The main |
Parts |
Heat |
Chart of nomograms |
Reference information |

The thermal stream transmitted through a wall, pays off by formula

**q = l · F · (T _{2} - T_{1}) / d,
[1]**

where

**l** – thermal conductivity of a material of a wall, W/(m·Ê);

**F** – wall surface area, m^{2};

**T _{2} - T_{1}** – difference of temperatures of surfaces of a wall,

**d** – thickness of a wall, m.

The circuit design of nomographs is presented in drawing 1.

After applet start an auxiliary window will have the following appearance (drawing 2).

In an auxiliary window the circuit design of disposing of nomographs is already shown, but she demands recurring feeding into, therefore on each small square which is marking out a nomograph "is clicked" by the right key of the mouse and the left key "clicked"on that place where there should be a colour flag indicator (a place of disposing of meaning of parametre Z of a nomograph). It is possible choose any other location of variable parametre Z. After recurring appointment of the circuit design of nomographs "is clicked" by the left key of the mouse on sign "[-]", had in left overhead to the angle of the circuit design of nomographs. It will change the aspect on "[+]". It means, that the circuit design of nomographs is fixed. .

After attaching of the circuit design of nomographs, "is in succession clicked" on everyone sign, marking out a nomograph, and it is pushed three buttons "In the working memory" ("Â ÎÇÓ"), "Substitution ID" ("Ïîäñòàíîâêà ÈÄ"), "the Total formula" ("Èòîãîâàÿ ôîðìóëà") for entering of all parametres of a nomograph into an on-line storage and design formula formation.

We transfer to the basic window and we induct meanings of steps on axes "X" and "Y". We push the button "to Build on ID" ("Ïîñòðîèòü ïî ÈÄ").

More detailed instruction on operation with an applet.

*Topic of the section: calculation of heat flux through a flat homogeneous wall.*

graphic-analytical systems

Copyright © 2005-2022 All rights reserved