A DX refrigeration system is a type of refrigeration system that utilizes direct expansion (DX) technology to cool air or other substances. This type of system is often used in commercial and industrial settings, such as supermarkets, restaurants, and warehouses. DX refrigeration systems are designed to be more efficient than traditional refrigeration systems, as they use less energy and require less maintenance. The DX system works by utilizing a compressor to cool a refrigerant, which is then circulated through a series of coils. As the refrigerant passes through the coils, it absorbs heat from the air or other substance, cooling it in the process. The cooled air or substance is then released back into the environment. The DX system is a cost-effective way to cool large areas, and is often used in conjunction with other cooling systems, such as evaporative cooling or chilled water systems.