Understanding Dry Compression in Refrigeration Systems

In refrigeration systems, the compressor is a key component responsible for increasing the pressure of the refrigerant. The state of the refrigerant entering the compressor is crucial for the system's efficiency and longevity.

The question asks about the specific process where the compressor handles only vapors. Let's look at the relevant terms:

• Compression: The process of increasing the pressure of a fluid.
• Refrigerant: The working fluid in a refrigeration cycle that absorbs and releases heat.
• Vapor: The gaseous state of the refrigerant.

In the context of refrigeration compressors, two terms are commonly used to describe the state of the refrigerant entering the compressor:

• Wet Compression: This occurs when the refrigerant entering the compressor is a mixture of liquid and vapor. Compressing liquid can cause serious damage to the compressor components like valves and pistons.
• Dry Compression: This occurs when the refrigerant entering the compressor is solely in the vapor phase. Ideally, the refrigerant at the compressor inlet is slightly superheated vapor to ensure that no liquid enters the compressor. This practice helps prevent mechanical damage and ensures efficient operation.

Based on these definitions, when a compressor in an actual refrigeration system handles vapours only, this process is referred to as Dry compression.

Handling only vapor is the desired condition for most refrigeration compressors because liquid is virtually incompressible and can lead to damage. Therefore, systems are designed to ensure the refrigerant is in a dry (vapor) or slightly superheated vapor state before entering the compressor.

Thus, the term that specifically describes the compressor handling only vapors in refrigeration systems is Dry compression.