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Emerson Introduces New Cooling Tower Monitoring solution

Source: www.gulfoilandgas.com 10/21/2013, Location: North America

Emerson Process Management has introduced an integrated Cooling Tower Monitoring solution as the latest addition to its Essential Asset Monitoring capabilities.

The new Cooling Tower solution monitors the water cycle of the cooling tower that services process plants, helping operators ensure that makeup water and chemical costs are optimized while minimizing scaling and fouling of cooling water exchangers facility-wide. The solution provides a complete set of pre-engineered applications for 24/7 online monitoring and analysis of the cooling tower and its related equipment health. It uses wireless instrument networks with existing wired instruments to provide affordable, easy-to-implement, automatic monitoring.

Cooling water quality and availability is critical for maintaining production at most operating facilities. Process plants and refineries circulate thousands of gallons of water through cooling water systems. Plants in hot climates are particularly susceptible to cooling-limited conditions during summer months. Conversely, plants in cold climates are concerned with equipment freezing and damaging cooling tower internals. Poor water quality can lead to rapid fouling in the entire heat exchanger network, reducing cooling effectiveness, potentially limiting production, and requiring additional maintenance services and outages for cleaning.

A problem with a cooling water pump or a fan failure forces operators to react to an immediate loss of cooling capacity. Even if a plant shutdown is not required, interruption in cooling water supply can cause pressure relief valve releases and require temporary reductions in throughput, resulting in underutilization of the plant assets.

Since chemicals, additives and fresh water treatment are some of the largest variable costs for cooling tower operation, optimizing purge and makeup rates is important. Proper control of water cycles and chemicals to maintain water quality requires on-line measurement of water quality. Many plants operate based on daily or even weekly analysis of their cooling water. On-line monitoring of cooling water quality can result in lower makeup water and chemical costs, as well as elimination of fouling events in the exchanger circuit.

“To confront common challenges of operating cooling towers, Emerson has developed a new essential asset monitoring module that analyzes process and equipment data to determine an overall cooling tower health indicator and generate alerts when something abnormal is detected,” commented Pete Sharpe, director of applications development for Emerson. “Cooling tower equipment is located in wet, slippery environments, so it is not the ideal location to send maintenance technicians out with a handheld to take manual measurements. By installing wireless monitoring devices on their cooling tower fans, customers can eliminate manual rounds -- increasing worker safety, saving time, and freeing technicians for higher level tasks. Further, continuous monitoring delivers alerts that enable planned maintenance which is quicker and more cost effective than reaction to failures.”

“All told,” said Sharpe, “we estimate that on-line monitoring and analysis of a large 350,000 gpm cooling water system can add up to $450,000 in savings annually due to reductions in lost production, lower energy bills, and a reduced chemical and water usage.”

The new Cooling Tower Monitoring release adds to the growing family of Essential Asset Monitoring solutions which include monitoring solutions for pumps, blowers, compressors, and heat exchangers, with other asset types under development. The Essential Asset Monitoring solution from Emerson includes the software and any new devices required and commissioning services.

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