90-03: Operating Feedback of French Cooling Towers Civil Work and EquipmentAs the owner of twenty six natural draught wet cooling towers, EDF has set up a specific organization aimed at monitoring the evolution of civil works and equipment. The subject of this presentation is to explain EDF's operating feedback and the problems encountered, and to describe the methods used and the studies carried out. The main concerns are the behavior of the shell, the availability during winter periods and the ageing of the heat exchange

Recommendations to update ATC-128 will be proposed to improve the correlation of results between the codes

The development of accurate and representative cooling tower performance penalties is critical to the optimization of cooling systems design and the assessment of associated performance penalties

Over the past 50 years or so

Their widespread use has been limited

EDF decided to run two campaigns of tests: the first one focused on the effect of the mechanical deterioration of drift eliminators

105 (ATC-105) dealing with collection and reduction of field data

Tower manufacturers or end users are tasked with selecting the proper motor

Cooling tower models were used to simulate industrial conditions and evaluate the efficacy of commercially available biocides against adherent (sessile) populations of microorganisms

This participation of soluble silica in the development of heat-resistant films occurred at circulating water silica contents below 75 ppm

This paper presents test data taken on actual cooling tower installations showing the impact of fan tip clearance on overall tower performance

in particular

This requires careful design of the overall system starting from cooling water/sea water exchangers