An evaporator is a device used to convert a liquid into vapor, typically by applying heat. This process is essential in various industries, including food processing, chemical manufacturing, and refrigeration. Evaporators help concentrate solutions by removing water or other solvents, making them more efficient for storage and transport. In refrigeration systems, evaporators play a crucial role in cooling. They absorb heat from the environment, causing the refrigerant inside to evaporate and cool the surrounding air. This process is vital for maintaining low temperatures in appliances like refrigerators and air conditioners.