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Chapter 124 : Design and Realization of Zero-Aerosol Cooling Towers

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Design and Realization of Zero-Aerosol Cooling Towers, Page 1 of 2

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Abstract:

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.

Citation: Clodic D, Zoughaib A, Maatouk C, Senejean B, Merchat M. 2006. Design and Realization of Zero-Aerosol Cooling Towers, p 513-518. In Cianciotto N, Kwaik Y, Edelstein P, Fields B, Geary D, Harrison T, Joseph C, Ratcliff R, Stout J, Swanson M (ed), . ASM Press, Washington, DC. doi: 10.1128/9781555815660.ch124

Key Concept Ranking

Surface Water
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Water
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Air
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Figures

Image of FIGURE 1
FIGURE 1

Drift eliminator impact.

Citation: Clodic D, Zoughaib A, Maatouk C, Senejean B, Merchat M. 2006. Design and Realization of Zero-Aerosol Cooling Towers, p 513-518. In Cianciotto N, Kwaik Y, Edelstein P, Fields B, Geary D, Harrison T, Joseph C, Ratcliff R, Stout J, Swanson M (ed), . ASM Press, Washington, DC. doi: 10.1128/9781555815660.ch124
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Image of FIGURE 2
FIGURE 2

Measurement of drift as a function of fan speed.

Citation: Clodic D, Zoughaib A, Maatouk C, Senejean B, Merchat M. 2006. Design and Realization of Zero-Aerosol Cooling Towers, p 513-518. In Cianciotto N, Kwaik Y, Edelstein P, Fields B, Geary D, Harrison T, Joseph C, Ratcliff R, Stout J, Swanson M (ed), . ASM Press, Washington, DC. doi: 10.1128/9781555815660.ch124
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Image of FIGURE 3
FIGURE 3

Comparison of aerosol drift on a classical cooling tower and on prototype.

Citation: Clodic D, Zoughaib A, Maatouk C, Senejean B, Merchat M. 2006. Design and Realization of Zero-Aerosol Cooling Towers, p 513-518. In Cianciotto N, Kwaik Y, Edelstein P, Fields B, Geary D, Harrison T, Joseph C, Ratcliff R, Stout J, Swanson M (ed), . ASM Press, Washington, DC. doi: 10.1128/9781555815660.ch124
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Download as Powerpoint

References

/content/book/10.1128/9781555815660.ch124
1. 2004. AHSRAE Handbook. HVAC Systems and Equipment.
2. Clodic D.,, A. Zoughaib,, M. Merchat, and, L. Fassi. 2004. Procédé et système d’alimentation en eau de tours aéroréfrigérantes. French patent 04/51128 filed on June 8, 2004, and its PCT extension FR/PCT2005/050398.
3. Dib, J.,, C. Maatouk,, A. Zoughaib, and, D. Clodic. 2004. Etude et Conception Globale de Tours de Refroidissement sans Panache et à Entraînement de Gouttelettes Limité. Report for ADEME and Climespace.
4. Durst, F., and, H. Umhauer. 1975. Local measurements of particle velocity, size distribution and concentration with a combined laser-Doppler particle sizing system. In Proceedings of the LDA Symposium, Copenhagen, p. 430456.
5. Holowach, M. J.,, L. E. Hochreiter, and, F. B. Cheung. 2002. A model for droplet entrainment in heated annular flow. Int. J. Heat Fluid Flow 23:807822.
6. Mizutani, Y.,, H. Kodama, and, K. Miyasaka. 1982. Doppler-Mie combination technique for determination of size velocity correlation of spray droplets. Combustion Flame 44:8595.
7. Tayali, N. E., and, C. J. Bates. 1990. Particle sizing techniques in multiphase flows: a review. Flow Meas. Instrum. 1:77105.
8. Ungut,, A.,, A. J. Yule,, D. S. Taylor, and, N. A. Chigier. 1978. Particle size measurement by laser anemometry. Energy 2 6:330336.

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