Trong HVAC, dien tich tiep xuc quyet dinh nhiet truyen giua khong khi, nuoc, moi chat lanh va kim loai.

Cong thuc chinh

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

Vi du thuc te

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

Tai nguyen lien quan

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