What is the minimum flow rate a variable speed pump can provide without damage to the pump? This is a question every engineer should ask... READ MORE
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New water-saving and energy-saving cooling tower designs come with concerns about change. From the owner to the engineer to the contractor, the question becomes, “Why... READ MORE
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The combination of water usage and energy usage in open loop cooling towers are a significant cost to owners. Owners are faced with tremendous water... READ MORE
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The combination of water usage and energy usage in open-loop cooling towers is a significant cost to owners. There are ways to reduce the waste... READ MORE
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The weather is warming, and our attention turns away from heating and toward system air conditioning. To protect the cooling tower pumps, we offer a... READ MORE
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Many air-cooled chillers do not have glycol and are drained for the winter season. Most cooling towers are also drained for our cold winter months.... READ MORE
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Today’s building owner’s have many opportunities to improve water use efficiency. ASHRAE Standard 189.1 identifies a few areas to focus on reducing water use specific to cooling towers. The last four issues of Deppmann’s Monday Morning Minutes has discussed specific strategies to improve water use efficiency using current Cooling Tower and Advanced Water Treatment technology advancements in design. [Read more…]... READ MORE
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Most new chillers can now handle variable flow through the condenser providing many opportunities for operational savings. As the cooling tower is an integral part of this system, it is important to understand the effect of flow rate changes and how to insure your cooling tower can provide optimal savings while operating [Read more…]... READ MORE
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In this issue, we will discuss the changing requirements specific to “cycles of concentration” in cooling tower applications. In addition, we will review the effect of increasing cycles of concentration and provide solutions to improving these results. ASHRAE Standard 90.1-2010 code change effective 10.18.2013 states [Read more…]... READ MORE
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In this issue, we will discuss blow down and cycles of concentration. In addition to water emissions caused by evaporation and drift, cooling towers require blow-down to control the levels of dissolved minerals re-circulated in the cooling tower. These losses are offset or balanced by make up water to both maintain the level of water in the tower and more importantly, [Read more…]... READ MORE
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