Approximate Values of Heat Transfer Coefficient

Approximate Values of Heat Transfer Coefficient

Situation

Values (W/m^2.K)

Still Gases (Natural Convection)

5 - 10

Still Liquids (Natural Convection)

50 - 300

Flowing Gases (Forced Convection)

15 - 250

Flowing Liquids (Forced Convection)

100 - 5000

Boiling Liquids

2000 - 50000

Condensing Vapors

2000 - 50000

The higher the value of heat transfer the faster will be the heat transfer according to Newton's law of cooling.

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