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Natural Draft Towers
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Order Number
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Title
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Author
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Date
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Natural Draft Cooling Towers (TP-38A)
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W.J. Jones, Hamon-Cottrell, Inc.
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1968
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Abstract:
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Thermal Performance Evaluation of The Natural Draft Cooling Tower (TP-83A)
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John C. Campbell, Ceramic Cooling Tower Company
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1970
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Abstract:
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Oriented Spray-Assisted Cooling Tower
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Charles F. Bowman, Chuck Bowman Assc., Inc. Dudley J. Benton, Ph.D., Environmental
Consulting Engineers, Inc.
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1996
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Abstract:
Although the thermal performances of natural draft cooling
towers occasionally fail to meet expectations, the options
available to the designer to improve the performance of these
cooling towers are limited. This paper presents the technical
basis for a new Oriented Spray-assisted Cooling Tower design
developed by the authors while employed by the Tennessee Valley
Authority (TVA). This design which may be back-fitted to
existing natural draft cooling towers reduces the water loading
and increases the air flow, resulting in a significant
improvement in overall thermal performance. The paper will
present the results of case studies conducted for existing TVA
natural draft cooling towers and will show how the improvement
in performance is achieved.
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Upgrading and Repacking Two 460 MW Natural Draft Cooling Towers
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Peter Bosman, Knight Piesold Energy LLC, Dave Stables, Knight Piesold (PTY) LTD
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1998
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Abstract:
This paper discusses the upgrading and repacking of two ND
cooling towers at Hwange Power Station in Zimbabwe. The work
involved replacing the badly blocked asbestos cement film pack
with a high performance stainless steel splash/trickle pack
while maintaining both towers in operation. The repack not only
restored tower performance, recooled temperature was
approximately 18°F worse than original design, but also
improved recooled temperature by a further 3.6°F.
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On-Line Performance Monitoring of the Natural Draft Cooling Tower at Cardinal Plant
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Frank L. Michell, Mathew J. Miller, American Electric Power
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1998
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Abstract:
The paper will provide an over view of the online performance
monitoring system recently installed on the 630 MW coal fired
Unit 3 at Cardinal Plant in Brilliant, Ohio. Experience with
using the on-line monitor to optimize performance of the major
circulating water system components including the pumps,
condensers and cooling tower will be evaluated and presented in
the paper.
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Structural Modeling and Analysis of Natural-Draft Cooling Towers
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Leandro Etcheverry and Prasad Samarajiva, Walter P. Moore
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2009
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Abstract:
Advance finite element modeling and analysis can be useful to determine wind load capacity of natural-draft cooling towers. Because of the aggressive process and environmental exposure conditions, natural-draft cooling can sustain significant deterioration. This deterioration can be quantified and qualified by conducting a condition assessment. The findings from the assessment can be incorporated into the finite element model to determine wind load capacity not only of the as-designed structure but of the structure in its existing condition as well. The modeling and analysis is complex due to the geometry of the veil and the associated wind loads. As part of the analysis, wind loads are increased until the established failure criteria (stress or deflection) is reached. The results of the wind load analysis can be useful to plant owners in assessing the risks associated with the existing condition of the natural-draft cooling tower structure.
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