Principle and application Module of closed cooling tower is red copper coil with high heat transfer efficiency, allows working fluid. (purified water or other liquid ) pipeline pass though, makes heat exchange with air though fan to complete at a time so as to achieve energy efficiency and environmental protection and maintain pipeline cooled clean and smooth. It is available to for long-term operation by connecting water inlet and outlet. At user's side. It is another high-end choice for modern industrial cooling and is widely applicable to complete induction and heating equipment. IF furnace, die casting machine, etc.