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Kris De Decker: “Low Tech: What, Why, and How.”

Kris De Decker: “Low Tech: What, Why, and How.”

The Age of Low Tech by Philippe Bihouix: review by Mark Garavan

The Age of Low Tech by Philippe Bihouix: review by Mark Garavan

For some time now a simple climate change narrative has been foregrounded in the political and media mainstream. This has been particularly evident in the wake of the most recent IPCC Report. In this narrative, climate change is acknowledged but is seen primarily as a problem of excess CO2 in the atmosphere. The key issue is presented as the need to reduce carbon by phasing out the burning of fossil fuels and replacing them with renewable forms of energy. The political fault-line is then drawn around how quickly one does this. Indeed, the substance of much of the various climate conferences has often centred on the question of the speed of this replacement. Conservatives want to move slowly, radicals quickly. In either case though the proposal being pushed forward is that the core challenge is simply to switch our energy source from carbon to various renewables and the issue of climate is solved. The current economic system then carries on and does so even better than before. Better because it is now rendered ‘sustainable’, that is, it can endure ad infinitum.

Philippe Bihouix’s book is a sharp wake-up call that cuts easily through this facile analysis. His book shows in clear terms not only just how simplistic this narrative is but how plain wrong it is. Drawing on straight-forward engineering assessments, he shows how renewable forms of energy cannot in a physical, literal sense replace carbon. The tangible raw materials required to fully replace carbon sources with new energy production methods simply don’t exist. Even the attempt to extract and produce them will precipitate the very climate crisis that the endeavour is seeking to avoid. More generally, new technological solutions, including the proffered ‘green technologies’, inevitably require vast material resources that just are not available…

…click on the above link to read the rest of the article…

Toward an age of low tech for a more resilient and sustainable society

Keeping heat in and near your body in a cool residence

Keeping heat in and near your body in a cool residence

In the first post in this series, I focused on clothing that will help to keep you warm in a minimally-heated residence like ours. We typically heat our home to 60F / 16C from 6 a.m. to 5 p.m., 63F / 17C from 5 p.m. to 10 p.m., and 50F / 10C overnight. The method of clothing I discussed was based on keeping myself acceptably warm under those conditions. Dressing properly has the advantage that it is equally accessible to renters and owners, and it is one of the cheapest solutions to staying warm if you can find well-constructed clothing in your price range.

Clothing isn’t the only way to keep warmth close to your body, however. In this post I’ll discuss some other ways to keep heat inside and near you that don’t involve any structural changes to the building you live in. All of these means with a minor exception will apply to both renters and owners. Some of them are free or nearly so; others can be cheap or expensive.

A much-overlooked way to stay warm is exercise. OK, stop groaning already; I heard you. You’re thinking, not another guilt trip for not exercising. No, not at all. I’m merely pointing out that moving your body around generates heat. Dressing properly or using some of the other strategies I’ll discuss below will help you keep some of that heat close to you after you finish exercising, allowing you to keep your residence cooler for the same comfort level.

When I say exercise, I don’t mean you have to use machines or buy any special clothing to do it. How about doing some housework? Yes, I see you glaring at me. You don’t like housework any better than I do….click on the above link to read the rest of the article…

 

Restoring the Old Way of Warming: Heating People, not Places

Restoring the Old Way of Warming: Heating People, not Places

These days, we provide thermal comfort in winter by heating the entire volume of air in a room or building. In earlier times, our forebear’s concept of heating was more localized: heating people, not places.

They used radiant heat sources that warmed only certain parts of a room, creating micro-climates of comfort. These people countered the large temperature differences with insulating furniture, such as hooded chairs and folding screens, and they made use of additional, personal heating sources that warmed specific body parts.

It would make a lot of sense to restore this old way of warming, especially since modern technology has made it so much more practical, safe and efficient.

 

Most modern heating systems are primarily based on the heating of air. This seems an obvious choice, but there are far worthier alternatives. There are three types of (sensible) heat transfer: convection (the heating of air), conduction (heating through physical contact), and radiation (heating through electromagnetic waves).

The old way of warming was based upon radiation and conduction, which are more energy-efficient than convection. While convection implies the warming of each cubic centimetre of air in a space in order to keep people comfortable, radiation and conduction can directly transfer heat to people, making energy use independent of the size of a room or building.

 

…click on the above link to read the rest of the article…

Olduvai IV: Courage
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Olduvai II: Exodus
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