Following nosocomial cases of Legionella pneumophila, the investigation of a hot water system revealed that 81.5% of sampled taps were positive for L. pneumophila, despite the presence of protective levels of copper in the water. A significant reduction of L. pneumophila counts was observed by culture after heat shock disinfection. The following corrective measures were implemented to control L...

Abstract—A steam power plant is housed with various types of equipments like boiler, turbine, heat exchanger etc. These equipments are mainly connected with piping systems. Such a piping layout design depends mainly on stress analysis and flexibility. It will vary with respect to pipe geometrical properties, pressure, temperature, and supports. The present paper is to analyze the presence and e...

Alias Limited, market leader for piping isometric software, today announced the availability of I-View, a 3D pipe visualization tool. I-View is capable of handling single or multiple pipes from any 3D plant design system supporting ISOGEN. Even piping ® les from diå erent systems can be viewed as a single model. This new module now provides I-Sketch users with the ability to view pipes in true ...

This paper presents findings from shake table experiments on cable-braced and unbraced welded hospital piping systems. The research identifies the capacity characteristics of a hospital piping system with and without bracings as well as the system’s weak points. The system was tested to the ICBO AC156 acceptance criteria for nonstructural components. The input motion of 1g was amplified to almo...

Background: Water distribution networks (WDNs) are facilities that require massive investment and their optimization is very important. This study aimed to optimization and development of models for promoting WDNs with using engineering judgment. In this method, instead of controlling all system states, it is possible to search the optimal set of options based on engineering judgment and hydra...

Traffic and census tract population projections are analyzed using ArcGIS to estimate future potable water demands for the City of Tucson, Arizona. The estimated demands are applied to Tucson Water’s current hydraulic model using Haestad Methods’ WaterGEMS software. The model is then used to determine what facility and piping modifications will be required to meet growth within current service ...

With the aim of tracking the deteriorating process of a specific individual multi-state system consisting of more than one multi-state component, a dynamic reliability assessment method which can utilize systemlevel observation history to dynamically update the reliability function of multi-state degraded systems is developed in this paper. The current and future state probabilities of componen...

urban facilities are necessary components of cities. in all grown and developed cities of the world there are tremendous network of facilities such as water and electric ties, water sewage drainage, water piping and gas piping. that has not been installed in proper depth underground and locations and with growing of the cities and consumption of population. they need to be replaced by excavatin...

In this paper, the transient refrigerant gas flow in a two-cylinder rolling piston type rotary compressor is simulated using STAR-CD, a general computational fluid dynamics (CFD) software. Three models with different suction piping systems are calculated respectively, one is two suction pipes were connected from accumulator to each cylinder separately (separate suction piping system), the other...