In refrigeration, what happens when the refrigerant in the evaporator coil absorbs heat?

When the refrigerant in the evaporator coil absorbs heat, it undergoes a phase change from liquid to gas, which is known as evaporation. This process occurs at low temperatures and pressures and enables the refrigerant to absorb a significant amount of heat from the surrounding air or the space that needs to be cooled. As the refrigerant evaporates, it effectively lowers the temperature of the air passing over the evaporator coil, which is why the air is cooled.

This cooling effect is essential for the operation of refrigeration and air conditioning systems, as it helps maintain comfortable indoor temperatures. The absorbed heat is then carried away by the refrigerant as it moves to the compressor, where it will eventually be released into the environment during the condensation process. Thus, this absorption of heat is a fundamental part of how cooling systems work.