An evaporator is a device that helps turn liquid into vapor by applying heat. This process is commonly used in various industries, such as food processing and refrigeration. For example, in the food industry, evaporators can concentrate juices by removing water, making them easier to store and transport. In refrigeration systems, evaporators play a crucial role in cooling. They absorb heat from the surrounding air or liquid, causing the refrigerant inside to evaporate. This process cools the air or liquid, making it essential for devices like air conditioners and refrigerators to maintain a comfortable temperature.