Heat Flux Cooling Mode

Reference data and engineering information about heat flux cooling mode for thermodynamics applications.

heatfluxcoolingmode

Overview

Engineering reference data for Heat Flux Cooling Mode in thermodynamics.

Key Formulas

First Law

$\Delta U = Q - W$

Energy is conserved — heat added minus work done.

Ideal Gas Law

$PV = nRT$

Relates pressure, volume, and temperature of an ideal gas.

Heat Transfer

$Q = mc\Delta T$

Sensible heat transfer.

Carnot Efficiency

$\eta = 1 - T_C/T_H$

Maximum efficiency between two temperatures.

Variables

Symbol	Description	Unit
$U$	Internal energy	J
$Q$	Heat	J
$W$	Work	J
$P$	Pressure	Pa
$V$	Volume	m³
$T$	Temperature	K

Cooling Mode Heat Flux Data

8 rows

Maximum heat transfer flux for various cooling modes.
Cooling Mode	Heat Flux(kW/m²)
Free Convection Air	0.5
Forced Convection Air	5
Free Convection Immersion	10
Forced Convection Immersion	500
Forced Convection Boiling	1000
Impingement Air	10
Jet Immersion, single phase	400
Jet Immersion, boiling	900

Source: engineeringtoolbox.com

Data Notes

Conversion factor: $1 \, \text{Btu/ft}^2\text{h} = 3.1525 \, \text{W/m}^2$
Heat flux values are based on a surface temperature of $85^\circ \text{C}$ and an ambient temperature of $20^\circ \text{C}$ .

References

Original Source

Source: engineeringtoolbox.com