Through these complex, industrial constructs, this high temperature is regulated quite efficiently and both the safety and efficiency of the industrial process are preserved. The recommendation is to replace the demineralizer resins if the conductivity exceeds 0.5S/cm or if the pressure differential across the deionizer exceeds 15 psid. Water systems help cool bearings, while other coolers chill lube, air compressors and oil. The pH of the water should also be tested regularly. The free-cooler allows the chiller to be turned off for a large part of the year. Visit our updated, This website requires certain cookies to work and uses other cookies to help you have the best experience. Alfa Laval ALF filters are self-cleaning and require virtually no maintenance. Make sure unit is level. A closed-loop cooling system is a cooling system that uses a liquid coolant (which can be water/water-based coolants or oil/oil-based coolants) to exchange heat from the industrial process in a closed-loop setup. Our comprehensive testing and treatments for closed loop systems, cooling towers, boilers and more can detect and resolve issues with ease and ensure industrial operations continue . This blog is written once per month by one of our technical sales managers. Deposits and partially plugged strands can reduce the water flow rate. Compressor (HP) 5 - 15; Cooling Capacity (refrigeration tons) 4.6 to 14.6; Single circuited systems; Large Size Water Cooled Chiller. In addition to leaks, bacteria or mineral deposits can reduce the ability of the system to transfer heat by coating the surfaces of the parts. These conditions can quickly deteriorate your system without you knowing until efficiency drops to detectable levels. On the other hand, closed-loop cooling systems that have leakageand which have significant water losscan be nearly impossible (and sometimes very expensive) to maintain at the proper treatment levels. In a previous article we discussed treatment options for stator cooling water in more detail (Forgotten Water: Stator Cooling Water Chemistry in the December 2007 issue of POWER). Closed-loop systems that use demineralized water makeup would tend to be on the lower end of this range. Closed-loop cooling systems can also be found in air coolers on the intakes of combustion turbines. BAC Australia' s Series 1500 FXV Closed Cooling Towers are a proven cost-effective method of cooling condenser water loops and industrial processes. Nonmetallic components, such as natural or synthetic rubber, asbestos, and carbon, are also used. The cooling loop removes heat from the stator bars and conveys it away through heat exchangers. For example, hollow strands for cooling water flow may be in the top right-hand corner of a stator bar on one end and come out somewhere in the middle of the stator bar on the other end. This can cause the copper oxide to be converted from one form (cupric) to the other (cuprous). At up to 170F (77C), the curves are essentially parallel. Industrial water chillers provide an immediate reduction in water use and consistent water temperatures, which in turn offer significant improvement to the process and a quick return on investment. The increased efficiency of a closed circuit system from proper water treatment ensures the generator has adequate cooling water and is always ready. Efficiency also increases in the winter when closed loop systems can operate dry, preventing freezing during the colder months. This means that your line of work may mandate the need for a specific tower type. Moreover, its what gives power plants their iconic look. This is a major problem in some of the worlds most efficient manufacturing plants and this is exactly what, are. As the name suggests, closed-loop HVAC systems are sealed units containing a fixed volume of water. However, the use of these products may result in foaming problems unless an anti-foam is used along with them. While closed loop heating or cooling costs more initially, over time, that cost gets offset by the savings from better efficiency in all conditions. If a freeze protection solution such asglycol is incorporated, freeze protection point and percentage glycol should be performed. Monitoring the water quality of your cooling or heating system may not be a task you have the experience or equipment to do yourself, though. block. By establishing baseline data as previously mentioned, a determination can be made with good assurance as to the exact process taking place; thereby allowing proper adjustments in the treatment of the systemto be made. An existing system, dirty due to negligence, can often be restored to an acceptable working condition that is relatively problem free with minimal effort and expense. Ironically, in closed-loop systems that are very tight, dissolved oxygen levels can drop, and thus minimize the effectiveness of a molybdate treatment (which requires dissolved oxygen to form a passive layer). Cooling tower systems have been used by industry for years to provide a means of removing waste heat generated by machinery or manufacturing processes. Consequently, there is less maintenance and less pumping both of which significantly reduce operating costs. Any level below 1 ppm should generate immediate action to correct the problem. -Water source heat units. Other closed-loop cooling systems can include chilled water systems for air chillers used at the air inlet to the gas turbines at a combined cycle power plant and the chemistry sample panel. They can be found in many industrial