Final control questions on the subject “heat engineering” The purpose and function of the subject. Working parameter. Status parameters. Base words and phrases

 
Base words and phrases: flat wall, scheme, temperature, amount of heat, flow 
The thermal conductivity of a flat single-layer wall refers to the ability of the wall to conduct heat 
through it, and is an important factor in building insulation. Here are some base words and 
phrases related to the thermal conductivity of a flat single-layer wall: 
- Flat wall: A flat single-layer wall is a common type of building material used for insulation. 
- Scheme: The thermal conductivity of a flat single-layer wall can be represented by a schematic 
diagram that shows the different layers of the wall and the direction of heat flow through it. 
- Temperature: The thermal conductivity of a flat single-layer wall depends on the temperature 
difference between the two sides of the wall. The greater the temperature difference, the higher 
the rate of heat transfer through the wall. 
- Amount of heat: The amount of heat that is transferred through a flat single-layer wall is 
proportional to the thermal conductivity of the material it is made of and the temperature 
difference across the wall. 
- Flow: The flow of heat through a flat single-layer wall is governed by Fourier's law, which states 
that the rate of heat transfer is proportional to the temperature difference and the thermal 
conductivity of the material. 
In summary, the thermal conductivity of a flat single-layer wall is a measure of its ability to 
conduct heat through it. The temperature difference between the two sides of the wall, the 
thermal conductivity of the material, and the schematic diagram of the wall all play a role in 
determining the rate of heat transfer through the wall. Finally, Fourier's law governs the flow 
of heat through the wall. 
We write Foure's law for this flat wall: 
we write this expression by dt 
by integrating the expression 
we get the expression 
22. Thermal conductivity of a multilayer wall.