Compute thermal resistance R_th = L/(k·A) from thickness, conductivity and area for heat transfer analysis of multi-layer insulation.
输入厚度 L、导热系数 k、面积 A,求热阻。
| Item | Formula / Note | Source / Standard |
|---|---|---|
| Conductive thermal resistance | R = L / ( k · A ), where L is thickness, k conductivity and A area | ISO 80000-5:2019, Quantities and units - Part 5: Thermodynamics (thermal resistance) |
| One-dimensional steady conduction | Q = ΔT / R, formally analogous to Ohm's law | Fourier's law; Incropera FP, DeWitt DP, Fundamentals of Heat and Mass Transfer |
| Units | Thermal resistance is expressed in K/W | ISO 80000-5:2019, Quantities and units - Part 5: Thermodynamics |
| Multilayer wall | For a multilayer wall the total resistance is the sum of the layer resistances | Incropera FP, DeWitt DP, Fundamentals of Heat and Mass Transfer |