Final answer:
Refrigerant left in manifold gauges after charging a system remains there until next use or recovery. The refrigeration cycle is a process of heat transfer, work, and energy conservation, utilizing the principles of the Combined Gas Law to maintain cold temperatures within the refrigerator or freezer.
Step-by-step explanation:
When charging a refrigeration system using manifold gauges, the refrigerant in the hoses is typically not removed but remains within the manifold gauge setup. After the servicing procedure finished, the refrigerant that is left within the hoses usually stays there until the next usage. In some cases, technicians may recover the refrigerant from the hoses to minimize environmental impact and prevent loss of refrigerant.
The process inside a refrigerator or freezer during closed-door periods involves various stages of heat transfer, work input, and conservation of energy. An electrically driven compressor introduces work input (W) to raise the gas's temperature and pressure, pushing it into the condenser coils.
This cycle is based on the Combined Gas Law, illustrating how compressing a gas increases temperature, and conversely, expanding a gas lowers its temperature. The modern refrigerator effectively utilizes this principle to transfer heat from inside the cooling compartment to the outside environment, maintaining a consistently low temperature within the closed system.