applications as well as refrigeration systems you may see atop supermarkets. (Hardline CPU Cooling Loop, CPU Water Block, D5 Pump/Reservoir Combo, Radiator, 3x RGB Fans, iCUE Software Control) White . In addition, their fouling-resistant design minimizes cleaning requirements. Alkaline pH treatment can improve either the low or highdissolved oxygen regime. . Closed loop systems do not have an opening to the air, but this does not mean the system has complete protection from foreign matter in the water. We stock many models of water chillers that are ready for quick delivery! They should also be designed to be anti-corrosive and resistant to all sorts of conditions and chemicals. While open systems need monitoring of water levels and watching for particulate matter from the environment, closed circuit systems need control of the waters chemistry. The value we have preset on the cooling unit is a sound compromise between cooling the inside of the enclosure and the accumulation of condensation. It also involves looking at a variety of related temperatures and pressures for trends that can predict an approaching problem. This is a major problem in some of the worlds most efficient manufacturing plants and this is exactly what industrial cooling systems are. Hot water from the condenser or other piece of equipment is sprayed on horizontal slats or corrugated PVC fill-packs. Nitrites are utilized by some bacteria as an energy source. Increasing the pH of the stator cooling water also has been shown to be very effective at reducing copper corrosion and release rates. Closed Loop Chillers come complete with an Installation Kit and Glycol for Start up. Treating the water to prevent corrosion and freezing is part of maintaining these systems. A closed circuit system keeps the water completely enclosed inside pipes, preserving water volume and quality. A major consideration when considering mechanical. Visit our privacy Depending on the type of closed system and the various factors of State/Federal laws limiting the use of chromate, a nonchromate alternative may be needed. Various microbes will produce acidic by-products that will suppress pH and increase corrosion. Heat, absorbed by the water in the closed system, is normally transferred by a water-to-water exchanger to the recirculating water of an open recirculating system, from which the heat is lost to atmosphere (Figure 32-1). Closed recirculating systems have many advantages. There may be multiple closed-loop cooling systems at your power plant. The flexibility to adjust to cooling and energy needs makes closed loop systems more energy efficient. Key to keeping your closed-loop system functioning properly is regular monitoring. Available on demand until February 16, 2024. David Daniels ([emailprotected]) is a frequent contributor to POWER and senior principal scientist at M&M Engineering Associates Inc. Closed loop systems are more efficient than open systems. Cartridge filters that are normally supplied are 5m, and some plants have found that moving to a 1m cartridge filter is helpful. Efficient removal of heat is an economic requirement in the design and operation of a cooling system. help you have the best experience while on the site. The problem is the release of the copper oxides from one area that collect in another. ok. Work produces heat, which means that too much work produces too much heat. Closed cooling water system To cool key processes in petrochemical plants, refineries, power plants and other heavy-duty industrial environments, many plant owners and operators rely on closed-loop cooling as the preferred cooling method. Depending on the pressure of the closed-loop versus open-loop system at this point, the bearing cooling water may leak out, or the open cooling water may leak in. When high nitrite levels are applied, acid feed may be required for pH control. Closed loop water treatment is essential for many industrial emergency systems that rely on cooling water. Borates protect closed-loop systems in three ways: Corrosion inhibition, buffering, and cleaning. Due to the lower maintenance requirements of a closed system, this type may have a lower price over time than a higher maintenance open circuit system. Coolant . Chilled water systems (air chillers) exchange heat with the compressor, which in turn uses a cooling tower to throw heat back into the environment. Another problem is encountered when chromate inhibitors are used in cooling systems serving compressors that handle sour gas. In a closed-loop system, oxygen pitting is the most common type of corrosion (Figure 1). For more information about our water treatment and system maintenance, contact us today. Compared to other technologies such as stand-alone cooling towers, closed-loop cooling with plate heat exchangers requires less make-up water and minimal water treatment. In the end, its important to point out that without these cooling systems there is no heavy industry (or industry of any kind). With 20 years of water treatment experience, including a wide range of troubleshooting and service in potable water and non-potable HVAC and industrial applications, he is an expert in water treatment chemistry for cooling towers, boilers, and closed-loop systems. Experience has taught us no two industrial cooling water systems are alike. The copper coils contain hollow strands in the stator bar through which the cooling water travels (Figure 3). With decades of experience selling water chillers, Industrial Water Chiller (a division of T. J.