Hydraulic Structures: Fourth Edition

particular efficiency of the pump, and the system selection largely depends on the discharge–head requirements and on pump effic ...

to store the extra water, the pump may be throttled, changing the system curve to (c), thus reducing the discharge to Q 1 and in ...

The bellmouth entry to the pump suction pipe suppresses flow sepa- ration and ensures uniform flow throughout the intake cross-s ...

(Section 13.6). Archimedes screw pumps are used to lift wastewater with large floating bodies into treatment works. (e) Abstract ...

A good sump design must therefore avoid the formation of vortices; this can be achieved by directing the flow uniformly across t ...

Fig. 13.9 Typical recommended sump designs (after Prosser, 1977) ...

13.6 Screening devices All major pumping stations (especially sewage and stormwater pumps) have to be provided with bar screens ...

13.8.1 Flywheels A flywheel coupled with the pump unit provides additional inertia so that the pump continues to rotate even aft ...

pressure drop. On the other hand, it accepts water when the pump opens, i.e. under positive transient conditions. Between the pu ...

where is the density of water (1000 kg m^3 ),Kis the bulk modulus of water ( 2  109 Nm^2 ) and Eis the Young’s modulus of the ...

SelectingHmaxandHmin, suitable values of Ks, R andV 0 (from 2 V 0 a/Q 0 L) can be found, and the required volume of the air ves ...

Pumping stations for water supply from river intakes or boreholes are normally designed to discharge continuously over a period ...

Worked Example 13.1 The gravity flow between an impounding reservoir and a service reservoir is to be augmented by 25% owing to ...

the new discharge is 56.23 m. This head must be supplied by the pump and hence its output, gQH, is 9.810.31956.23176 kW. Ther ...

570 PUMPING STATIONS Fig. 13.14 Pump–pipeline characteristics The present maximum flow is 50 l s^1 , with the pump working agai ...

Discharge (l s^1 ) 000204060 Head (m) 100 90 66 38 The discharge is 64 l s^1 at a total head of 31.5 m. Hence the head per pump ...

Solution Referring to Fig. 13.15 and to equation (ii), the pump test results give R 0 215 m or R 0 /Q7.15. (iii) Q(l s^1 ) 203 ...

Worked Example 13.4 A pumping plant delivers 1.3 m^3 s^1 of water into a reservoir with a water level 75 m above steady state wa ...

The simplified solution (no losses; isothermal gas law) is given as follows:Hmax1.4H 0 1.4(7510)119 m (absolute units). From ...

Chapter 14 Waves and offshore engineering 14.1 Introduction A large number of offshore structures of various types and sizes hav ...