How is the relief line capacity calculated for an R-717 system with a vessel diameter of 5m and length of 5m?

In the context of calculating the relief line capacity for an R-717 (ammonia) refrigeration system, it's important to understand how different values and formulas relate to each other in engineering practices.

The first option (C = fdl) suggests using a fundamental formula to calculate the capacity based on friction loss or flow characteristics in a system. This formula indicates a general approach for calculating capacity by considering factors like the flow characteristics of the refrigerant under pressure.

The second option (C = 2.5 x 5 x 5) involves a specific calculation that provides an estimation based on the given diameter and length of the vessel. This multiplication gives an example of a simplified method to calculate a related parameter of the system, potentially relating to the volume or flow rates based on the geometry of the vessel.

The third option (C = 62.5 kg of air/min) provides an explicit value that represents a capacity limit under operating conditions within the system. It specifies a practical outcome for how much relief capacity is needed, which may be critical for ensuring the system functions safely under pressure.

When combining these three components, the answer is supported by the idea that all methods contribute to understanding the overall relief line capacity for the system. Each choice