The formula to calculate the Heat Transfer through a Plane Wall or Surface is:
\[ \text{Heat Flow Rate} = -\frac{\text{Thermal Conductivity} \times \text{Cross Sectional Area} \times (\text{Outside Temperature} - \text{Inside Temperature})}{\text{Width of Plane Surface}} \]
Heat Flow Rate is the amount of heat that is transferred per unit of time in some material, usually measured in watt. Thermal Conductivity is the rate at which heat passes through a specified material. Cross Sectional Area is the area of a two-dimensional shape that is obtained when a three-dimensional shape is sliced perpendicular to some specified axis at a point. Outside Temperature is the temperature of air present outside. Inside Temperature is the temperature of air present inside. Width of Plane Surface is the measurement or extent of the plane surface from side to side.
Let's assume the following values:
Using the formula:
\[ \text{Heat Flow Rate} = -\frac{10.18 \times 11 \times (321 - 371)}{7} \approx 799.857142857143 \, \text{Watts} \]
The Heat Flow Rate is approximately 799.857142857143 Watts.
| Thermal Conductivity (W/m·K) | Heat Flow Rate (Watts) |
|---|---|
| 9 | 707.142857142857110 |
| 9.5 | 746.428571428571445 |
| 10 | 785.714285714285666 |
| 10.5 | 825.000000000000000 |
| 11 | 864.285714285714334 |