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Heat transfer is the movement of thermal energy between objects at different temperatures. It occurs via conduction, convection, and radiation.
Trin-for-trin guide
- 1Select heat transfer type: conduction (through solid), convection (fluid motion), or radiation (electromagnetic)
- 2Enter relevant parameters: material properties, temperature difference, area, or thickness
- 3Results show heat flow rate in watts
Løste eksempler
Input
Conduction: k = 50 W/m·K, A = 2 m², ΔT = 10 K, L = 0.1 m
Resultat
Q = 10 kW
Using Fourier's law
Almindelige fejl at undgå
- ✕Mixing temperature scales in ΔT calculations
- ✕Neglecting radiation at high temperatures
Ofte stillede spørgsmål
Which heat transfer mode dominates?
It depends on conditions: conduction in solids, convection in fluids, and radiation for high temperatures or large temperature differences.
Why are insulators used?
Insulators have low thermal conductivity (k), reducing heat conduction rate; thicker insulators provide better protection.
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