Because the rotating brush or tool rotates at high speed, friction is created in the tube. A small amount of water is added to flush the loosened deposits out of the tubes. This will cause the cleaning brush or tool to rotate in the tube. The tube cleaning machine is powered by electricity or compressed air and then powers the flexible shaft. The cleaning always consists of 3 parts: (1) tube cleaning machine, (2) flexible shaft, (3) cleaning brush or tool. Tube cleaning with brushes is a relatively simple technique. Check out the cooling tower cleaning page here, or contact our experts. Goodway Benelux offers various solutions for the cleaning of cooling towers. If it is fouled, this will have a direct influence on the level of fouling within the condenser tubes of the chiller. In the case of a water-cooled chiller that is connected to an open cooling tower, it is also wise to look at the condition of the cooling tower. Think of products from well-known suppliers and manufacturers, such as: Trane, York, Carrier, McQuay, etc. In most cases, the equipment is used to clean tubes between 7 and 28 millimeters. This technique is most effective for light to medium types of deposits, such as algae, sludge, mud, biological deposits and light scale. Tube cleaning with rotating brushes/tools is mainly used for smaller tube heat exchangers, such as water-cooled chillers. In this case it may be better to opt for a chemical cleaning by means of the cleaning-in-place (CIP) technique. If the (scale) deposit is very hard, a rotary tube cleaning may not be sufficient to fully remove the deposits. Depending on the type and degree of fouling, different types of brushes/tools can be used. The most common types of deposits in shell and tube heat exchangers are: algae, mud, sludge, bio-fouling (biofilm), rust and limescale. ![]() In addition, connected systems, such as compressors and pumps, will need to work harder when tubes are fouled and dirty, adding to operating costs and wear and tear to those items. Shortened lifetime: fouled tubes with biological deposits and scaling can lead to under deposit corrosion, which shortens the lifetime of the tubes.As a result, energy consumption will rise (significantly). Higher energy consumption: in order to continue to achieve the same efficiency level, connected compressors and pumps will have to run harder. ![]() This reduces the efficiency of the heat exchanger. Reduced efficiency: because the surface of the tubes is fouled, heat transfer between the 2 media becomes more difficult.The most common problems due to fouled tubes are: ![]() This is because fouling has an insulating effect, and therefore reduces the heat transfer between the 2 media. Depending on the type of deposit, the heat transfer can be (drastically) reduced. Because the water contains particles and deposits, the tubes will become fouled over time. In the case of water-cooled chillers, this water often comes from a cooling tower. Tubular heat exchangers, also known as shell and tube exchangers, have many small tubes through which a liquid flows. ![]()
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