What does the vapor line do in a refrigeration system?

In a refrigeration system, the vapor line is responsible for carrying low-pressure vapor refrigerant from the evaporator to the compressor. This is a critical function as it ensures that the refrigerant, having absorbed heat from the space or substance being cooled, is delivered to the compressor where it can be compressed into a high-pressure gas.

The process begins when the liquid refrigerant evaporates in the evaporator coils; as it absorbs heat, it turns into a vapor. This low-pressure vapor then travels through the vapor line toward the compressor. Once reaching the compressor, the vapor is compressed, resulting in a higher pressure and temperature, which prepares it for the next stages of the refrigeration cycle, including the condenser.

This role of the vapor line is crucial for the overall efficiency and function of the refrigeration system, as it directly affects how well the system can transfer and maintain cooling within the designated area. The other choices focus on different aspects of the refrigeration system, such as liquid transport and flow regulation, but do not accurately represent the specific function of the vapor line in relation to the vapor refrigerant.