ML Consultancy Hyderabad

Thermal transmittance (U) from the individual thicknesses and conductivities

Layer 1 (e.g., Air Film): Thickness x₁ (m): Thermal Conductivity k₁ (W/m·°C):

Layer 2 (e.g., Condensate Film): Thickness x₂ (m): Thermal Conductivity k₂ (W/m·°C):

Layer 3 (e.g., Scale Film on Steam Side): Thickness x₃ (m): Thermal Conductivity k₃ (W/m·°C):

Layer 4 (e.g., Metal Wall): Thickness x₄ (m): Thermal Conductivity k₄ (W/m·°C):

Layer 5 (e.g., Scale Film on Water Side): Thickness x₅ (m): Thermal Conductivity k₅ (W/m·°C):

Layer 6 (e.g., Water Film): Thickness x₆ (m): Thermal Conductivity k₆ (W/m·°C):

Note:

This calculator computes the overall thermal transmittance (U) of a multi-layer system. For each layer, you need to enter two key values:

Thickness (x): The physical thickness of the layer in meters. This represents how thick the material is.
Thermal Conductivity (k): The material’s ability to conduct heat, measured in W/(m·°C). Lower conductivity means better insulation.

Enter the values for up to six layers (use 0 for any layer that does not exist). The calculator sums the thermal resistances (thickness divided by conductivity) of all layers and then calculates the overall U-value by taking the reciprocal of that sum.

A lower U-value indicates better insulation, meaning less heat is transferred through the structure, while a higher U-value indicates more heat flow.

Real-Life Application: Consider a building wall composed of multiple layers, such as an exterior brick, an insulating layer, and interior plasterboard. By inputting the thickness and conductivity of each layer, you can determine the overall U-value of the wall. A lower U-value means the wall is more energy-efficient, helping to reduce heating or cooling costs.