Hvac Chilled Water System

About chilled water systems hvac hydronics chilled water systems are mainly used in large commercial hvac air conditioning systems and industrial cooling applications although there are some residential and light commercial hvac chilled water systems in use.

Hvac chilled water system.

Left untreated the open loop can scale corrode and provide an encouraging environment for biological growth. An air cooled condenser uses no water on site and requires no on site water treatment while a water cooled system of any size requires that the open loop be treated. The water leaves the chilled water evaporator at 45 f or 7 c. With the pump on running condition slowly close the discharge valve for a period of less than 1 minute.

The chilled water absorbs the heat from the building. If the flow rate in the secondary side is low then some chilled water will flow into the secondary and some will recirculate back to the chillers. In chilled water plants the ordinary water or brine solution is chilled to very low temperatures of about 6 to 8 degree celsius by the refrigeration plant. The chilled water is generated and circulated in the primary side the secondary loops will pull chilled water out of the header to cool the building and then dump the warm return back into the header.

This water can be provided by a central building chilled water plant an off site utility that sells chilled water or by the tenant s own packaged chiller. How chilled water air conditioning works. It then returns to the chiller where the chiller removes the heat from the water using the refrigeration process. Chilled water system basics chilled water systems provide cooling to a building by using chilled water to absorb heat from the building s spaces.

This chilled water is pumped to various floors of the building and its different parts. Chillers use the refrigeration cycle to remove heat from chilled water. So the cop equation to measure efficiency of producing chilled water can be expressed as shown in equation 3. Chilled water systems include other hvac equipment designed to exchange heat such as computer room air conditioners.

Instead of the traditional air conditioning system consider a system that produces hot water and the additional benefit of chilled cold water. Chilled water systems utilize a constant source of water at a temperature of approximately 45 f. Chilled water systems are popular because they use water as a refrigerant. Set all the supply return valves and control valves in the system at full open position cooling coil valve fully open to cooling coil chilled water flow through the ahu etc.

The third type of water based air conditioning system is called a chilled water system. This chilled water is then circulated through the entire building by the use of a pump.