8. Dynamics of tank with outflow centrifugal pump8.1. Identify the plant dynamics (tank) with outflow centrifugalpump in terms of transfer functions.FeedTankpumpoutflow8.2. Provide the design methodology of tank liquid level controlsystem: describe the control concept, control method, performancecriteria, control specifications and select the controller type. Selectmeasurement methods. Define each component function in liquidLevel Control. Identify the hazardous conditions, set control limitsand define control logic etc.8.3. Design and draw the simple liquid level control loop.8.4 Analyze the closed loop control systems below ( liquid level andflow). What are advantages of this structure?ISet PointFeedLevel PVTankFC

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8. Dynamics of tank with outflow centrifugal pump 8.1. Identify the plant dynamics (tank) with outflow centrifugal pump in terms of transfer functions. Feed Tank outflow dund

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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1. Estimate the volume flow rate and mass flow rate of water flowing in a river whose channel is roughly rectangular with a depth of 0.6 m and a width of 4 m, and which has a flow speed of 0.85 m/s. A weir on the river provides a working head of 1.4 m for a turbine/generator. If one third of the river flow could be diverted through the turbine which has an efficiency of 75%, estimate the electrical power that could be generated.
9.17 Following data refer to a two-stage velocity compounded impulse turbine operating on hot air: Flow rate = 1.0 kg/s Mean blade diameter = 75 cm Rotational speed - 3600 rpm Nozzle blade angle = 80 degrees from axial direction, Deviation 5° - Assuming optimum utilization factor and constant axial velocity, calculate (a) blade to gas speed ratio, (b) utilization factor, (c) rotor blade air angles at entry and exit in the two stages, (d) flow coefficient, (e) the loading coefficients in the two stages (f) power developed separately in the two stages
20. A regenerative braking system stores kinetic energy of a car so that it can be recovered when the vehicle resumes moving. One way to do this is to “store” the energy in a spinning flywheel. One such design uses a solid disk flywheel with moment of inertia 0.040 kg m2 and maximum rotation rate 45000 rpm. (a) What is the maximum energy storage? (b) In principle it could store the kinetic energy of a 1700 kg car moving at what speed before braking? (c) If this energy is used to start the car moving again in 10.0 s, what is the power output of the system?
b) Pelton wheel is a classic example of an impulse turbine. Draw the Pelton wheel bucket conceptual design and provide theoretical explanation on why the design is configured in such manner.
‘The following particulars refer to a two-row velocity-compounded impulse wheel which forms the first stage of a combination turbine: ‘Steam velocity at nozzle outlet 1630 mis Mean blade velocity 1125 mls Nozzle angle 1160 Outlet angle, first row of moving blades 18° Outlet angle, fixed guide blades oy Outlet angle, second row of moving blades 36° Steam flow rate 126kgs ‘The ratio of the relative velocity at outlet to that at inlet is 0.84 for all the blade. Determine (a) The velocity of whirl. (b) The tangential thrust on the blades. (c) The axial thrust on the blades. (d) The power developed. (e) The blading efficiency.
At mid-radius an axial turbine stage is designed for 50% reaction, zero outlet swirl, and an axial velocity component of 200 m/s (uniform through the stage). The absolute flow angle at outlet from the stator is 65° from the axial direction. a.At the design point, what is the work done by the fluid at mid-radius on the rotor (kJ/kg)? b.For no change from turbine design flow conditions, but with a 20% drop from design rotor rpm, estimate the work (kJ/kg) done by the rotor at mid-radius.
COMPRESSOR PROBLEM Compressors are used generally to increase the energy strength of incoming fluid streams, but they generally require power-work/time input to operate. # 1 Separate streams of air and water flow through the compressor and heat exchanger arrangement shown in the figure below, where the mass rate m'1 varies from 0.5 kg/s to 2.5 kg/sec in increments of 0.5 kg/sec and T6= 50°C. Steady-state operating data are provided on the figure. Heat transfer with the surroundings can be neglected, as can all kinetic and potential energy effects. The air is modeled as an ideal gas. Determine: (a) the total power provided for both compressors, in kW. (b) the mass flow rate of the water, in kg/s. c) the cost to operate the system. O Air 1 +7= 300 K M1 Mass Rate of Air M1 in kg/sec 1 0.5 kg/sec 1.0 kg/sec 1.5 kg/sec 2.0 kg/sec 2.5 kg/sec Compressor A P₂ = 3 bar +2 7₂ = 600 K WEYA T6, P6=Ps 1 P₁ = 9 bar T₁= 800 K Mass Work Work Rate of Compressor Compressor Water M6 in kg/sec 2 Compressor…
/ The following particulars refer to a two-row velocity-compounded impulse wheel which forms the first stage of a combination turbine: Steam velocity at nozzle outlet 1630 mis Mean blade velocity 1125 mls Nozzle angle :16° Outlet angle, first row of moving blades 18 Outlet angle, fixed guide blades inr Outlet angle, second row of moving blades :36° Steam flow rate 126kgs “The ratio of the relative velocity at outlet to that at inlet is 0.84 for all the blade. Determine @) The velocity of whirl.
Q.4 (a) Explain the steps involved in representing the natural and mechanically driven air flows within a building using the nodal network method.
2) A transfer pump delivers water from an on ground to an elevated tank thru a 120m-100mmØ transmission line. The required supply flow rate of the elevated tank is 120gpm. The on ground tank maintains a water level of 2.5m and the pump is located along ground level. The ground elevation of the on elevated tank is 1.2m higher than the level of the pump, the height of the leg of the tank is 13m and the inlet pipe is 2.2m from the top of the leg of the elevated tank. The fittings along the line is given on the table below, determine the WHP, BHP and MHP of the pump if the Pump efficiency is 60% and the Motor Efficiency is 58%. (C=140) Quantity K 0.19 2 Fittings and Valves Gate Valve 90 degree elbow Wye-Strainer 4 0.65 1 2.5 Check Valve 2 Water Meter 1.5 1
1- During a steam generator performance test, the following data were taken: Fuel data: Type=Coal Mass flow rate=2.5 kg/s High heat value=32.5 Mj/kg Steam data: Pressure=13 bar Dryness fraction=99.5% Mass flow rate=25 kg/s Feed water data: Saturated at 50 C° Calculate the steam generator efficiency.
15:52 13% Pump Tutorial A centrifugal pump is used to pump a liquid with the properties given below. Liquid is pumped from a storage tank at 95 kPa (a) to a discharge tank at 300 kPa (a). system configuration is given in the table below. Table 1: system configuration The Suction Discharge 4 50 Length (m) Diameter (m) 0.07 0.055 90° bends (L/D=35) 5 12 T piece (L/D = 7) 1 1 Gate valve (L/D = 35) 1 2 Static height (m) 2 5 Liquid density = 1100 kg.m³ Viscosity = 1.5 x 10-³ Pa.s Vapour pressure of the liquid = 25 kPa (a) Material of construction of pipe is commercial steel, ɛ = 000045 m Table 2: Pump data Flowrate 0 10 20 30 40 (m³.hr¹) Head (m) 55 56 51 36 6 NPSH (m) 0 2 6 11 19 A hopp 22 3.1. Graphically determine the optimal operating point of the pump in the above system using the pump data in Table 2. 3.2. Determine the NPSH of the system and determine whether the pump will cavitate when used in the above system. tlzprod.dut.ac.za . Cell C