Calculadora de Red de Resistencias Térmicas
Calcula temperaturas en cada nodo de redes de resistencias térmicas serie y paralelo.
Fórmula
T_J = T_A + P_D × (θ_JC + θ_CS + θ_SA)
Cómo Funciona
Thermal resistance networks are mathematical models used to analyze heat transfer through complex systems by representing thermal paths as electrical-like resistance networks. Just as electrical circuits use resistors to model current flow, thermal resistance networks use thermal resistance components to model heat flow between different temperatures. Each thermal resistance represents the temperature difference per unit of heat transfer, analogous to electrical resistance representing voltage difference per unit of current.
Ejemplo Resuelto
Consider a multi-layer heat sink with three materials: aluminum (5mm thick), copper (2mm thick), and ceramic (3mm thick). Calculate the total thermal resistance: 1. Calculate individual layer resistances: R1 = thickness / (thermal conductivity * area) 2. Aluminum: R1 = 0.005m / (237 W/mK * 0.01m²) = 2.11 K/W 3. Copper: R2 = 0.002m / (401 W/mK * 0.01m²) = 0.50 K/W 4. Ceramic: R3 = 0.003m / (30 W/mK * 0.01m²) = 10.00 K/W 5. Total thermal resistance: Rtotal = R1 + R2 + R3 = 12.61 K/W
Consejos Prácticos
- ✓Always use consistent units throughout calculations
- ✓Consider contact thermal resistance at interfaces between materials
- ✓Use actual material thermal conductivity values from reliable sources
- ✓Account for geometric factors like surface area and material thickness
Errores Comunes
- ✗Neglecting contact thermal resistance between layers
- ✗Using incorrect thermal conductivity values
- ✗Forgetting to convert units properly
- ✗Assuming uniform heat distribution across complex geometries
Preguntas Frecuentes
What is thermal resistance?
Thermal resistance measures a material's resistance to heat flow, similar to electrical resistance. It's calculated as temperature difference divided by heat transfer rate.
How do thermal resistance networks relate to electrical circuits?
They use analogous principles: temperature difference is like voltage, heat flow is like current, and thermal resistance is like electrical resistance.
What factors affect thermal resistance?
Material thickness, thermal conductivity, cross-sectional area, and interface conditions all impact thermal resistance.
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