature of Cold Air. Understanding and cooperating with Nature rather than acting against it leads to much better efficiency. My chest fridge (Vestfrost freezer turned into a fridge) consumes about 0.1 kWh a day. This fridge is 10 to 20 times more energy efficient than typical household fridges on the market today.”

“It works only about 2 minutes per hour. At all other times it is perfectly quiet and consumes no power whatsoever. It is obvious that a truly energy efficient fridge does not cost any more money than a mediocre one. It actually costs less. It also has amazing food-preserving performance because temperature fluctuations in its interior are naturally minimized.”

Image: Dr. Tom J. Chalko.

“Comparing the daily energy consumption of various refrigeration devices available on the market reveals that well-designed chest freezers consume less electricity per day than refrigerators of comparable volume, even though freezers maintain much larger interior-exterior temperature difference (their interiors are much cooler). While chest freezers typically have better thermal insulation and larger evaporators than fridges, there is another important reason for their efficiency.”

“Vertical doors in refrigeration devices are inherently inefficient. As soon as we open a vertical fridge door – the cold air escapes, simply because it is heavier than the warmer air in the room. When we open a chest freezer – the cool air stays inside, just because it’s heavy. Any leak or wear in a vertical door seal (no seal is perfect) causes significant loss of refrigerator efficiency. In contrast, even if we leave the chest freezer door wide open, the heavy cool air will still remain inside.”

“The chest-style refrigerator is surprisingly practical and convenient to use. The most frequently used items are placed in top baskets and are very visible and very easily accessible. Baskets slide on top edges of fridge walls so that quick access to deeper sections of the fridge interior is possible without removing any basket.”

Read more and find the manual at Dr. Tom J. Chalko’s website. Thanks to Pablo M.

How to Build a Persian Windmill

October 22, 2022 by kris de decker Filed Under: DIY, Random, Windmills

“This paper investigated a windmill in Nehbandan which is an example of architectural heritage. Harnessing natural energy and using local materials such as stone, wood and adobe, the residents were able to create environmentally friendly structures. In this paper, one of these windmills that is still standing in Nehbandan was selected from a chain of windmills. Then, based on architectural survey, interviewing with millers and sketching, the dimensions of architectural elements and mechanical components were obtained and the windmill was modelled.”

“The results reveal that there is a close relation between architectural features and mechanical components. The orientation of this windmill toward prevailing wind, the correct placement of walls in three faces and creating a hole named Darvazeh in the third wall to direct the wind into the Parkhaneh are architectural features which provide the kinetic energy of the wind to move the mechanical components. The stepped form of the surrounding walls prevents erosion of mechanical components and as a result increases the durability of the windmill.”

Zarrabi, M., Valibeig, N. 3D modelling of an Asbad (Persian windmill): a link between vernacular architecture and mechanical system with a focus on Nehbandan windmill. Herit Sci 9, 108 (2021). https://doi.org/10.1186/s40494-021-00587-0

https://heritagesciencejournal.springeropen.com/articles/10.1186/s40494-021-00587-0

