1 topic i.10. service reservoirs: kinds, structures and volume main functions of the service...
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3 Kinds of Service Reservoirs Endmost TypeTRANSCRIPT
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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 ReservoirsI. 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 pipe2 - water outflow (feeding)
pipe
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Kinds and Structures of Service Reservoirs
Pipe Systems at the Sunken Type Service Reservoirsa - inflow pipe systemб - outflow (feeding) pipe systemb - 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/sTf - 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
Qmax,d - daily maximal water consumption, m3