Final answer:
Scroll compressors are least tolerant of liquid floodback due to their design, which can be damaged by non-compressible liquids, unlike reciprocating compressors that have more protection.
Step-by-step explanation:
The compressor design least tolerant of liquid floodback is typically the scroll compressor. These compressors rely on the smooth, continuous movement of one spiral against another to compress the refrigerant. If liquid refrigerant enters the compression chamber, it can cause damage since liquids are not compressible. This is in contrast to other designs, like the reciprocating compressor, which can handle slight amounts of liquid due to the presence of suction valves that offer some protection.
It is crucial to ensure that systems utilizing scroll compressors have proper refrigerant management. This can include devices such as accumulator tanks designed to prevent liquid refrigerant from returning to the compressor, and maintaining an adequate superheat at the compressor inlet to ensure refrigerant vaporization.