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Becht Engineering Blog

In this section of the site contributing authors submit interesting articles relating to the various services, industries and research & development efforts of Becht Engineering.

Cooling Towers: Benefits of a Cold Eyes Review

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One key decision that often needs to be made is repair vs. replace. When has a cooling tower arrived at the point where a new tower should be considered? Maintenance costs, overall tower condition, environmental constraints, and performance optimization are all factors that need to be evaluated. If a new cooling tower is justified, how are the specifications for performance selected? What range, fan horsepower, approach to wet bulb, and water flow rate should be specified to best match plant requirements? The range is the difference between the hot water (return) temperature and the cold water (supply) temperature. The approach to wet bulb is due to the fact that, if the cooling tower were infinite in size, the cold water temperature would be at the wet bulb temperature. However, just like a shell and tube heat exchanger with a temperature difference between two streams, a finite cooling tower results in some...
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Cooling Water Systems - 4 Good Reasons Why A Cold Eyes Review Could Be Essential

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An independent (3 rd party) assessment of your Cooling Water System by a Becht SME is highly recommended. There are several key Business Objectives that are addressed by this type of review. 1.  Is There a Plan In Place To Insure Equipment Is Not On The Verge Of Catastrophic Failure?  There are many documented instances of Cooling Towers collapsing from biological (fungal) attack on wood members or excessive weight due to ice, scale, or mud. Fiberglas towers have failed due to improper erection techniques. Frequent inspections are necessary to detect and avoid these conditions. Underground piping may corrode and cathodic protection systems may no longer provide adequate protection. Two common modes of failure on heat exchangers are pitting or stress corrosion cracking (SCC). In this last case, (failure by SCC), Becht worked with a client to retrofit the heat exchanger in place to insure that SCC would not re-occur.   2.  Have...
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