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Theory of heat diffusion

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We have sample with form of cube. And source of  heat has form cube too. Our goal to calculate thermal conductivity of the material. Very important to understand is it possibility to use this material in Siberia. Formula what defines thermal process:  P = k* S*(dT/H) P - value of heat flow; k -  coefficient thermal conductivity - this is our; S - area of loss of heat; dT = (Tout - Tinside) - difference temperature inside and outside; H - thickness of element; Formula of thermal conductivity: k =  (P*H)/(S*dT) This formulas works for parallelepiped and perpendicular vector of heat flow . It should be noted to things: heat transfer occurs in three ways: 1. T hermal conductivity; 2. Сonvective heat transfer; 3. Heat transfer by radiation; Convective heat transfer impossible because there are lot a very small volumes of air inside sample. Radiation is excluded since sample is not transparent. That why in out case we have only one way to loss of...
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About straw-and-clay material

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I mean the material usually named adobe or a sun-dried brick or a hand-formed brick or a cob. As a rule this material consist from 70-80% clay and 30-20% straw. But in my case it is just 20-30 % clay and 70-80% straw. It is named lightweight-cob or a lightweight-straw-and-clay. I red about this material and saw how people use it in warm regions of insulation for walls. But it makes more questions if use it in cold regions like a Siberia. How it can works in severe frosts? How long years it have a good insulation? What could be thick of walls for keep heat inside the house? All understands that then less thickness of walls them less cost of building. That is why I started experiments with lightweight-straw-and-clay material (LSCM). Main goal of experiments were to calculate a thermal conductivity of the material. For this, I made several experimental samples in the form of a cube. In each ones I made hole for thermal source. The samples was created three ...
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About what this blog?

This blog about my house in Siberia. I began to construct the house in 2011 and then I started write blog about technologies of building of eco-house. But I wrote my blog on Russian. And now I decide to translate my blog on English. You will read about eco-materials and experiments with them. Also about energy efficient technologies. Welcome!
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