EngiRef / Thermodynamics Engineering Formula
Overall Heat Transfer Coefficient
Overall Heat Transfer Coefficient: Combined convection-conduction-convection resistance. A Heat Transfer formula in thermodynamics engineering.
Heat Transfer
Specification
- Name
- Overall Heat Transfer Coefficient
- Discipline
- thermodynamics
- Category
- Heat Transfer
- LaTeX
- \frac{1}{U} = \frac{1}{h_1} + \frac{t}{k} + \frac{1}{h_2}
- Description
- Combined convection-conduction-convection resistance
- Conditions
- Plane wall with convection on both sides
- Can solve for
- U
- Tags
- overall, heat, transfer, coefficient, resistance
Variables
| Symbol | Name | Unit | Si Unit |
|---|---|---|---|
| U | Overall HTC | W/(m²·K) | W/(m²·K) |
| h₁ | Convection Coeff 1 | W/(m²·K) | W/(m²·K) |
| h₂ | Convection Coeff 2 | W/(m²·K) | W/(m²·K) |
| t | Wall Thickness | m | m |
| k | Thermal Conductivity | W/(m·K) | W/(m·K) |
Common questions
- What is the Overall Heat Transfer Coefficient formula?
- Combined convection-conduction-convection resistance. It sits under Heat Transfer, Thermo engineering in the EngiRef reference.
- What do the symbols in the Overall Heat Transfer Coefficient formula mean?
- In Overall Heat Transfer Coefficient, U is overall htc in W/(m²·K); h₁ is convection coeff 1 in W/(m²·K); h₂ is convection coeff 2 in W/(m²·K); t is wall thickness in m; k is thermal conductivity in W/(m·K).
- When does the Overall Heat Transfer Coefficient formula apply?
- Overall Heat Transfer Coefficient holds under this condition: Plane wall with convection on both sides.