Cooling tower plume abatement: combining turbulent plume theory and psychrometrics

冷却塔产生的可见羽流对空中和地面运输行业构成危险 附近的居民常常对它不太满意，因为他们把冷凝的蒸汽与更有害的 化学废液的混合物。已经开发了羽流消减策略，其将热湿空气与 然而，由于较少的热干燥空气量，这些设计往往安装和操作昂贵， 因此在实践中未得到充分利用。为了改进现有的烟羽消减模型，我们建议 联合收割机（空气-蒸汽混合物的热力学研究）与紊流羽流理论相结合 在规定的操作和大气条件下，确定最佳混合比。特别注意 将考虑到环境分层和“大气逆温层”的可能性，沿沿着， 由冷却塔排出的污水可能会积聚。 虽然我们的分析研究将利用现有的理论，这些将以一种新颖的方式结合起来。使用 湍流羽流理论在这方面特别重要：它提供了有效的参数化， 湍流混合，避免了复杂性，数值和其他解决全范围的湍流 动议 该项目将在国际冷却塔行业专家的指导下完成。它将 为研究生提供有关冷却塔设计，热力学和 环境流体动力学，并将包括作为其主要交付的计算机算法，可以 用于今后的工程设计计算。

The visible plumes generated by cooling towers pose dangers to the air and ground transportation industries and are often viewed unfavorably by nearby residents who associate condensing steam with a more noxious melange of chemical effluents. Plume abatement strategies have been developed that mix hot moist air with lesser volumes of hot dry air, however, these designs tend to be expensive to install and operate and are therefore underutilized in practice. So as to improve upon existing models for plume abatement, we propose to combine psychrometrics (the study of the thermodynamics of air-steam mixtures) with turbulent plume theory in identifying, for prescribed operating and atmospheric conditions, optimal mixing ratios. Special attention will be given to ambient stratification and the possibility of an "atmospheric inversion layer" along which effluent discharged from the cooling tower might accumulate. Although our analytical study will leverage existing theories, these will be combined in a novel way. The use of turbulent plume theory is especially significant in this respect: it provides well-validated parameterizations of turbulent mixing that avoid the complications, numerical and otherwise, of resolving a full range of turbulent motions. This project will be completed with guidance from industry experts at International Cooling Tower. It will provide detailed training to a graduate student on topics related to cooling tower design, thermodynamics and environmental fluid dynamics and will include as its major deliverable a computer algorithm that can be applied in future engineering design calculations.