What chemical is used in chilled water?

What chemical is used in chilled water?

Chiller chemicals are used to control corrosion and to prevent bacteria growth. The most common chiller corrosion chemical is a closed loop nitrite, borate, silicate product. The second chemical is a cooling water biocide. The most common biocide used to control bacteria is gluteraldehyde and isothiazolin.

How do you treat chilled water?

Chemical Treatments for Closed-Loop Water Cooling

1. Sodium Nitrite. Sodium nitrite has been in use for many years to prevent corrosion in a wide variety of closed-loop systems.
2. Sodium Molybdate. Sodium molybdate is generally classified as an anodic oxidizing inhibitor.
3. Polymer Treatments.

What is chemical treatment system?

Chemical Treatment Systems. Specifically chosen for your conditions, these chemical treatment units automatically control the release of agents into your water to control scale, suspended solids, and microbiological growth in your system. Compact and flexible for your cooling tower and chilled water applications.

What is processed chilled water?

Process Chilled Water Systems (PCW) are compact, skid mounted systems that circulate process water at a consistent temperature and pressure to the application’s point of use and back, allowing for more efficient and stable use of water-cooled machines, equipment and instruments.

What type of water should be used in a chilled water system?

Water Glycol. Whether the equipment is using tap, city or steam distilled water, the use of industrial inhibited glycol and water mixture is recommended. Ethylene and Propylene are the two standard types of inhibited glycols commonly used.

What is chemical treatment of water?

Chemical treatments are techniques adopted to make industrial water suitable for use or discharge. These include chemical precipitation, chemical disinfection, chemical oxidation, advanced oxidation, ion exchange, and chemical neutralization.

Is chilled water corrosive?

Cooling tower water is corrosive to carbon steel equipment and the corrosivity depends on the water treatment, process conditions and outside environment. In this case, the corrosion rate was also enhanced by the galvanic effect of the stainless steel tubes and the carbon steel tubesheets and heads.

What is the proper procedure of chemical treatment?

Chemical treatment is used by most CB facilities. Treatment includes chlorination for disinfection purposes and oxidation of some impurities in the water. The water is then softened through the addition of lime to reduce alkalinity by removing magnesium and calcium bicarbonates.

What is chemical dosing system?

A chemical dosing system is a facility for automated injection of reagents into a wastewater network for the control of septicity and odour emissions. These systems are typically used at pump stations, sewer manholes, and rising mains.

What is processed chilled water used for?

Chillers are commonly used to remove heat from a process due to their ability to provide cooling capacity regardless of changes to the ambient temperature, heat load and flow requirements of the application.

How does a chilled water HVAC system work?

How Does a Chilled Water HVAC System Function? A chilled water system uses water instead of air to cool your home. The water absorbs heat from the home and disperses it outside. The system cools the water down to a temperature of 40 degrees and then circulates it through the water coil’s air handler.

What kind of chemicals are used in chilled water treatment?

The most common chemical based is a nitrate based chiller chemical designed to protect the entire water systems metallurgies from corrosion. Other chilled water chemicals may include biocides and are added as needed. How much chemicals do I add to my system?

How is the chilled water system re-filled?

The entire chilled water system is re-filled with fresh and clean water and treated with corrosion and scale inhibiting treatment chemical at the rate of 3Kg per cubic meter of the system volume or as applicable depending upon the chemical concentration.

Which is the most effective chiller water treatment?

Although chemical dosing is the most widely used method, to make the chemical treatment effective, it is recommended that more than one of the following methods should be used simultaneously in order to obtain the maximum benefits:

Is it necessary to do chemical treatment of water?

Therefore the chemical treatment of any water system is very much necessary on regular basis. Otherwise whole system can be damaged or chocked due to contamination’s. Before doing the chemical treatment of any water piping system the flushing is must.