National legislation, standards and recommendations with respect to water risk management and Legionella prevention

In this article, risk management and Legionella prevention is discussed from a practice-oriented point of view, which can be assigned to Facility Management in healthcare (FM in HC). Water systems in facilities contaminated with Legionella is a serious issue of hygienic risk which needs to be addressed and not only of economic threat or image loss to a facility. Managers, such as operators or any other duty holders, can be responsible for building-associated facilities (water systems). This paper collects, extracts and discusses FM-relevant duties. It emphasizes important issues with relevance to risk management. First, a tabulated collection of statutes, standards and other documents guiding for design, operation and maintenance to minimise risks caused by Legionella in building (drinking) water systems is presented. This is followed by well-discussed situations reported from practice in the national context of Germany. The topic of Legionella prevention of water systems is not limited to a national context. Differences exist according to legislation and to explanations of generally accepted engineering standards, i.e. norms, recommendations, or technical and guidance documents. For the people responsible, who may be assigned to the professional field of FM, there are undeniably aspects of water hygiene that could enforce criminal and civil law obligations. The results of this context-specific paper may provide support in detecting deficiencies and thus avoid potential lawsuits

Optimization of the direct feed drive by the vibration damper

This diploma thesis deals with the application of three methods to limit resonances of critical frequencies and with a description of their influence on speed control loop of linear drive. The first damping method involved the use of an electro-magnetic tilger attached to the structure of stand on critical locations. The second method involved the use of a jerk decoupling in linear direct drives. A Cauer-filter that was activated in the controller of linear motor was added to both methods. The appropriate measuring technique for these frequencies was systematically analysed and selected. Further in this document models of mechanical structure and controlling are described. Matlab®/Simulink® software was used for the data processing and the modification of models according to the real structure