The formula to calculate the Annual Heat Loss (AHL) is:
\[ AHL = \frac{ELR}{dT} \times 24 \times 365 \]
Where:
Annual heat loss refers to the total amount of heat lost from a building or system over the course of a year. It is calculated based on the energy loss rate, the design temperature difference, and the number of hours in a year. Understanding annual heat loss is crucial for designing efficient heating systems and improving energy conservation.
Let's say the energy loss rate (ELR) is 500 BTU/hr, and the design temperature difference (dT) is 50 F. Using the formula:
\[ AHL = \frac{500}{50} \times 24 \times 365 = 87,600 \text{ BTU/F} \]
So, the annual heat loss (AHL) is 87,600 BTU/F.