We can identify, inspect, treat, and audit various closed water systems.

HVAC systems make up the majority of closed cooling water systems but industries and processes around the globe are filled with various other closed water systems. Chemenergy is well versed in handling these other closed water systems that are less common. Other closed water systems include but are not limited to:

Glycol systems:

Glycol systems are exactly the same as regular HVAC systems except the chilled fluid is commonly a 50:50 mixture of water with either ethylene or propylene glycol for freeze protection. If non-toxic water is needed for use around food sources then propylene glycol is used because of the potential contact with food, food products or pharmaceuticals.

Severe service cooling systems:

When very high heat transfer rates are needed closed loops are often used. Some examples include blast furnace cooling and continuous caster mold cooling in steel mills. High dosage, specially formulated water treatment chemicals and demineralized water is often needed to protect these systems.

Low conductivity systems:

Low conductivity water is often needed in electric furnaces and other industrial equipment. In order to achieve low conductivity high purity water is used and nonionizing organic chemicals are used for treating purposes.

Closed heating systems:

A closed water system in which the water is heated, rather than cooled, inside of a hot water heating boiler is a closed heating system. The water can be heated by a firetube boiler or a steam/water heat exchanger. Chemical treatment remains the same as a chilled water system but the dosing will be higher.

Chilled water storage:

This water system's operational hours differ from normal HVAC systems. Chilled water storage systems run at night when electricity rates are lower in order to make chilled water. This chilled water is then stored in underground tanks and used for comfort cooling purposes during normal daylight hours. Another common version of this system is an ice storage set-up. A refrigeration machine makes ice at night and then uses it to cool chilled water during the day. This is especially common on college campus facilities where the chilled water needs to be circulated to many different, seperate building areas that are sometimes far away.

Mixed piping systems:

There are "four-pipe systems" and "two-pipe systems located in commercial facilities. Four-pipe systems are the most sophisticated designs and and include seperate supply and return pipping for hot and chilled water and separate pipping inside the coils. Two-type systems the same piping is used for the hot and chilled water instead of designing them separate, The water types will mix every time the system is switched between hot and chilled settings. Custom treatment plans need to be in place to address this issue and compatibly treat both effectively.