Dowtherm A Pysical Properties

Overview

Engineering reference data for Dowtherm A Pysical Properties in HVAC systems.

Key Formulas

Sensible Heat

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

Heat causing temperature change.

Latent Heat

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

Heat causing moisture change.

COP (Cooling)

$COP = Q_c / W$

Coefficient of performance.

Variables

Symbol	Description	Unit
$Q$	Heat transfer	W
$\dot{m}$	Mass flow rate	kg/s
$c_p$	Specific heat of air	J/(kg·K)
$\Delta T$	Temperature difference	K

Physical Properties

The following table summarizes the key physical properties of DOWTHERM™ A.

Operational Conditions

DOWTHERM™ A is a eutectic mixture of biphenyl ($C_{12}H_{10}$) and diphenyl oxide ($C_{12}H_{10}O$). Its suitable operating ranges are:

• Liquid Phase Systems: 15 °C to 400 °C (60 °F to 750 °F)
• Vapor Phase Systems: 257 °C to 400 °C (495 °F to 750 °F)

References

• Original Source