Experiment Data Take the following data for the syringe injection pump Inner diameter of syringe barrel: D = 1.5 cm Inner diameter of the needle shaft of the syringe: d = 0.5 mm The thread pitch of lead screw: pt = 0.75 mm Lead screw rotation velocity (rpm): n Calculations Liquid injection rate (cm³/hr) Q = pt*n*60** D²/4 Velocity of liquid in syringe barrel (cm/min) v₂ = 40/ (60*n* D²) Velocity of liquid in syringe needle (cm/min) v₁ = 40/ (60*n* d²) K Find the rotation velocity of lead screw n and the velocity of liquid in syringe needle if the required injection dose is 1. 10 cm³ in 3 hours (continuous injection) (discontinuous injection, 5 cm³ each 3 hour, injection time = 1 2. 20 cm³ in 12 hours min). Discus the receb Solution Calculate the liquid injection rate Q=p, xnx60xD² = 0.075xnx 60 x- -7.94m cm² hr Calculate the velocity of liquid in barrel V₂ = 4Q 60x*xD² 4x7.94n 60xxx1.5² -0.07cm hr Calculate the velocity of liquid in needle 4Q V₁ = 60xxxd? 4x7.94n = 60x x0.05² =67n cm hr IL

For a 6.25-inch Model 4075 pump operated at 1160 rpm, if 450 GPM of water is to be delivered, what will be the estimated pump head in ft? HEAD IN FEET 30 25 0 0 0 10 O 6 ft 7.25" (184mm) 20 7.00" (178mm). 6.75" (171mm). 6.50" (165mm)] 15 6.25" (159mm). 5 O 16 ft O 20 ft O 12 ft aco® L/SEC 5 OT 10 Model 4075 FI & CI Series 15 -6-6 ⁰ dº 20 ANA 888 778 25 REQUIRED NPSH do 1160 RPM November 1, 2010 K ・dº- [M 90 do 30 8800 81 1HP(.75KW) DeJ kin do 60% 35 do 50 Curve no. 2175 Min. Imp. Dia. 6.25" Size 5 x 4 x 7.0 40 45 3HP(2.2KW), 2HP(1 5KW) 5HP(1 1KW)> CURVES BASED ON CLEAR WATER WITH SPECIFIC GRAVITY OF 1.0 L 75 150 225 300 375 450 525 600 675 FLOW IN GALLONS PER MINUTE NOWONG FEET 15 12 7 6 2 1 NPSH 758 50 5 HEAD IN METERS 45 586888 KPO 60 40 20 10 LO HEAD IN KILOPASCALS

A hydraulic power generator has the following operating parameters: Pump flow rate  QP = 0.4 lit/s Maximum operating pressure Pmax = 70 bar Minimum operating pressure  Pmin = 60 bar Pump total efficiency ηT = 0.9 There is a demand for 0.8 liter of oil over a period of ΔT1 = 0.1 s, at intermittent intervals. The minimum time interval between two successive demands is ΔT2 = 30 seconds. Calculate the size of the suitable accumulator and the maximum required power when operating with and without the accumulator.

Hydro electric station is installed to utilise 30 ma/sec of water of a river at a head of 7.5 m. If 85% turbine efficiency can be counted on, (i) is it feasible to develop this power by two turbines with rpm not less than 50, the turbine having specific speed not greater than 540 rpm ? (ii) what type of runner will be used ? (iii) what is the diameter of runner if the speed ratio is 0.85? [(i) N = 156'5 rpm, .. yes (ii) Kaplan (iii) P25 m]