What medium does the generator receive in an absorption system?

In an absorption system, the generator plays a crucial role in the cycle of heat and mass transfer, and it specifically receives strong liquor. In this system, strong liquor is a concentrated solution containing a significant amount of refrigerant, which is often coupled with an absorbent.

When the strong liquor enters the generator, it is subjected to heat. This heat causes the refrigerant to evaporate from the strong liquor, thereby transforming it into a vapor that can then be collected for use in the refrigeration cycle. The process leverages the fact that the strong liquor has a high concentration of absorbent, which can efficiently pull the refrigerant out during heating.

The other options do not correctly describe the medium entering the generator because weak liquor refers to a diluted solution that is not concentrated enough for effective refrigerant extraction, condensed vapor pertains to the state of refrigerant after it has been absorbed and is not what the generator processes, and flash gas is generated when pressure is reduced on a liquid but does not serve as the medium that the generator receives.

Thus, strong liquor is the correct choice as it aligns with the operational dynamics of an absorption system's generator.