蒸気配管選定 — 速度と圧力 drop

蒸気 distribution 配管選定 based on 速度, 圧力 drop, と capacity tables.

steampipesizing計算機

Overview

Engineering reference data for Steam Pipe Sizing — Velocity and Pressure Drop in steam condensate.

$x = \frac{m_v}{m_{total}}$

Mass fraction of vapor in two-phase mixture.

$h = h_f + x \cdot h_{fg}$

Specific enthalpy of wet steam.

$m_{flash} = m_{liquid} \frac{h_f - h_{f2}}{h_{fg2}}$

Steam generated when condensate flashes to lower pressure.

$m_c = \frac{Q}{h_{fg}}$

Condensate generated by heat transfer.

Symbol	Description	Unit
$x$	Steam quality	—
$h_f$	Enthalpy of saturated liquid	kJ/kg
$h_{fg}$	Latent heat of vaporization	kJ/kg
$h$	Specific enthalpy	kJ/kg
$Q$	Heat transfer rate	kW