V HVAC urcuje kontaktni plocha prenos tepla mezi vzduchem, vodou, chladivem a kovem.

Klicovy vzorec

Q = h x A x ΔT
Round duct: A = πDL
Rectangular duct: A = 2(W + H)L

Prakticky priklad

Example: D = 0.30 m, L = 12 m. A = π x 0.30 x 12 = 11.31 m2.

Souvisejici zdroje

Use Cylinder Calculator, Pipe Calculator, and pipe insulation guide.