When performing a heat load calculation for a walk-in cooler or freezer, which factors must be considered?

In the context of heat load calculations for a walk-in cooler or freezer, heat transmission, air infiltration, and product load are essential factors to consider.

Heat transmission refers to the heat that enters a cooler or freezer through the walls, ceiling, and floor due to temperature differences between the inside and outside environments. This heat gain can significantly impact the cooling requirements.

Air infiltration involves the unintended exchange of outside air with the inside air when doors are opened or through cracks and openings. This can lead to additional cooling load, as outside air typically carries a different temperature than the desired internal temperature.

Product load accounts for the heat added to the cooler or freezer from the products being stored inside. When warm products are introduced, they raise the overall temperature of the stored environment, requiring the cooling system to work harder to maintain the desired temperature.

Thus, incorporating heat transmission, air infiltration, and product load is critical for accurately calculating the cooling needs of a walk-in cooler or freezer, ensuring it operates efficiently and effectively.