b) An air reciprocating compressor is working at 30°C ambient temperature and the suction pressure is measured at 750 mmHg and discharge pressure is 9 bar (absolute). Given data; Bore/stroke ratio = 1 Compressor speed = 1420 rpm FAD = 50 I/h Number of cylinder = 4 Clearance volume = 3% of swept volume As an engineer, determine; a) Dimension of cylinder [mm] b) Discharge temperature [°C] c) Thermal efficiency [%] d) Power of compressor [kW] Take isentropic index, n =1.3, g = 9.81m/s and density of mercury = 13,600 kg/m3 %3D

b) An air reciprocating compressor is working at 30°C ambient temperature and the suction pressure is measured at 750 mmHg and discharge pressure is 9 bar (absolute). Given data; Bore/stroke ratio = 1 Compressor speed = 1420 rpm FAD = 50 I/h Number of cylinder = 4 Clearance volume = 3% of swept volume As an engineer, determine; a) Dimension of cylinder [mm] b) Discharge temperature [°C] c) Thermal efficiency [%] d) Power of compressor [kW] Take isentropic index, n =1.3, g = 9.81m/s and density of mercury = 13,600 kg/m3 %3D

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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3. A 4-stroke, 8-cylinder, petrol engine, has the following parameters at sea level; fue consumption = 0.75 Itr/min, engine speed = 50 r.p.s., Ap = 60 mm Hg, venturi diameter = 4 cm, atmospheric pressure = 1.03 kg/cm', C, 0.8, air and fuel densities are 1.15 kg/m' and 700 kg/m' respectively. Calculate: AF when the temperature decreases by 10%.
Why was V ( velocity ) not used in calculating pressure loss .
1. A Pelton wheel performance data are collected in the following table. Turbine speed (RPM) 3000 Shaft torque Water supply line pressure (bar) Water flow rate (L/min) (Ncm) 2.4 18.4 If water supply pipe diameter is 25 mm and turbine wheel diameter is 70 mm, calculate the hydraulic head in m, jet velocity in m/s, speed ratio, hydraulic power in W, mechanical power in W and efficiency of the turbine. What is the optimum speed (RPM) of the wheel (for maximum power)?
Data: Hp2,3 = 2 m; A3 = 20 cm²; A₂ = 1 cm²; Hp0,1 = 0.8 m; NB= 74%(pump efficiency) To determine: a) the flow (L/s); b) the area of section (1) (cm³); c) the power supplied by the pump to the fluid.
9. A water Reservoir 80m 40m f 0.005 d = 0.2m Datum C D Turbine/generator Data: v in pipe = 3 m/s v at D = 0 Pressure at D = 0 Turbine efficiency = 80% Generator efficiency = 90% a). Pressure at C[+351.5 kN/m²] b). Output power from generator [24.16 kW] Determine:
Experiment Data Take the following data for the syringe injection pump 2/ 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) v = 4Q/ (60** D²) Velocity of liquid in syringe needle (cm/min) v₁ = 40/ (60* *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) 2. 20 cm³ in 12 hours (discontinuous injection, 5 cm³ each 3 hour, injection time = 1 min). Discus the rece Solution Calculate the liquid injection rate Q = P₁ xnx60x² = 0.075xnx60xx1.5 = 7.94n- cm³ hr Calculate the velocity of liquid in barrel V₁ == 40 60xπx D² 4x7.94n 60xx1.5² = 0.07ncm hr Calculate the velocity of liquid in needle 40 60xπxd² 4x7.94n 60xπx 0.05² hr…
5. Consider a Pitot probe in high-speed flow.(c) You are flying through air at static p∞ = 0.8 atm [abs]. Your velocimeter broke,but you are still receiving the following direct stagnation pressure readings (atm[abs]) from the Pitot probe mounted on your aircraft’s noise: i) 3.152 ii) 1.357 iii) 38.428 iv) 0.8 Find the freestream Mach number corresponding to each of the pressure readings. (d) If we are to believe reading (iv), can we step out of the aircraft safely? Why?
Example (6-1): At the best efficiency point a centrifugal pump, with impeller diameter D=8 in, produces H= 21.9 ft at Q=300 gpm with N=1170 rpm. Compute the corresponding specific speed using a) U.S. customary units. B) SI units (rad/sec, m/sec, m'/sec").c) European units (rev/sec, m/sec, m/sec?). Develop conversion factors to relate the specific speeds.
Do for ARAU - GROUP 1, GROUP 5.
Untitled document File Edit View Insert Format Tools Add-ons Help Last edit was seconds ago 100% Normal text Arial E E E E .... BIUA 1E E -E 12 1 21 514 6. A pump is working on these parameters, 0.37 m3/s with pump efficiency is at 0.89%, the motor efficiency is at 0 87 % and EP is 213 kW. What is the water power in kW
26. A horizontal pipe of 150 mm diameter and 200 m length conveys water from a reservoir to a nozzle 50 mm in diameter. What would be the power of the jet if the level of water in the reservoir is 15 m above the axis of the pipe? Take friction co-efficient = 0.01. Neglect losses in the nozzle. [Ans. 2.31 kW]