Here is a partial list of water simulation packages that includes water-hammer analysis:
MIKE URBAN
AFT Impulse
WANDA 3
ARTS – Hydraulic Design of Water and Wastewater Systems
ATMOS LSIM
Pipe2000/KYpipe
HAMMER
Hytran v3.0
There is a lot of information on water-hammer as you can see here on Google.
Published by the World Health Organization (WHO):
Safe Piped Water addresses the factors affecting the presence and growth of micro-organisms in piped networks as well as the practices of water supply organisations that can directly or indirectly influence their presence and growth. The book shows that there are often public health reasons for adopting a more proactive approach to many of the traditional practices used in designing, operating and maintaining distribution networks, and to modifying the composition of the water that is fed into those networks.
Specific topics covered include:
The information and conclusions contained in Safe Drinking Water are intended for policy makers and those responsible for formulating ג€˜Water Safety Plansג€™ for the supply of drinking-water. The book is also highly relevant to engineers and scientists who are responsible for water supply planning, operations and monitoring.
Full document and more information are available at the WHO web site.
By Wallingford Software, UK
Water distribution authorities around the world have formal obligations to supply water to fight fires, and to check regularly that they meet these obligations. Underprovision of this vital community resource is not acceptable. However, overprovision also could have its problems. Because fire flow is often the dominant factor in sizing a network, particularly in smaller systems, overprovision for fire flow means oversizing the network, leading to costly capital investment. The difficulties of finding the right balance between these two conflicting factors underlines the importance of accurate fire flow analysis.
This paper describes how modeling can now help with such analysis, automating the process and making major savings on what is at present a time-consuming and costly task.
Read the full article.
From Derceto’s web site:
The only “customized off-the-shelf” (COTS) software tool which works online and in real-time to reduce the costs of treated water distribution, Derceto optimizes pump schedules to minimize distribution costs guided primarily by electricity tariffs. Direct connection to the SCADA system provides live data, which is then used by Derceto to choose the lowest cost sources of water as well as distribution and booster pump schedules. Derceto calculates the minimum cost solution from the multitude of possible pump schedule combinations to meet the dayג€™s evolving demand while maintaining defined constraints such as water turnover and storage requirements.
In Terry Love’s WWWBoard I found the following post:
Hi:
We are being tormented by a water hammer that started suddenly. Everything was fine, and then one day the toilet got clogged. I freed the clog with a plunger, no problem. But now every time that toilet is flushed, we get the “water hammer” effect. We can stop it by opening another valve in the same line (turn on the bathroom faucet), but I’d sure like to know how to fix it for real. Any suggestions?
Here is the answer:
(more…)
The following information was received from ATMOS International:
ATMOS LSIM is a modern pipeline simulation software that calculates liquid flow, pressure, density, temperature and other variables under steady state, transient and shut-in conditions. Using a fully graphical configuration tool, LSIM models pipes, valves, tanks, filters, heat exchangers, leaks, supply and delivery points.
Complex control mechanisms can be implemented for pumps and valves based on PID (Proportional-Integral-Derivative) and logic controllers.
LSIM is fully OPC (OLE for Process Control) compliant, making it possible to synchronise an off-line simulator with a real-time system. The simulation boundary condition could be a fixed value, a user-defined profile or an OPC tag from a SCADA system. All model calculated values can be saved in a database, trended graphically and output to a SCADA or other computer
systems using OPC.
LSIM simulates dynamic flow of single liquid, batched fluids, mixed fluids and vapour pockets. For the simulation of batched fluids, batch interface volume can be calculated together with the interface position and length.
With a configurable grid length from 0.5 meter to tens of kilometers, LSIM is accurate enough for detailed surge analysis and fast enough for operational scenario analysis and planning.
More information can be found at ATMOS International web site.
Simulation & optimization of water supply networks. From the University of Karlsruhe web site:
KANET Simulation
KANET Simulation performs the time extended hydraulic network balance of a reticulate system whose graph, diameters, pipe material or friction factors, flow input and demand, characteristics of pumps, boosters, valves, location of tanks, pumping stations, valves are known. The model also allows for tracing the propagation of an input concentration.
KANET Optimization
KANET Optimization delivers cost optimal diameters and pumping heads of a reticulate water supply network based upon a specified design demand and subject to constraints such as max velocities, min supply pressure, location of pumps, tanks and reservoirs. Already existing pipes are taken into account, optimal tradeoffs between investment and operating cost are observed using the present value. Simultaneous optimization of the layout is included.
I have been working for some time now on a new network model for a large city with population of about 280,000. The network layout was received from the municipality in AutoCad format. The main problem with this file is that it was not built with a water distribution model perspective. The file is built from many polylines that intersects with no junctions (nodes) to connect them. In some cases lines that should connect do not. In other cases lines that should not be connected are connected.
Iג€™m using the free ArcView extension for EPANet called GISRed to import the AutoCad file and convert it to an INP EPANet format. GISRed was developed by Hugo Bartolֳn and directed by Professor Fernando Martinez both from the Research Group of Hydraulic Networks and Pressurized Systems (REDHISP) at the Polytechnic University of Valencia (UPV). See GISRed home page.
One of my main problems was that after I imported the layout to the INP file I realized that since the poor shape of the AutoCad file my network was disconnected in many places. Going over the entire network, link by link and node by node, is a tedious job. The solution was found once again within GISRed. A tool called ג€˜Connectivityג€™. It does a simple thing. It colors each subset of the network in different color and allows the user to see exactly which parts are disconnected.
From DHI web site:
MIKE URBAN combines DHI’s 20-year tradition for leadership in simulation engines with ESRI’s world leading GIS technology. The result is a tool set that defines a new industry standard in usability, productivity and pure pleasure.
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