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The performance data of a water pump follow the curve fit
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EBK FLUID MECHANICS: FUNDAMENTALS AND A
- volume flow rate requirement of 21it/s with an of 60К Pa. A system has a index run ΔΡ Find an appropriate pump from the manufacturer's catalogue gives the following information for a centrifugal pump operating at 24rev/s: kPaQ lit/s 98.76 0.5 95 1 88.76 1.5 80 68.38 2.5 55 38.76 3.5 Two geometrically similar pumps are running at the same speed of 1000r.p.m. One has an impeller di ameter of 0. 4m and discharge of 301/s against a head of 20m. If the other pump gives half of this discharge rate, determine the head, diameter and power of the second pump.arrow_forwardA centrifugal pump has the following characteristics as shown in Table 1. Table 1: Pump characteristics Q(m3 /s) 0.033 0.029 0.027 0.0235 0.020 0.017 0.0133 H(m) 40 60 66 75 80 84 90 Efficiency % 20 45 55 68 75 66 45 The pump is used to pump water from a low reservoir to a high reservoir through a total length of 1100 m of pipe 250 mm in diameter. The difference between the water levels in the reservoirs is 25 m. Neglecting all losses except friction and assuming λ=0.042, calculate: i. The discharge and head at the duty point for the pump. (20) ii. The efficiency at the duty point. (5) [2arrow_forwardA closed thermodynamic system consists of a fixed amount of substance (i.e. mass) in which no substance can flow across the boundary, but energy can. For a closed themodynamic system we cannot add energy to the system, via substance (E ) (1.e. matter which contains energy is not allowed across the boundary) Across the Boundaries E° = No Q = = Yes W mass NO CLOSED = Yes SY STEM m = constant | energy YES Figure 1.1. If the substance inside the thermodynamic system shown in figure 1.1. (i.e. piston cylinder device) is air, is the system a Fixed closed system Moveable closed system A. В.arrow_forward
- 1. Find the air horsepower of an industrial fan that delivers 22m/s of air through a 800 mm by 1000 mm outlet. Static pressure is 167mm of water gauge and air density is 1.18 kg/m. 2. A fan has a suction pressure of 40mm water vaçuum with air velocity of 4m/s. the discharge has 100 mm of water gauge and discharge velocity of 11 m/s. Determine the total head of fan if air density is 1.2 kg/m. 3. A fan is rated to deliver 590 m3/min at a static pressure of 354 cm of water when running at 290 rpm and requiring 3.9 kW. If the fan speed is changed to 315 rpm and air handled were at 75°C instead of the standard 21°C, find the power in kW. 4. Air is flowing in a duct with a velocity of 6.62 m/s and static pressure of 4.16 cm of water gauge. The duct diameter is 1.42 m, the barometric pressure 109.4 kPa and the gauge fluid temperature and air temperature are 30°C. What is the total pressure agaínst which the fan will operate in cm of water?arrow_forwardA wind turbine gives the following data: Blade length= 55.5 m. Wind speed = 11 m/s Air density = 1.227 Kg/m3 Power coefficient = 0.55 Assuming equal efficiencies for gearbox and generator, If the Power output from wind turbine, P is 2.1 MW, then find a) Rotor Power Output, P- in M (* b) Wind Power, Pw in MW (: C) Efficiency of Generator Rotor Power Output, Pr in MWarrow_forwardIdentify the missing properties of the fluid whose properties are given in the table.Specify the selection and accounts.arrow_forward
- 1.1. The pump whose performance curves are shown in Figure P1.1 is operated at 1750 rpm and is connected to a 2-in. i.d. galvanized iron pipe 175 ft long. What will be the flow rate and power input? 100 90 Head curve 80 70 60 50 40 -Efficiency 30 20 10 20 40 60 80 100 120 140 160 180 Flow rate (gpm) FIGURE P1.1 Performance curves for a pump with a 9-in. impeller and speed 1750 rpm. 1.7. If the pump and pipe arrangement of Problem 1.1 now includes an elevation increase of 30 ft, what flow will result? Head rise (ft); efficiency ()arrow_forwardA certain gas with Cp= 0.529 BTU/lbmole-Rankine and Cv= 0.4053 BTU/lbmole-Rankine expands from 20ft3 and 500 Rankine to 30 ft3 and 1620 Rankine its pressure remains constant at 40lbf/ in2 . R(gas constant)=97.24 ft3 -lbf/lbmole-Rankine Compute: a) Change of internal energy (BTU) b) Change of enthalpy (BTU) c) Heat Transferred (BTU)arrow_forwardThe performance data for a centrifugal water pump are shown in Table for water at 77°F (gpm = gallons per minute). (a) For each row of data, calculate the pump efficiency (percent). Show all units and unit conversions for full credit. (b) Estimate the volume flow rate (gpm) and net head (ft) at the BEP of the pumparrow_forward
- Determine the pump head (unit: meter or kPa), using the following parametersarrow_forwardQUESTION 02 2.1 A pipeline connects two reservoirs such that the total head between them, when water is being pumped from one to the other can be expressed as H= 25+ (77,46Q where H is the total head (m) and Q is the discharge in m³/sec. The characteristic curve of the particular pump that can be used, is tabulated as follows: Head (m) 75 65 55 45 33 25 Discharge (m³/sec) 0. 0,02 0,03 0,04 0,05 0,055 ŋ (%) 0. 70 80 70 50 30 Evaluate graphically the discharge, head and efficiency if: 2.1.1 One pump is used 2.1.2 Two pumps are used in series. 2.1.3 Two pumps are used in parallel.arrow_forwardThermodynamicssarrow_forward
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