Heat Transfer Calculator
Calculate heat transfer rate by conduction through a material.
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Enter the thermal conductivity of the material, the cross-sectional area, the temperature difference across the material, and the material thickness. The calculator computes the heat transfer rate in watts.
About Heat Transfer
Fourier's law of heat conduction states that the rate of heat transfer is proportional to the temperature gradient and the cross-sectional area, and inversely proportional to the thickness. The proportionality constant is the thermal conductivity of the material. This law is fundamental in engineering for designing insulation, heat exchangers, building walls, and electronic cooling systems.
Frequently Asked Questions
What is thermal conduction?
Thermal conduction is the transfer of heat through a material from a region of higher temperature to lower temperature. It occurs through molecular collisions and is described by Fourier's law.
What is thermal conductivity?
Thermal conductivity (k) measures how well a material conducts heat. Metals have high values (e.g., copper: 385 W/m K), while insulators have low values (e.g., wood: 0.15 W/m K).
What is the difference between heat transfer rate and heat flux?
Heat transfer rate (Q) is the total power in watts flowing through the material. Heat flux is the rate per unit area (W/m2), found by dividing Q by the cross-sectional area.