Final answer:
To ensure the efficiency of an A/C system, avoid trapping non-condensable gases and creating turbulence when transferring refrigerant. Air gaps in containers prevent rupture from compression resistance, and the compression/expansion process requires energy.
Step-by-step explanation:
When transferring refrigerant liquid from a recovery unit to an air conditioning system, it is important to avoid trapping non-condensable gases and to prevent creating turbulence. Turbulence can lead to wasted energy and decreased efficiency of the system. During the transfer, the system's efficiency drops if the velocity exceeds 0.16 m/s, which leads to unnecessary turbulence. Moreover, when dealing with compressed gases or refrigerants, care must be taken not to tightly cap a tank or container to prevent overflow because both liquids and solids resist compression with very large forces. A rigid container should have air gaps to allow it to expand and contract without being stressed, preventing leakage or bursting. Furthermore, the process of compression and expansion of gases requires energy and can cause surrounding areas to become cold due to energy being taken away by the escaping gas molecules.