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A Systematic Approach Linking Condenser Performance to Heat Rate and CO{sub}2 Emissions

机译:将冷凝器性能与热效率和CO {sub} 2排放联系起来的系统方法

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摘要

Power plant condenser cooling systems play a vital role in maintaining generation efficiency and plant heat rate. Deposition in the condenser or cooling tower fill will increase turbine backpressure and require higher steam flow to maintain power. Higher steam flow will require more fuel to be burned, assuming the boiler system has the capability to generate more steam. In some cases, the plant cannot generate at full power with a fouled condenser the result of which is de-rating. The increased fuel requirement increases plant heat rate, which translates directly to fuel cost and emissions. Even though the increase in fuel consumption may be small (< 1%), the environmental and financial impacts may be significant, as emission-trading schemes (cap-and-trade) for greenhouse gasses are directly affected. Condenser and cooling tower performance-monitoring helps to link cooling system performance to heat rate and can be expressed in terms of environmental performance and compliance. Condenser cooling operating variables can be combined with cooling system chemistry performance as well as control data and engineering calculations to help document the impact of cooling system performance on heat rate, fuel consumption and emissions of greenhouse gases. The lowest environmental impact can thus be achieved from existing plant equipment.
机译:发电厂冷凝器冷却系统在维持发电效率和发电厂热效率方面发挥着至关重要的作用。冷凝器或冷却塔填料中的沉积物会增加涡轮的背压,并需要更高的蒸汽流量来维持功率。假设锅炉系统具有产生更多蒸汽的能力,则更高的蒸汽流量将需要燃烧更多的燃料。在某些情况下,工厂无法利用结垢的冷凝器以全功率发电,其结果是降额。燃料需求的增加增加了工厂的热效率,这直接转化为燃料成本和排放。即使燃料消耗的增加可能很小(<1%),但由于直接影响温室气体的排放交易计划(总量控制和交易),因此对环境和财务的影响可能很大。冷凝器和冷却塔的性能监控有助于将冷却系统的性能与发热量联系起来,并可以用环境性能和合规性表示。冷凝器的冷却操作变量可以与冷却系统的化学性能以及控制数据和工程计算相结合,以帮助记录冷却系统性能对热量,燃料消耗和温室气体排放的影响。因此,可以通过现有的工厂设备实现最低的环境影响。

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