What is Conduction Heat Transfer?
Conduction is the process by which heat energy is transmitted through collisions between neighboring atoms or molecules. It occurs primarily in solids where molecules are closely packed. Our Conduction Heat Transfer Calculator uses Fourier's Law to determine the rate at which heat moves through a material given its physical properties and the temperature gradient.
The Formula for Conduction (Fourier's Law)
The mathematical representation of steady-state heat conduction is given by the formula:
Q = (k × A × ΔT) / d
- Q: Heat transfer rate in Watts (W).
- k: Thermal conductivity of the material (W/m·K).
- A: Surface area through which heat is flowing (m²).
- ΔT: Temperature difference (T_hot - T_cold).
- d: Thickness or distance the heat must travel (m).
How to Use the Calculator
Using this online tool is straightforward for engineers, students, and HVAC professionals. Follow these steps:
- Thermal Conductivity: Enter the 'k' value for your material. For example, Copper is ~385 W/mK, while Wood is ~0.12 W/mK.
- Area: Input the total contact surface area in square meters.
- Temperatures: Enter the temperatures of the two surfaces. The calculator automatically finds the difference.
- Thickness: Enter how thick the material is in meters (convert centimeters or inches to meters first).
- Calculate: Click the button to see the heat flow rate in Watts.
Frequently Asked Questions
What are common k-values for materials?
Metals like Silver (429) and Copper (385) have high thermal conductivity, making them excellent conductors. Insulators like Polyurethane foam (0.02) or Glass Wool (0.04) have very low values, making them ideal for keeping heat contained.
Does the unit of temperature matter?
In the conduction formula, we use the temperature difference (delta). Since a difference of 1 degree Celsius is equal to a difference of 1 Kelvin, you can use either scale safely.