Van Kenhove, Elisa

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Ghent University Academic Bibliography

A B S T R A C T  B O O K6Legionella pneumophila on tap:simulating disinfection measures of case study apartment BuildingsAuthors Van Kenhove E., Janssens A., Laverge J., Ghent University, Ghent, BelgiumLegionella pneumophila is naturally present in water. The bacteria is almost undetectable inwater that enters the building, in domestic hot Water (dhW) installations in buildings situations can occur that stimulate the growth of Legionella pneumophila. It is important to determine the points of risk which enhance the growth of Legionella pneumophila. The most important growth factors are temperature and flow rate.The production of dhW dominates the total energy demand of well insulated and air tightbuildings. One of the main reasons for the high energy demand is that hot water is produced,stored and distributed at temperatures above 60°C to mitigate the risk of infecting the dhWsystem with Legionella pneumophila. at these temperatures, Legionella pneumophila bacteria are effectively killed. For most of the applications of hot water, temperatures of only 30-40°C are required. This disparity doubles the temperature difference between the dhW system and the environment and has a detrimental effect on the efficiency of hot water production units.a simulation model is developed that allows to investigate the infection risk for Legionellapneumophila in the design phase of a dhW system and to test the effectiveness of disinfection techniques on an infected system. In addition to the simulation model, Legionella pneumophila measurements are performed in buildings.In this paper the simulation model is used for four case study buildings with 800 apartments to propose best suitable measures to adapt the dhW installation which is infected with Legionella pneumophila. The most effective steps to disinfect such a system and keep it healthy and energy efficient on the long term are investigated by simulation (temperature variations, flow rate, adding of insulation, ultraviolet radiation,…). The overall aim is to update existing design guidelines for dhW installations based on a trade

Legionella pneumophila on tap: simulating disinfection measures of case study apartment buildings

https://biblio.ugent.be/publication/8563573/file/8582705

Legionella pneumophila on tap: simulating disinfection measures of case study apartment buildings

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Ghent University Academic Bibliography