5- Compute the mean piston speed, bmep, torque, and power per piston area for the follo engines: engine Bore (mm) Stroke (mm) cylinders Engine speed Brake power marine 136 127 12 2600 rpm 1118 kw construction 108 95 8. 6400 447 racing 86 57 8. 10500 522

5- Compute the mean piston speed, bmep, torque, and power per piston area for the follo engines: engine Bore (mm) Stroke (mm) cylinders Engine speed Brake power marine 136 127 12 2600 rpm 1118 kw construction 108 95 8. 6400 447 racing 86 57 8. 10500 522

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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Read the peak power and peak torque from the following curve. Also, find the engine speed that the peak power and peak torque occur at, and ensure this engine speed is in Rad/sec. Torque Power N.m kW 40 35 30 25 8020 70 6015 50 40 10 30 20 5 10 00 0 1000 N (C max) N(C min) N (Pmax) 2000 3000 4000 5000 6000 Engine Speed (RPM) g/kWh 400 300 200 100 0 Specific Fuel Consumption
1. The following data were obtained on a gasoline engine operating in a pronymbrake. Engine speed: 600 rpm Torque: 1,700 ft-lbf Fuel consumption: 12.1 gal/hr a. Compute the brake horsepower. b. Compute the overall engine efficiency
1 A gasoline engine working on four stroke develops a brake power of 20.9 kW. A Morse Test was conducted on this engine and the brake power (kW) obtained when each cylinder was made inoperative by short cir- cuiting the spark plug are 14.9, 14.3, 14.8 and 14.5 respectively. The test was conducted at constant speed. Find the indicated power, me- chanical efficiency and bmep when all the cylinders are firing. The bore of the engine is 75 mm and the stroke is 90 mm. The engine is running at 3000 rpm.
2. For Pump Omicron, the pump performance data is shown in Table 2 below. Plot a curve of best fit Havailable versus Q from 0 Lpm to 30 Lpm. State the equation represented by the curve. On the same graph, plot the Hrequired versus Q and indicate the operating point. Table 2: Pump Omicron performance data Q (LPM) H (m) 0 46.5 46 42 37 29 16.5 0.0 5 10 15 20 25 30
Specific fuel consumption of a four-stroke internal combustion engine at a given rotational speed is 0.322 kg/kW-h value is minimum. Spindle power at this rotation rate is 123 kW, volumetric efficiency is 95% and air-fuel rate is 15. The number of rotations of this engine is calculated by subtracting 1.5 from the number of rotations giving the minimum specific fuel consumption. time, spindle power 162 kW, specific fuel consumption 0.394 kg/kW-h and volumetric efficiency 85%. a) Calculate the air-fuel ratio in this case. and By what percent has the efficiency of the engine changed?
please dinot copy paste from other web i need urgent A petrol engine produces 250 kW while using 1.014 kg of fuel per minute. The fuel has a lower heating value of 45000 kJ/kg, and the engine has bore of 100 mm and the stroke-to-bore ratio of 1.2. The clearance volume of the cylinder is 1.178×105 mm3. The friction power is found to be 10% of the power that engine produces. Sketch (your own) the simple neat and clean block diagram of the engine, clearly indicating the control volume and control surface, with all the given data displayed on it. For air take the value of g = 1.4. Determine the following: The brake thermal efficiency (hb, th ). The indicated thermal efficiency (hind,th ). The mechanical efficiency (hmech ). The brake engine efficiency (hb ). The indicated engine efficiency (hind ). (Hint: Engine efficiency is a function of how the ideal work or power is calculated. Frequently, the air-standard cycle is used for calculating the theoretical work.) Use standard symbols…
a) Explain what do these terms mean: fmep, mfmep, pmep, amep, imep, bmep b) Write the equation relating fmep to mfmep, pmep, and amep; c) Write the equation relating fmep to imep and bmep; d) At a given engine speed, the following parameters are obtained as follows: 1600 bmep kPa 228.45 fmep kРа 124.38 mfmep kPa 29.52 amep kРa Calculate the net indicated mean effective pressure at the same engine speed.
A four-stroke SI engine 0.08 m bore (d), 0.10 m stroke (L), is tested at full throttle at constant speed. The fuel supply (m; ) is fixed at 0.0011333 kg/s and the spark plugs of the four cylinders are successively short circuited without change of speed, brake torque (4) being correspondingly adjusted. The brake power (bp) measurements are the following: With all cylinders firing With cylinder No. 1 cut off With cylinder No. 2 cut off With cylinder No. 3 cut off With cylinder No. 2 cut off = 9.1 kW 12.5 kW 9 kW 9.15 kW 9.2 kW The lower calorific (or heating value, LCV) of the fuel is 44100 kJ/kg. The clearance volume (Va) of one cylinder 70.0x10³ mm³. Determine: (a) Indicated power (ip) of the engine under these conditions. (b) The indicated thermal efficiency (Nind, th). (c) The relative efficiency (7el) of this engine.
Provide a complete given and computation. Include all the decimals. An incomplete expansion engine is supplied with steam at 1.95 Mpa and 400C. Release occurs at 0.14 Mpa and exhaust at 50C. Test of the engine showed a brake steam rate of 12.2 kg/kwh and a mechanical efficiency of 82.5%. (a) Find the indicated engine efficiency (b) the brake mep (c) the ideal thermal efficiency of an incomplete expansion cycle operating under the same condition.
5- Match List I (performance parameter) with List II (performance curves, labelled A, B, C and D. for a constant speed diesel engine) and select the correct answer. List I 1. Smoke level 2. Brake specifice fuel consumption. 3. Bráke thermal efficiency 4. Brake power List II Codes: A B CD 3 41 2 (a) (b) (c) (d) 3 421 % Load 100 4312 4 321
A four-stroke SI engine 0.08 m bore (d), 0.10 m stroke (L), is tested at full throttle at constant speed. The fuel supply is fixed at 0.0011333 kg/s and the spark plugs of the four cylinders are successively short circuited without change of speed, brake torque being correspondingly adjusted. The brake power (bp) measurements are the following:With all cylinders firing = 12.5 kWWith cylinder No. 1 cut off = 9 kWWith cylinder No. 2 cut off = 9.15 kWWith cylinder No. 3 cut off = 9.2 kWWith cylinder No. 2 cut off = 9.1 kWThe lower calorific (or heating value, LCVf) of the fuel is 44100 kJ/kg. The clearancevolume (Vcl) of one cylinder 70.0 x 103 mm3. Determine:(a) Indicated power (ip) of the engine under these conditions.(b) The indicated thermal efficiency (c) The relative efficiency of this engine.
A four-stroke SI engine 0.08 m bore (d), 0.10 m stroke (L), is tested at full throttle at constant speed. The fuel supply is fixed at 0.0011333 kg/s and the spark plugs of the four cylinders are successively short circuited without change of speed, brake torque being correspondingly adjusted. The brake power (bp) measurements are the following:With all cylinders firing = 12.5 kWWith cylinder No. 1 cut off = 9 kWWith cylinder No. 2 cut off = 9.15 kWWith cylinder No. 3 cut off = 9.2 kWWith cylinder No. 2 cut off = 9.1 kWThe lower calorific (or heating value, LCVf) of the fuel is 44100 kJ/kg. The clearancevolume (Vcl) of one cylinder 70.0 x 103 mm3. Determine:(a) Indicated power (ip) of the engine under these conditions.(b) The indicated thermal efficiency (c) The relative efficiency of this engine. (d) Draw schametic diagram