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External pipe diameter

External diameter of a fluid-filled heat source or heat sink.

Symbol
$Do_{hsp}$
Unit
mm
Formulae
$Di_{hsp}+2t_{hsp}$
Related
$Di_{hsp}$
Internal diameter of fluid-filled pipe [mm]
$t_{hsp}$
Thickness of pipe [mm]
Used in
$A_{hsi}$
Cross-sectional area of insulation [mm$^2$]
$A_{hsp}$
Cross-sectional area of fluid-filled pipe [mm$^2$]
$D_{hsi}$
Diameter over insulation [mm]
$T_{hsi}$
Thermal resistance of insulation [K.m/W]
$T_{hsp}$
Thermal resistance of fluid-filled pipe [K.m/W]
$U_{wall}$
OHTC of pipe wall [W/(K.m$^2$)]