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首页> 外文会议>Cooling technology institute annual conference >COST/PERFORMANCE TRADEOFFS AMONG WET, DRY AND HYBRID COOLING SYSTEMS
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COST/PERFORMANCE TRADEOFFS AMONG WET, DRY AND HYBRID COOLING SYSTEMS

机译：湿式，干式和混合冷却系统之间的成本/性能平衡

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The needs for increasing amounts of electric power and for conserving locally limited fresh water supply can sometimes come into conflict. Since power plant cooling is the major use of water in most plants, it is the choice of cooling system that frequently mediates this conflict. Traditional wet-cooling systems have good efficiency and low cost but high water consumption; dry cooling virtually eliminates water consumption but at higher cost and reduced efficiency. Hybrid, wet/dry cooling systems enable significant water savings, albeit at higher cost, in comparison to wet cooling and provide improved plant efficiency and output at frequently lower cost in comparison to all-dry systems. This paper presents quantified tradeoffs among wet, dry and hybrid cooling systems for typical gas-fired, combined-cycle plants operating in a range of ambient conditions characteristic of the State of California in the US. The study uses an Excel spreadsheet-based computational tool to specify, at an "engineering-level", design parameters for optimized closed-cycle wet, direct dry and parallel wet/dry hybrid cooling systems. The results are validated with thermal performance and water consumption data from operating plants equipped with wet, dry and hybrid cooling systems. The tool is then used to establish the tradeoffs among the alternative cooling systems at five sites in California. The results will be used to estimate the economic and water availability benefits enabled by the selection of preferred cooling systems for future power development in California.
机译：有时增加电力需求和保持当地有限的淡水供应的需求可能会发生冲突。由于发电厂的冷却是大多数发电厂中水的主要用途，因此选择冷却系统经常可以解决这种冲突。传统的湿式冷却系统效率高，成本低，耗水量大。干式冷却实际上消除了水消耗，但成本更高且效率降低。与湿式冷却相比，湿式/干式混合冷却系统可节省大量的水，尽管成本较高，并且与全干式系统相比，通常以较低的成本提供了更高的工厂效率和产量。本文介绍了在美国加利福尼亚州特有的一系列环境条件下运行的典型燃气，联合循环电厂在湿式，干式和混合式冷却系统之间的定量权衡。该研究使用基于Excel电子表格的计算工具在“工程水平”上指定优化的闭环湿式，直接干式和并行湿/干混合冷却系统的设计参数。所得结果已通过装有湿式，干式和混合式冷却系统的运营工厂的热力性能和耗水量数据进行验证。然后，使用该工具在加利福尼亚州五个站点的替代冷却系统之间建立折衷方案。结果将用于估算为加利福尼亚未来的电力开发选择首选冷却系统所带来的经济和水利收益。

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