H2OSURGE/InfoSurge/H2OMAP Surge offer
all the capabilities your organization demands from
a state-of-the-art hydraulic transient network solver
giving you greater power to strengthen, manage and
operate your water distribution system and protect
your customers' safety and health.
Trade Up to Power:
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Stand-alone geospatial application (H2OMAP Surge) |
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Fully integrates with ArcGIS (InfoSurge) |
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Fully integrates with AutoCAD (H2OSURGE) |
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Interfaces seamlessly with EPANET (automatically
import and export any EPANET file) |
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Uses the Enhanced Lagrangian Method of Characteristics
(a.k.a. Wave Characteristic Method) |
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Exhibites faster, more efficient, more robust,
more stable and superior convergence characteristics |
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Accurately predicts pressure surges due
to vapor pocket collapse |
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Leverages the unprecedented power and flexibility
of ArcGIS and AutoCAD for unparalleled graphical
editing and astounding results presentation |
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Lets you clearly visualize transient phenomenon
like cavitation and water column separation
using vivid dynamic animation |
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Models any hydraulic element and surge protection
device and transient condition |
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Analyses any combination (multiple) of transient
conditions and surge protection devices |
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And many, many more....
Unparalleled Scenario Management
H2OSURGE/InfoSurge/H2OMAP Surge allow
the user to quickly create and evaluate an array
of modeling alternatives as well as various levels
of network skeletonization (scenarios) of your
water distribution system to give you a clear
illustration of how your system will react to
different surge protection devices, network configurations,
operating conditions, and planning horizons.
Creating a Transient
H2OSURGE/InfoSurge/H2OMAP Surge allow the user to
create a transient by altering pump and valve
operations as well as junction demands (inflows
or outlfows). Unsteady flow conditions will then
result and computation of pressure head and flow
variations will be automatically carried out for
the duration of the transient event.
Creating a Transient - Pumps. Operating
speed changes for pumps produces transients. The
loss of driving power to a pump can lead to pipe
collapse due to buckling or the formation of a
vapor cavity and its subsequent collapse. Other
transient problems may occur due to slam of a
swing check valve, or from a discharge valve closing
either too quickly (column separation), or too
slowly (surging from reverse flow). A time dependent
change in the speed ratio(s) (operating speed/rated
speed) can be defined for all types of pumps.
Pumps can also be tripped (lose power) and the
resulting rundown calculated. A trip can be specified
with a ratchet, which will present reverse rotation.
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- The pump is running at full speed
(speed ratio of 1.0) for 1 second and
then the speed ramps down to zero over
the next 2 seconds. |
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| Example
- The pump speed ramps up from zero
to 1 (full speed) in 2 seconds.
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Transient - Valves. A change in the ratio
of the stem position for a valve will produce
a transient. Valve closure can result in pressures
well over the steady state values, while valve
opening can cause seriously low pressures,
possibly so low that the flowing water vaporizes
inside the pipe. Valve closing and opening
action can be modeled by providing time history
of the valve stem movement. Functions relating
valve stem movements to the open flow area
for five standard valves are directly incorporated
into H2OSURGE/InfoSurge including
ball, butterfly, gate, globe, and needle valves.
Users can also create their own valve operations
as User Valves. This allows modeling of any
type of valve operation. |
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| Example
- The user valve is fully open at
time zero and 20 percent open at time
= 2 seconds. The user valve is fully
closed at time = 10 seconds. |
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| Creating a
Transient - Junction Demand Changes. A
change in the demand at a junction will produce
a transient. This can be used to simulate
a hydrant opening or any rapid change in demand.
The temporal change in demands can be specified
to define the demand variation. |
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| Example
- An external demand of 45 gpm is
held for 2 seconds and then ramps up
to 1,200 gpm over the next 4 seconds.
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| Installing
Surge Control/Protection Devices
Many different types of surge protection
devices can be used to help control starting
and stopping pressure transients in water
distribution systems. The objective is to
reduce the rate at which changes to the
flow occur. H2OSURGE/InfoSurge
can accommodate a wide range of commonly
employed surge protection devices including
side discharge orifices, open surge tanks,
closed surge tanks, bladder surge tanks,
pressure relief valves, surge anticipation
valves, air vacuum valves, and rupture disk.
These devices would normally be installed
at or near the point where the disturbance
is initiated such as at the pump discharge
or by the closing valve (with the exception
of air relief/vacuum breaking valves and
feed tanks).
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are completely identical and hence the ultimate
choice of surge protection devices and operating
strategies will usually differ. Using H2OSURGE/InfoSurge,
a transient analysis can be effectively carried
out to predict the effect of each individually
selected device or any combination of devices.
The use of multiple devices may prove to be
the most desirable and most economical. |
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Hydraulic
Calculation Tools
H2OSURGE/InfoSurge/H2OMAP Surge provide many
useful hydraulic utilities for computing important
parameters required for surge analysis including
an automated wave speed calculator, resistance
calculator, pump inertia/specific speed calculator,
useful pump power (hp or kW) calculator, pump
file characteristics calculators, and valve
stroking calculator. In addition, an automated
pump file selection tool is provided to assist
the user in determining the appropriate pump
file (four quadrant pump modeling). |
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