The chilled water system consists of a chilled water circulating pump connected to the chiller evaporator and various cold water equipment (such as air conditioners and fan coils) of the user through a pipeline system. The core of its monitoring and control tasks are:
(1) Ensure that the evaporator of the freezer passes enough water to make the evaporator work normally and prevent freezing damage.
(2) Provide enough water to the chilled water users to meet the usage requirements.
(3) Reduce the power consumption of the circulating water pump as much as possible on the premise of meeting the requirements of use. 
The chilled water system is responsible for transporting the chilled water prepared by the refrigeration device to the air treatment equipment. Generally, it can be divided into a closed system and an open system.
For variable flow regulation systems, closed systems are often used. The closed system is characterized by less contact with the outside air, which can slow down the corrosion of the pipeline. The refrigeration device adopts a shell-and-tube evaporator, which is often used in the cooling system of a surface cooler. The constant flow control system often uses an open system, which is characterized by the need to set up a cold water tank and a return tank, the system has a large water capacity, and the refrigeration device uses a water tank evaporator for the spray room cooling system.
In order to ensure the water balance of the closed system, an automatic adjustment device is installed between the main water supply pipe and the main return water pipe. The daily water supply decreases and the pressure difference in the pipeline increases, so that a part of the cold water flows directly into the main return pipe to ensure refrigeration. The normal operation of the device and the water pump.
Click below for specific product details: Chilled Water Coils.