免费热导率计算器
计算材料的热传导率，评估隔热性能。
Heat Flow Rate
80.00 W
Heat Flow Rate vs Thermal Conductivity (k)
公式
## Thermal Conductivity (Fourier's Law) Fourier's law describes the rate of heat conduction through a material. ### Formula **Q/t = k * A * DeltaT / d** where k is thermal conductivity, A is area, DeltaT is temperature difference, and d is thickness. Lower k means better insulation.
计算示例
Heat loss through a 10 m² wall, 10 cm fiberglass insulation (k=0.04), 20°C temperature difference.
- 01Q/t = k * A * DeltaT / d
- 02Q/t = 0.04 * 10 * 20 / 0.1
- 03Q/t = 8 / 0.1
- 04Q/t = 80 W
常见问题
What materials have the highest thermal conductivity?
Silver (429), copper (401), and aluminum (237) in W/(m·K). Metals are generally excellent conductors.
What makes a good insulator?
Materials with very low thermal conductivity: fiberglass (~0.04), styrofoam (~0.03), aerogel (~0.015), and still air (~0.025 W/(m·K)).
How does wall thickness affect heat loss?
Heat loss is inversely proportional to thickness. Doubling the insulation thickness halves the heat loss rate.
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