Existing Issues
Existing Issues
Closed loop water HVAC systems and closed loop hot water production systems (primary burner) often present issues that are caused by the circulation of corrosion products, in the form of dark-colored mud, and eventually with time cause damage on the network.
This is a complex situation as corrosion results from oxygen amounts that are introduced in the network, while the dark-colored mud is formed by corrosion products.
In actuality, within an extended network there are always slight leaks and losses, as well as clogs, particularly in fan coil applications, and result in a constant flow of fresh water entering the network from the automatic water filling system during cleaning and maintenance procedures.
Oxygen causes the formation of suspended solids whose circulation in the network leads to the reduction of the system’s efficiency, increased cleaning requirements, and thus lead to further losses in water, introduction of fresh water and oxygen in the system, and so on.
Method
Method of Corrosion Control: OxyFree System
OxyFree Oxygen Electrochemical Binding System
The OxyFree system removes oxygen and maintains the oxygen concentration levels lower than 0.1ppm, while at the same time it creates a powerful inhibitor with the method of electrolytic dissolution of the built-in aluminum cathode. The system is composed of an electronic control unit as well as a treatment tank in a compact arrangement. An incorporated pulse flowmeter is used for providing the control unit with consumption data, while the digital screen provides a full range of operating parameter indications. At the same time, a special electrode detects the presence of oxygen in the water and supplies with data the central unit which adjusts the operation parameters accordingly. The system is fully automated and requires only the replacement of the anode every two to three years. System monitoring is completed with the use of a specific electronic monitoring card which serves two purposes: it records the operation parameters of the system with the intent to monitor and control it, while it is also used for the automatic re-programming of the system in the event that it is deemed necessary.
Closed Loop Water Systems
Closed Loop Water Systems: Cooling - Heating
Installation – Outcome Guarantee
The implementation of the proposed design in conjunction with the extensive experience that SYCHEM S.A. has acquired on corrosion protection and water treatment systems (company list of design and construction projects is provided upon request) guarantees the active protection against corrosion of all the metal components in each installation.
SYCHEM S.A. offers a results-based warranty on the system, while system operation is also proved with measurements that are taken prior to and after the installation of the system, to confirm the reduction of oxygen concentration at levels lower than 0.1ppm (as per DIN specifications).
Brief Technical Description
The installation of an electrochemical oxygen binding OxyFree system in combination with a centrifugal filter forms the solution of the issue, without the need for addition of chemicals.
Centrifugal Filter
The centrifugal filter acts complementary on the electrochemical oxygen binding system. The installation of a centrifugal system with retention capabilities of up to 98% solids above 75μm is recommended for the removal of suspended solids and corrosion products, and for the preservation of water purity. The centrifugal filter has no maintenance requirements, while the solids removal is performed with a simple nozzle release on the lower part of the filter. A bypass is installed with 15% of the total volume of the network passing through this arrangement.
