Ductwork 選定 — 速度と摩擦 method

Hvac duct 選定 using 速度 method と equal 摩擦 method with recommended velocities.

ductworksizingvelocity計算機

Overview

Engineering reference data for Ductwork Sizing — Velocity and Friction Method in HVAC systems.

$Q = \dot{m} c_p \Delta T$

Heat causing temperature change.

$Q = \dot{m} h_{fg} \Delta\omega$

Heat causing moisture change.

$COP = Q_c / W$

Coefficient of performance.