Closed circuit cooling tower is used to combine a heat exchanger and cooling tower into a single compact unit. The process fluid to be cooled is kept clean in a contaminant-free closed loop in contrast to open circuit cooling towers. The lower fouling of the closed loop reduces system energy consumption. The cooling fluid pressure drops are reduced by closed loop and the closed circuit tower are installed below the equipment to be cooled. It has its own flow of water that is sprayed onto the condenser water circuit pipes to cool them down indirectly. Its applications include water source heat pump loops, air compress, water-cooled chillers and distributed cooling loops.