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首页> 外文期刊>CTI Journal >Extending The Life of Reinforced Concrete Cooling Towers
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Extending The Life of Reinforced Concrete Cooling Towers

机译：延长钢筋混凝土冷却塔的寿命

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摘要

Reinforced Concrete Cooling Towers are a mainstay of industries that require the cooling of systems and process water.The environment these cooling towers see varies widely from forced-air cooling towers for mineral water to natural draft cooling towers for brackish water.All these environments can have a detrimental effect on the condition and longevity of the reinforced concrete.This presentation will look at options for repairing and extending the life of these reinforced concrete cooling towers.The topic will be explored using two case studies;Coal Creek Station in North Dakota using structural concrete repair， waterproofing， beam replacement， and protective coatings;and a Mid-Atlantic Generating Station with a variety of impressed current and galvanic cathodic protection systems.Each repair and restoration is expected to extend the life of the cooling tower in excess of 25 years.Cooling Towers Cooling tower are used to cool process water for industrial facilities.The two cooling towers we are discussing in this paper are very different in design and process.The Mid-Atlantic Cooling Tower is a reinforced concrete hyperbolic shell natural draft cooling tower.The tower is the main component of a closed-cycle water cooling system， in which the process water is sourced from the nearby brackish river.The hot water is sprayed into a basin at the base of tower to cool it.The steam(hot moist air)raises via convection， through a filter bed and out the top of the tower.The Coal Creek Station Cooling Tower is a mechanical draft cooling tower.Three mechanical draft cooling towers operate at the power-station， each 42’high and 225’in diameter， equipped with eight 28’diameter fans.Hot water from the plant is introduced to the top of the tower and is cooled by a counter-flow of air drawn from below.The water is finally collected in the cool water basin at the base of the cooling tower.The cooling water basin and the interior beams and columns are built with cast-in-place reinforced concrete and the elevated hot water basin is constructed with precast concrete elements.
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