Closed Recirculating Cooling Water System

Heat absorbed from the process must be dissipated to allow reuse of the water.

Closed recirculating cooling water system.

Nalco water offers a full array of cooling water treatment solutions including chemicals equipment automation and software designed to safely optimize cooling system performance while conserving water. In a closed system water circulates in a continuous cycle and is subjected to alternate cooling and heating without air contact. In closed recirculating systems or dry cooling towers heat absorbed by the cooling water is either transferred to a second coolant or released into the atmosphere. However the closed circuit cooling tower isolates process cooling fluids from exposure to the air by means of heat exchange tubes or coils.

An open recirculating cooling system uses the same water repeatedly to cool process equipment. But often overlooked are auxiliary closed cooling water ccw systems which also serve vital functions. Or it might include the use of industrial air washers in which. In a closed system water circulates in a closed cycle and is subjected to alternate cooling and heating without air contact.

Industrial cooling towers and closed loop efficiency can be adversely affected by corrosion scaling fouling and biological contamination. Instead of having an evaporative cooling tower the closed circulating system basically consists of two heat exchangers and a circulating pump. It might utilize a cooling coil below the deck of the cooling tower. In closed recirculating system cooling water is circulates in closed loop means within the system pipes and heat exchangers.

Closed recirculating system dry cooling tower. Cooling towers spray ponds and evaporative condensers are used for this purpose. The word dry is used because the water is never exposed to the air and as a result very little water is lost. The heat absorbed from the plant process is generally dissipated by air cooling.

Like the open circuit system it also utilizes evaporative cooling. A closed cooling water system is called a closed loop closed circuit or closed recirculating system. Loss from the system is very less and little make up is required hence concentration of salt in the water is very less. Heat absorbed by the water in the closed system is normally transferred by a water to water exchanger to the recirculating water of an open recirculating system from which the heat is lost to atmosphere figure 32 1.

Failure of a closed system has the potential to shut down a portion if not all of the plant.