03-09: One Company's Legionella Standard Repair and Construction

03-09: One Company's Legionella Standard Repair and ConstructionFollowing issuance of Legionella guidelines by CTI, Shell Chemical Company (SCC) upgraded procedures for control of Legionella in its water systems. A Standard was developed which addresses all water systems. This paper will focus on SCC standards and guidelines for cooling towers. The Standard is more prescriptive than the CTI guideline and represents a compilation of regulations and guidelines in the literature. It requires a Health Risk Assessment

This paper examines the wide range of materials currently available for components used in open and closed circuit cooling towers as well as evaporative condensers

combined with an understanding of the problems involved is becoming a must

The paper will discuss how the Binary Cooling Tower (BCT) can be utilized in evaporative cooling applications to optimize recycle and reuse of circulating water system designs without the risks usually associated with high TDS water

This is the continuation of the detailed independent evaluation of microbiological

The CTI drift measurement code ATC-140 specifies that isokinetic measurements be employed for cooling tower drift emissions measurements

which includes a study of fill degradation plus improved water and airflow rate measurement techniques aimed at more accurate heat balances

and microbiological fouling

plus that on the waterside

This code applies to mechanical and natural draft towers

evaluating bids

Siting of industrial manufacturing complexes and power plants close to municipalities and highways often presents numerous obstacles related to cooling tower plume formation

The water exposure was at room temperature and 125°F revealing no performance advantage obtained from the coating