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Effects of Wind on Air-Cooled Condenser Performance |
John S. Maulbetsch, Maulbetsch Consulting and Michael N. DiFilippo - Consultant |
2007 |
| Abstract: Wind is an important factor affecting the performance of air-cooled condensers. The paper presents the results of field tests at five plants with ACC's to determine the mechanism and magnitude of the effects. The relative importance of recirculation and degradation of fan performance is discussed. Possible approaches to mitigate the wind effect are explored. |
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Evaporative Pre-coolers for Air Cooled Heat Exchangers |
Matt Smith, L.S. Enterprises; Rich Aull, Brentwood Industries; Robert Giammaruti, Hudson Products Corporation |
2006 |
| Abstract: Evaporative pre-cooling of air cooled heat exchangers provides the thermodynamic advantages of water cooling towers with the reduced maintenance requirements of air cooled heat exchangers. In areas where water conservation, cooling tower plume abatement, or water discharge permits are a problem, evaporative pre-cooling of the air going to the heat exchanger can be the solution. This paper discusses the advantages of pre-coolers and presents some basic design considerations. |
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Enhancement of Air Cooled Condenser Operation in Power Plants |
Ram Chandran, Holtec International |
2006 |
| Abstract: Use of Air Cooled Condensing system, to condense turbine exhaust steam from the steam cycle of combined cycle plants, coal fired plants and various other plants using steam to generate electricity, has gained acceptance. However, as electricity generation is privatized, building plants at low cost has been the priority rather than the performance. This paper discusses the impact of velocity consideration in the design of air cooled condensers. The velocity at design point and the change in velocity affect the steam duct design and the tube bundle design. As the ambient temperature varies, it affects and/or limits the range of turbine operation. This, in turn, can improve or adversely affect the plant electric power output. The velocity also has an effect on the condensate temperature. The reheat of the condensate requires energy which is redirected from generating capacity which is often ignored. |
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Pressure Recovery Effects in Air-Cooled Installations |
Henk van der Spek, Howden Cooling Fans |
2005 |
| Abstract: Pressure recovery is an effect that occurs in gas and liquid flows. It concerns the conversion from both the speed of the fluid into pressure and into the inverse direction under ideal conditions. In fact, it is the consequence of one of the most fundamental physical laws (i.e. the law of conservation of energy). Although an air-cooled heat exchanger, the velocity of the air varies many times, pressure recovery effects have been hardly recognized up to now. This report aims to discuss the effects on air-cooled heat exchangers and the further impact of it on the dimensioning of axial air flow fans for those air-cooled heat exchangers. |
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Why Every Air Cooled Steam Condenser Needs A Cooling Tower |
Dr. Luc DeBacker and William M. Wurtz, Hamon Dry Cooling |
2003 |
| Abstract: This technical paper will review the basic types of cooling systems utilized by utility power plants, and explain the reasons why it is advantageous to include a cooling tower in many dry cooling applications. A system where a cooling tower is used in conjunction with an air-cooled steam condenser is called a parallel condensing system. This type of system utilizes three traditional types of heat exchangers: a cooling tower, an air-cooled steam condenser and a surface condenser. An optimized parallel condensing system reduces both investment costs and operational costs while using a minimum amount of water. |
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The New Wet/Dry Cooling Tower Without Finned Tube Dry Section (NWD) |
Toshio Miura, Osamu Gotoh, Ishikawajima Plant Engr & Const Co., Ltd. |
1998 |
| Abstract: NWD uses the multi purpose fill, which is consisted of all wet and wet/dry lanes. During the summer season, NWD can be used as all wet cooling tower by using wet/dry lanes as wet sections, and during plume abatement (winter) season, NWD can be used as wet/dry cooling tower by using wet/dry lanes as dry sections which are acting similar to finned tube dry sections. The design criteria of NWD had been established by the experiment and a prototype NWD was installed to confirm the result of the experiment and no plume was visible at the fan stack exit. |
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Integrated Wet/Dry Cooling and Plume Abatement With The Binary Cooling Tower (TP-21A) |
William G. Sanderson & Richard G. Lancaster, Tower Systems, Inc. |
1983 |
| Abstract: State-of-the-art wet/dry plume abatement cooling towers are often considered, but seldom purchased primarily because of high overall costs. The BCT, with it unique operating flexibility, can be configured as a plume abatement-cooling tower with zero feasible plumes under all operating conditions. This paper reviews the wet/dry operations of the BCT. |
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The Supplemental Use of Dry Surface in a Cooling Tower System (TP-65A) |
J.R. Buss & P.L. Tremont, Monsanto Company |
1969 |
| Abstract: |
