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空气 ducts 温度 压力 摩擦 损失

参考 数据 与 工程 information about 空气 ducts 温度 压力 摩擦 损失 用于 暖通空调 systems applications.

airductstemperaturepressure

Overview

Engineering reference data for Air Ducts Temperature Pressure Friction Loss in HVAC systems.

Key Formulas

Sensible Heat

Q=m˙cpΔTQ = \dot{m} c_p \Delta T

Heat causing temperature change.

Latent Heat

Q=m˙hfgΔωQ = \dot{m} h_{fg} \Delta\omega

Heat causing moisture change.

COP (Cooling)

COP=Qc/WCOP = Q_c / W

Coefficient of performance.

Variables

SymbolDescriptionUnit
QQHeat transferW
m˙\dot{m}Mass flow ratekg/s
cpc_pSpecific heat of airJ/(kg·K)
ΔT\Delta TTemperature differenceK

References