How to Hand Calculate QTC
QTC, or Quotable Thermal Conductivity, is a crucial factor in building design and energy efficiency. Understanding how to hand calculate qtc is essential for architects and engineers to create sustainable structures.
- Enter the dimensions of the wall in meters.
- Select the material of the wall.
- Click ‘Calculate’.
The formula for calculating QTC is:
QTC = (t * k) / (A * ΔT)
Where:
- t = thickness of the wall (m)
- k = thermal conductivity of the material (W/mK)
- A = area of the wall (m²)
- ΔT = temperature difference (K)
| Material | Thermal Conductivity (W/mK) |
|---|---|
| Concrete | 0.1 |
| Brick | 0.2 |
| Stone | 0.3 |
- Consider using insulation to reduce the thermal conductivity of your walls.
- Regularly maintain and repair your walls to prevent moisture buildup, which can increase thermal conductivity.
What is the difference between thermal conductivity and thermal resistance?
Thermal conductivity is the ability of a material to conduct heat, while thermal resistance is the ability of a material to resist heat flow.
How does moisture affect thermal conductivity?
Moisture can significantly increase the thermal conductivity of a material, as water conducts heat more efficiently than air.
Learn more about thermal conductivity from the U.S. Department of Energy
Explore more materials and their thermal conductivities from Engineering ToolBox