Transcript Topic I.10. Service Reservoirs: Kinds, Structures and Volume

Topic I.10. Service Reservoirs:
Kinds, Structures and Volume
Main Functions of the Service Reservoirs:
 To insure the necessary head at the water distribution
network (reservoir elevation)
 To insure the balance between water inflow and outflow
(reservoir useful storage volume)
 To keep the fire water volume (if necessary)
Kinds of Service Reservoirs
I. According to their location and technological function
 Crossover type
 Endmost type
 Intermediate type
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Kinds of Service Reservoirs
Crossover Type
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Kinds of Service Reservoirs
Endmost Type
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Kinds of Service Reservoirs
Intermediate Type
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Kinds of Service Reservoirs
II. According to their structure
 Sunken type (dig into the earth)
 Elevated (Tower) type
 Standpipe (Column) type
III. According to their protection
 Open
 Covered
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Kinds and Structures of Service Reservoirs
Sunken Type Shapes
(schemes)
1 - water inflow pipe
2 - water outflow (feeding)
pipe
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Kinds and Structures of Service Reservoirs
Pipe Systems at the Sunken Type Service Reservoirs
a - inflow pipe system
б - outflow (feeding) pipe system
b - overflow and drainage pipe system
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Kinds and Structures of Service Reservoirs
Sunken Type Structure (Plane)
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Kinds and Structures of Service Reservoirs
Sunken Type Structure (Longitudinal Section)
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Kinds and Structures of Service Reservoirs
Sunken Type Structure (Cross Section)
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Kinds and Structures of Service Reservoirs
Elevated (Tower) Type
Standpipe (Column) Type
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Kinds and Structures of Service Reservoirs
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Service Reservoir Volume Sizing
V = Vr + Vf , m3
V - total reservoir volume, m3
Vr - regulation (useful) reservoir volume, m3
Vf - fire water reserve volume, m3
Vf = 3,6.Qf.Tf , m3
Qf - fire water flowrate, l/s
Tf - fire duration, h; Tf = 2 - 3 h
Determination of the
Regulation Reservoir Volume
I. With known water inflow/outflow regimes
Vr = 1,2.(V1 + V2)
I. With unknown water inflow/outflow regimes
Vr = (0,3 - 0,5).Qmax,d
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Qmax,d - daily maximal water consumption,
13 m