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Professional CAD/CAM tools built on Inventor and AutoCAD
Integrated BIM tools, including Revit, AutoCAD, and Civil 3D
Professional CAD/CAM tools built on Inventor and AutoCAD
Transcript
00:04
When using info works.
00:05
WS pro it is important that you understand how
00:08
this software accounts for the demand on water networks
00:11
demand,
00:12
which can vary over time is the water that is
00:15
required by users at a given point within the network.
00:18
For example,
00:19
the water required by a housing development would be
00:22
different from that of a school or factory.
00:25
Water transfers can be considered a positive or negative demand on
00:29
the network depending on if the water is entering the network,
00:32
negative demand or leaving it positive demand.
00:37
In reality,
00:38
a network will also experience some degree of leakage which is any water
00:42
lost from a point in the network that cannot otherwise be accounted for.
00:47
This leakage can be represented in info works. WS pro
00:51
water companies tend to have three general categories of water
00:55
revenue,
00:56
non revenue
00:57
and other
00:60
revenue.
01:00
Water is defined as metered or un metered consumption that is paid for by the user,
01:06
non
01:07
revenue. Water nrw
01:09
can be unauthorized use or losses due to leakage or main breaks.
01:14
Other is defined as exceptional demand or transfers.
01:19
The general principles of allocating demand in a network can vary
01:23
but a typical process involves first identifying the
01:26
various types of customers in the network.
01:29
Then
01:30
the 24 hour flow profile or daily usage
01:33
pattern is used to determine how to allocate water
01:37
to do this. You must identify leakage using the minimum nightly flow.
01:42
With the assumption that the water leaving the system at this time
01:45
is being lost to leakage rather than consumed by a user.
01:50
Then you subtract any known legitimate use flows from
01:53
the remaining flow to find the domestic demand profile.
01:58
Demand almost always varies over the course of a day.
02:01
And you can model it in one of two ways
02:04
using demand categories or transfer nodes
02:08
leakage can be constant or vary over the day.
02:12
When modeling demand in info works. WS pro
02:15
the demand and leakage are only calculated from the notes.
02:19
The demand diagram window is used to edit demand categories.
02:24
A demand category defines a 24 hour demand profile which is to be applied
02:29
at the nodes for each type of user such as customer demand or leakage
02:35
demand categories allow for different demand patterns across a
02:38
day of the week or daily slash monthly.
02:40
Scaling factors.
02:43
The demand profile can also be updated from live data
02:47
demand profiles are considered to be either factored or direct
02:52
factor.
02:53
Demand is the most common demand type in which we know the volume of water
02:57
consumed over an average day but not how it is used over that 24 hours.
03:02
The volume may be known as total use per property or person per day
03:07
and is typically measured as a volume of water such as cubic meters.
03:12
It may also be known as the average flow rate such as liters per second.
03:17
Best practice is to generate a 24 hour profile and normalize it for an average of one.
03:23
The demand at any given time is the total daily use divided by
03:27
the simulation time step multiplied by the factor at the time step.
03:32
Direct demand is a bit simpler as this demand type is used for monitored customers.
03:37
Generally large consumers
03:39
factories would be one example,
03:42
the volume of water used over time is already known.
03:45
So you would just assign this demand type to a node.
03:49
Direct demand can be scaled if necessary
03:53
transfer nodes are used to model transfers of water into or out of a network.
03:58
Examples would include network transfers,
04:01
bleeds or the output of a treatment works.
04:06
However,
04:07
these cannot be used as the only source of water in a network as
04:11
a source of pressure input is necessary such as a reservoir or fixed head
04:17
transfer notes can also be used to represent large customers.
04:20
But this is not recommended if the direct demand category is available
04:26
info
04:26
works.
04:26
W S pro uniquely supports customer points which can represent individual
04:31
customer properties and allow for a more accurate demand allocation.
04:36
Customer points link to a pipe which in turn links to a node.
04:41
This allows for more complex modeling
04:43
adjustment of demands and finer scale analysis
04:47
demand can also be manually allocated to nodes similar to
04:51
how it is done in info water or EPA net.
Video transcript
00:04
When using info works.
00:05
WS pro it is important that you understand how
00:08
this software accounts for the demand on water networks
00:11
demand,
00:12
which can vary over time is the water that is
00:15
required by users at a given point within the network.
00:18
For example,
00:19
the water required by a housing development would be
00:22
different from that of a school or factory.
