Question

Given: Surface conductance = 20 W/m²°C, U-value of the wall = 1.2 W/m²°C, and solar gain factor = 0.66. Find the solar gain factor for a wall.

Hint:

The solar gain factor can be calculated using the U-value and surface conductance.

Answer 1

Correct Answer: 0.03

The formula for solar gain factor: \[ U = \frac{1}{\text{Conductance}} \times \text{Solar Gain Factor} \] Rearranging the equation: \[ \text{Solar Gain Factor} = U \times \text{Conductance} \] \[ = 1.2 \times 0.66 = 0.792 \] Thus, \[ \boxed{0.79} \]