Open loop cooling towers absorb large volumes of airborne particulate matter, acting as an air scrubber filtering the surrounding air, which enter the water stream. Over time, these fine particles accumulate and settle within the system, adversely affecting cooling performance while reducing the life of components. Typically, 85% of suspended solids in cooling water are smaller than 5 microns in size. Studies show that fine particles (< 5 microns) in cooling water will attract organic compounds and minerals that cause fouling of the cooling tower water, chilled water and heat exchangers. Suspended particles in circulating water significantly reduce cooling system efficiency.
Why a Side Stream Filter Matters
Side stream filtration intercepts usually less than 10% of the total circulating water stream, though the total water volume is filtered each day, or perhaps several times per day depending on the size of the cooling system and type of filter. HydroTech recommends the use of a side stream filter for cooling towers to remove unwanted build-up, reduce biological growth that could support legionella growth, and other debris and particles that adversely affect a cooling loop and its components (heat exchangers, chillers and more).
HydroFLOW Improves Filtration
HydroFLOW physical water conditioning causes dissolved calcium and minerals to precipitate in the water stream. The pulsed frequency extends throughout the entire water system and suspended particles cluster which makes filtration much more efficient. The particle clusters contain suspended calcium, dirt, debris, biofilm, and airborne items that enter the cooling tower. HydroFLOW causes clustered particles to be easily removed with a side stream filter, which reduces maintenance and operating costs. Daily operating costs relating to chemicals, water use and energy are reduced due to the improved water quality.
HydroFLOW prevents scale accumulation and cleaner components, resulting in improved heat-transfer efficiencies and reduced energy costs. The particles that HydroFLOW causes to precipitate, and the suspended particles that enter the water stream through the cooling tower intake are clustered and removed by a side stream filter.
Cost Savings with Short Term ROI and Long Term CapEX Reduction
A cleaner water system requires less energy, water and chemicals to maintain optimum operating efficiency, and performing as originally designed. Reduced Operating Costs also improve longer term Capital Budgets due to prevention of scale, biofilm and corrosion, with fewer maintenance and repair events.
HydroFLOW physical water conditioning and Side Stream Filtration reduce water consumption, maintenance costs and chemical consumption. A cleaner cooling system has improved heat-transfer efficiencies and reduced energy costs. The Return On Investment for HydroFLOW with Side Stream Filtration is usually less than 24 months.