00:25
Water transfers can be considered a positive or negative demand on
00:29
the network depending on if the water is entering the network,
00:32
negative demand or leaving it positive demand.
00:37
In reality,
00:38
a network will also experience some degree of leakage which is any water
00:42
lost from a point in the network that cannot otherwise be accounted for.
00:47
This leakage can be represented in info works. WS pro
00:51
water companies tend to have three general categories of water
00:55
revenue,
00:56
non revenue
00:57
and other
00:60
revenue.
01:00
Water is defined as metered or un metered consumption that is paid for by the user,
01:06
non
01:07
revenue. Water nrw
01:09
can be unauthorized use or losses due to leakage or main breaks.
01:14
Other is defined as exceptional demand or transfers.
01:19
The general principles of allocating demand in a network can vary
01:23
but a typical process involves first identifying the
01:26
various types of customers in the network.
01:29
Then
01:30
the 24 hour flow profile or daily usage
01:33
pattern is used to determine how to allocate water
01:37
to do this. You must identify leakage using the minimum nightly flow.
01:42
With the assumption that the water leaving the system at this time
01:45
is being lost to leakage rather than consumed by a user.
01:50
Then you subtract any known legitimate use flows from
01:53
the remaining flow to find the domestic demand profile.
01:58
Demand almost always varies over the course of a day.
02:01
And you can model it in one of two ways
02:04
using demand categories or transfer nodes
02:08
leakage can be constant or vary over the day.
02:12
When modeling demand in info works. WS pro
02:15
the demand and leakage are only calculated from the notes.
02:19
The demand diagram window is used to edit demand categories.
02:24
A demand category defines a 24 hour demand profile which is to be applied
02:29
at the nodes for each type of user such as customer demand or leakage
02:35
demand categories allow for different demand patterns across a
02:38
day of the week or daily slash monthly.
02:40
Scaling factors.
02:43
The demand profile can also be updated from live data
02:47
demand profiles are considered to be either factored or direct
02:52
factor.
02:53
Demand is the most common demand type in which we know the volume of water
02:57
consumed over an average day but not how it is used over that 24 hours.
03:02
The volume may be known as total use per property or person per day
03:07
and is typically measured as a volume of water such as cubic meters.
03:12
It may also be known as the average flow rate such as liters per second.
03:17
Best practice is to generate a 24 hour profile and normalize it for an average of one.
03:23
The demand at any given time is the total daily use divided by
03:27
the simulation time step multiplied by the factor at the time step.
03:32
Direct demand is a bit simpler as this demand type is used for monitored customers.
03:37
Generally large consumers
03:39
factories would be one example,
03:42
the volume of water used over time is already known.
03:45
So you would just assign this demand type to a node.
03:49
Direct demand can be scaled if necessary
03:53
transfer nodes are used to model transfers of water into or out of a network.
03:58
Examples would include network transfers,
04:01
bleeds or the output of a treatment works.
04:06
However,
04:07
these cannot be used as the only source of water in a network as
04:11
a source of pressure input is necessary such as a reservoir or fixed head
04:17
transfer notes can also be used to represent large customers.
04:20
But this is not recommended if the direct demand category is available
04:26
info
04:26
works.
04:26
W S pro uniquely supports customer points which can represent individual
04:31
customer properties and allow for a more accurate demand allocation.
04:36
Customer points link to a pipe which in turn links to a node.
04:41
This allows for more complex modeling
04:43
adjustment of demands and finer scale analysis
04:47
demand can also be manually allocated to nodes similar to
04:51
how it is done in info water or EPA net.
When using InfoWorks WS Pro, it is important to understand how this software accounts for the demand on water networks. Demand, which can vary over time, is the water that is required by users at a given point within the network.
Water transfers can be considered a positive or negative demand on the network, depending on if the water is entering the network (negative demand) or leaving it (positive demand).
In reality, a network will also experience some degree of leakage. This leakage can be represented in InfoWorks WS Pro.
The general principles of allocating demand in a network can vary, but a typical process involves:
Demand almost always varies over the course of a day, and can be modelled using demand categories or transfer nodes. Leakage can be constant or vary over the day.
Factored demand is the most common demand type.
Direct demand is used for monitored customers, generally large consumers. The volume of water used over time is already known, so this demand type is simply applied to a node. Direct demand can be scaled if necessary.
Transfer nodes are used to model transfers of water into or out of a network.
InfoWorks WS Pro uniquely supports Customer Points.
How to buy
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