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Chapter 124 : Design and Realization of Zero-Aerosol Cooling Towers
The cooling towers gather together many factors for bacteria proliferation and possible transmission to human beings. To eliminate dissemination in the atmosphere, the objective of the presented new system is to eliminate the vectorization of bacteria by eliminating the aerosol production and dispersion from cooling towers. A review of the published techniques of aerosol size measurement has been carried out. The most suitable technique is an optical technique relevant to flow and able to accurately determine particle size distributions, number density, and total mass. The aerosol spectrometer principle is based on the diffraction of white light. The first measurements have been realized at the air exit and at 10 cm and 20 cm above the air exit of the cooling tower. Other measurements have been performed to identify the influence of the ventilation velocity in a cooling tower. Additional measurements have been realized with and without the drift eliminators on the same cooling tower and for the same climatic conditions. The measurements done on cooling towers and the modeling of countercurrent flow show that efforts must be concentrated on water distribution and on water recovery. A new concept has been developed by the CEP and Climespace, patented to eliminate aerosol production and any direct crossing of air flow and water flow.