Prices and margins of petroleum products in France and in the European Union Keywords: cost, petroleum, brent, fuel, diesel, unleaded, gasoline, money, cost, evolution, history, France, Europe Government document of 10 October 2005 presenting the cost and the margins realized on the various petroleum products. Download the file (a subscription to the Newsletter […]
Month: September 2007
Download: Understanding the global crisis 1929 and its consequences, as well as the current economic crisis
Here is an essential text by an important man, Maurice Allais: it was first of all a clairvoyant and caustic article published in Le Figaro of October 12, 19 and 26, 1998 (but still, much more, in the end, topical in 2007), in the Opinions section; then it was taken up and annotated in a fascinating book published by the Courageuses […]
GDP, growth and ecology: the inevitable blockage!
Following on from the previous news (GDP, sustainable development and ecology do not mix), here is a more detailed reasoning showing that GDP is very difficult to reconcile with the notion of econology and sustainable development. We based ourselves on a comparison of heating fuels but the reasoning is fairly transposable […]
GDP, sustainable development and ecology do not mix
We have just launched a reflection on the flaws of the main indicator of growth and, supposedly, of wealth: GDP. The objective of this reflection is to show, with supporting examples, that this indicator, GDP, is purely and simply incompatible with the notion of sustainable and ecological development. Yet it seems to us that […]
Download "Build and renovate your house"
"Build and renovate your house", the Leroy Merlin catalog. Econologie.com has no link with Leroy Merlin, we were simply pleasantly surprised by the importance devoted to the "ecological house" and the various "How to?" Guides. »Of this catalog hence its presence on the site. Find out more: The forum heating and thermal comfort Download […]
Heat transfer coefficient of air and common gases
Coefficients of thermal transmission (lambda) of the most common atmospheric gases (Air, Argon, Krypton and Xenon) Air is an excellent insulator, which is why it is used extensively in insulating materials. This article is part of a general article on Lambda heat transfer coefficients given in W / mK Air 0.025 Argon 0.017 Krypton 0.009 Xenon 0.0054 […]
Thermal transmission coefficients of base metals
Heat transmission coefficients (lambda) of the most common metals (Steel, Aluminum, Copper, etc.) No metal can be considered as an insulating material, but some metals conduct heat much better than others. For example, Copper and Zinc conduct heat 22 times better than certain stainless steels! This article is part of a […]
Floor insulation and floor coverings
Thermal transmission coefficients (lambda) of natural soils and common floor coverings (Linoleum…) This article is part of a general article on Lambda thermal transmission coefficients given in W / mK Natural soils: Clay or silt 1.50 Homogeneous rock 3.50 Sand and gravel (all sources) 2.00 Floor covering: Rubber 0.17 Linoleum 0.17 […] sheet
Insulating power of insulating materials (glass wool, rock wool, polystyrene, etc.)
Thermal transmission coefficients (lambda) of industrial insulating materials: wood or rock wool, Expanded or extruded polystyrene, Polyurethane, Phenolic, etc.) This article is part of a general article on Lambda thermal transmission coefficients given in W / mK Wool rock wool class RA1 0.017 Rock wool class RA2 0.041 Rock wool class RA3 0.038 […]
Insulation of natural wood and wood-based materials
Thermal transmittance coefficients (lambda) of wood and wood-based materials This article is part of a general article on Lambda thermal transmittance coefficients given in W / mK Light hardwood 435 <p <= 565 0.15 Heavy hardwood 750 <p <= 870 0.23 Medium-heavy hardwood 565 <p <= 750 0.18 Hardwood […]