Heat Transfer Calculator

Real-time thermodynamics calculations for conduction, convection, and radiation

Real-Time Advanced UI Professional

Conduction Heat Transfer

W/m·K
Material property indicating ability to conduct heat
m²
m
°C
Temperature difference across the material
W/m²·K
Higher values indicate stronger convection
m²
°C
°C
Unitless (0-1)
0 = perfect reflector, 1 = perfect emitter
m²
K
Temperature in Kelvin for radiation calculations
K
W/m·K
m
W/m·K
m
m²
°C
W/m²
K/W
J/K
seconds

Calculation Results

Heat Transfer Rate
10000
W
Steady-state conduction heat transfer through a plane wall
Heat Flux
100000
W/m²
Heat transfer per unit area
Thermal Resistance
0.001
K/W
Temperature Gradient
2000
°C/m

Heat Transfer Visualization

Hot Side: 100°C Cold Side: 0°C
Lower Heat Flow
Higher Heat Flow
Heat Flow Direction

Calculation History

Mode Result Time Action

Understanding Heat Transfer Calculations

How to Use This Heat Transfer Calculator

This advanced heat transfer calculator provides real-time calculations for various heat transfer modes used in thermodynamics and engineering applications. Here's a guide to maximize its utility:

1. Select the Heat Transfer Mode

Choose between conduction, convection, radiation, composite wall, or advanced calculations using the mode selector at the top of the calculator.

2. Input Your Parameters

For each mode, enter the required parameters. The calculator provides real-time updates as you change values. Use the material/fluid selectors to quickly set common values.

3. Interpret the Results

The calculator provides four key results: heat transfer rate (Q), heat flux (q"), thermal resistance (R), and temperature gradient (dT/dx). These help you understand both the magnitude and efficiency of heat transfer.

4. Use the Visualization

The heat transfer visualization shows how heat flows through materials, with colors indicating intensity and direction. This helps intuitively understand your calculation results.

5. Save and Export

Use the "Save Calculation" button to store results in the history table. You can export the entire history as a CSV file for further analysis.

Key Heat Transfer Formulas Used

  • Conduction (Fourier's Law): Q = k·A·ΔT/L
  • Convection (Newton's Law of Cooling): Q = h·A·(T_s - T_∞)
  • Radiation (Stefan-Boltzmann Law): Q = ε·σ·A·(T_h⁴ - T_c⁴)
  • Thermal Resistance: R = L/(k·A) for conduction, R = 1/(h·A) for convection
  • Heat Flux: q" = Q/A

This calculator uses these fundamental equations to provide accurate, real-time results for engineering applications, HVAC design, insulation analysis, and thermodynamic studies.

Pro Tips for Accurate Calculations
  • Ensure consistent units throughout your calculation
  • For radiation calculations, use absolute temperature (Kelvin)
  • Composite wall calculations assume perfect contact between layers
  • Convection coefficients vary significantly with fluid velocity
  • Emissivity values range from 0 (perfect reflector) to 1 (blackbody)
  • Thermal conductivity is temperature-dependent for many materials
Common Applications
  • Building insulation design
  • Heat exchanger analysis
  • Electronic cooling systems
  • HVAC system design
  • Industrial process heating
  • Solar thermal energy systems