No Tech Reader #34

October 13, 2022 by kris de decker Filed Under: Consumption, Craftsmanship, DIY, Economy, Education, Farming, Health, Luddites, No Tech Readers, Politics, Social media, Technology, Travel, Unabomber
  • Low-tech at the University. [Kairos] The challenge of low-tech is not to juxtapose harmless « soft » alternatives to industrial technologies, as this would only create a new niche market for « responsible consumers ». It is a question of replacing, as much as possible, the industrial productions by artisanal productions, adapted to the direct environment of their user, selected, understandable, repairable, adaptable and durable.
  • Why the past 10 years of American life have been uniquely stupid. [The Atlantic] “The main problem with social media is not that some people post fake or toxic stuff; it’s that fake and outrage-inducing content can now attain a level of reach and influence that was not possible before 2009.”
  • Stuck Between Climate Doom and Denial. [The New Atlantis] The incredibly fascinating, important, and nuanced issue of climate change has become an online team sport between the good guys (your side) and the bad guys (the other side).
  • The Unabomber and the origins of anti-tech radicalism. [Journal of Political Ideologies]. “As today’s most infamous anti-tech radical, and as the one with the most detailed blueprint for a revolution, Kaczynski may well become the ‘Marx’ of anti-tech.”
  • The Degrowth conundrum. [Resilience] “Only when the right ideas and values become predominant can structural change towards simpler lifestyles and systems take place. These conditions show the fundamental mistake built into the standard socialist assumption that the good society must have highly centralised state control. And it shows that the standard socialist strategy of taking control of the state is also fundamentally mistaken.”
  • Ecological Civilisation: Beyond Consumerism and the Growth Economy – Free Course. “This video series will be grappling with the problems of consumerism and the growth economy; envisioning alternative, post-carbon ways of life; and considering what action can be taken, both personally and politically, to help build an ecological civilisation.”
  • Why we need the apocalypse. [Unherd] In modern terms, “apocalypse” has come to mean “the cataclysmic end of everything”. But this is a long way from the ancient Greek understanding: to uncover, to disclose or lay bare. From this perspective, apocalypse isn’t the end of the world. Or at least, not just the end of the world. Rather, it’s the end of a worldview: discoveries that mean a previous way of looking at things is no longer tenable.
  • Monbiotic Man. [The Land] “Simon Fairlie assesses the farm-free future for humanity spelled out in George Monbiot’s latest book ‘Regenesis’.”
  • Beyond rescue ecomodernism: the case for agrarian localism restated. [Small farm future] “Given the present world historical moment of profound crisis that the modernist myth of progress has generated and cannot tackle, it surprises me how powerfully it still animates almost all mainstream responses to the crisis.”
  • Should we be trying to create a circular urine economy? [Ars technica] “Urine diversion could solve a lot of the environmental problems that plague overwhelmed wastewater treatment systems, but it’s a whole different way of thinking.”
  • How To Deflate An SUV Tyre. [Tyre Extinguishers]. “Because governments and politicians have failed to protect us from this danger, we must protect ourselves.”
  • Useless Car.
  • Silicon Valley’s Push Into Transportation Has Been a Miserable Failure. [Gizmodo] The titans of tech brought plenty of disruption to our broken transportation system but delivered little in the way of innovation.
  • The global warming reduction potential of night trains. [Back on Track] “Back-on-Track, a European network of night train initiatives, has examined air passenger numbers in the EU in 2019 to see which air connections could be replaced by night train connections.”
  • The attack on rail. [Compact Magazine]. “Disorder, war, and general chaos have conspired to prevent what ought to have been the global triumph of the railway.”
  • Chronotrains. This map shows you how far you can travel from each station in Europe in less than 5 hours.
  • Orbis. ORBIS allows us to express Roman communication costs in terms of both time and expense. By simulating movement along the principal routes of the Roman road network, the main navigable rivers, and hundreds of sea routes in the Mediterranean, Black Sea and coastal Atlantic, this interactive model reconstructs the duration and financial cost of travel in antiquity.
  • Fuck Off Google.
  • After self-hosting my email for twenty-three years I have thrown in the towel. The oligopoly has won. [Carlos Fenollosa]
  • FreedomBox. FreedomBox is a private server for non-experts: it lets you install and configure server applications with only a few clicks. It runs on cheap hardware of your choice, uses your internet connection and power, and is under your control.
  • Old age isn’t a modern phenomenon – many people lived long enough to grow old in the olden days, too. [The Conversation] It’s incorrect to view long lives as a remarkable and unique characteristic of the “modern” era.
  • The Healing Power of “Bello”. [Craftsmanship Quarterly] How an intentional community in Italy uses craftsmanship—and a sense of family—to holistically rehabilitate people who are suffering from drug addiction.
  • The making and knowing project. “The Making and Knowing Project is a research and pedagogical initiative in the Center for Science and Society at Columbia University that explores the intersections between artistic making and scientific knowing. Today these realms are regarded as separate, yet in the earliest phases of the Scientific Revolution, nature was investigated primarily by skilled artisans by means of continuous and methodical experimentation in the making of objects – the time when “making” was “knowing.””