The formula to calculate the direct normal radiation (DNR) is:
\[ DNR = \frac{GHI}{\cos(\theta)} \]
Where:
Direct Normal Radiation (DNR) is the amount of solar radiation received per unit area by a surface that is always held perpendicular to the rays that come in a straight line from the direction of the sun. It is an important parameter in solar energy applications, as it represents the intensity of sunlight that can be harnessed by solar panels and other solar energy systems. DNR is influenced by factors such as the angle of the sun, atmospheric conditions, and geographic location.
Let's assume the following values:
Using the formula to calculate the direct normal radiation (DNR):
\[ DNR = \frac{GHI}{\cos(\theta)} = \frac{800}{\cos(30^\circ)} = \frac{800}{0.866} \approx 923.78 \text{ W/m²} \]
The Direct Normal Radiation (DNR) is approximately 923.78 W/m².
