Final answer:
In an absorption refrigeration system, the generator, condenser, and absorber are on the high-pressure side, with the condenser playing a key role in converting refrigerant gas into liquid.
Step-by-step explanation:
In an absorption refrigeration system, the parts that are considered to be on the high-pressure side, or "high side," are typically those where the refrigerant is in a high-pressure state during the cooling cycle. They are critical components in managing the phase changes and pressure conditions that enable the refrigeration cycle to occur. In this system, the generator (A), where the refrigerant is heated and vaporized; the condenser (C), where the vapor refrigerant releases its heat and condenses back into a liquid; and the absorber (B) are considered to be on the high side. In contrast, the evaporator (D) is considered to be on the low-pressure side as it is where the refrigerant absorbs heat and evaporates.
The condenser, referenced in a component of an air conditioner, acts to convert gas into a liquid, as indicated by option A in the referenced question, reinforcing its role in the high-pressure side of the system.
Refrigeration systems work by transferring heat from a low-temperature area to a high-temperature area, essentially functioning as a reverse heat engine. This is why components like the condenser and generator, which deal with the warm side of the refrigeration cycle, are under high pressure.