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System design
Filling
Filling the system should be done from the lowest point so that air can be pressed out at the highest point. HYCOOL that stands in open and partially filled systems begins to produce crystals in contact with air. This can be seen as a coloured coating on the inside of copper pipes. At filling or service it is important not to expose the part of the system that is not completely full to air for any lengthy period of time. HYCOOL is delivered from the factory ready for filling and should not be mixed with water.
Retrofitting
When replacing any other secondary refrigerant in an existing system with HYCOOL, it is very important that the system be cleaned and flushed well, and drained before filling with HYCOOL. HYCOOL must not be mixed with other chemicals, as there is a risk of the original concentrations of the system's chemical components being altered and quality requirements not being satisfied.
Deaeration
When the system has been filled, it must be completely deaerated by, for example, automatic or manual deaerators on top of the highest points in the system, active deaerators mounted in the system at points with the highest temperatures, or degassing equipment by use of a vacuum which degasses the liquid so that it maintains a low oxygen content. Circulate the system before decooling to working temperature. Deaeration of the circulating system is of great importance in all contexts, as oxygen is a contributory cause of problems and corrosion, also influencing inhibitors.
Control
After filling with HYCOOL, ensure that the density meets the specification for the freezing point. Depending on operating conditions, the inhibitors are expected to work effectively over a long period.
They should however be checked regularly.
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Pressure drop and flow velocity
When designing and dimensioning indirect cooling systems with HYCOOL, it is important to understand its thermodynamic properties, which are also available in software format for your information.
HYCOOLs Pipe Calculation Program provides a basic overview of pressure drops in the most common pipe sizes for copper, steel, plastic and stainless steel. Ensure the correct thermodynamic data is used for calculations when calculating pressure drops with other software programs. HYCOOL has proven to be very good at heat transfer because of its high thermal conductivity and low viscosity. These factors should be taken into account when calculating heat exchangers and pipe systems, as HYCOOL shows turbulent flow (high Reynolds number) even at low flow velocity and good heat transfer. Calculate the heat exchanger and pipe systems so that the risks of turbulence problems are eliminated.
Backup
Addcon Nordic AS, as manufacturer and supplier of HYCOOL, can offer technical backup, support and chemical analyses of the product.
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