Q2/A Otto engine cycle have a diameter of 14 cm and stroke 22 cm. The clearance volume is15 percent of the swept volume((Ve= 0.15xVd), using light diesel fuel at an air-fuel ratio of(A/F)= 15, at the compression stroke conditions in the cylinder are 333k and 100 kpa, amechanical efficiency of 86% ,and heating value of 44000 kj/kg. Determine: 1-Maximumtemperature. 2-Thecompression ratio. 3-Thermal efficiency. 4- Bsfc. Assume Cp-1.005kj/kg.k, C, 0.718 kj/kg.k, R= 0.287 Kj/kg K, and k=1.4.

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Answered: Q2/ A Otto engine cycle have a diameter…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

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John’s automobile has a three-liter SI-V6 engine that operates on a four-stroke cycle at 3600 RPM. The compression ratio is 9.5, the length of connecting rods is 16.6 cm, and the engine is square (B=S). at this speed, combustion ends at 20o at T.D.C. This engine is connected to Dynamometer which gives a brake output torque reading of 205 N-m. At his speed, air enters the cylinders at 85 kPa and 60o C, and the mechanical efficiency of the engine is 85%. Calculate: (a) Brake power, HP || (b) Indicated Power, HP || (c) Brake Mean Effective Pressure, Bmep , Psia || (d) Indicated Mean Effective Pressure, Imep, Psia || (e) Friction Mean Effective Pressure, Fmep, Psia
Weather Std. Cylinder of a 4-stroke 4-cylinder diesel engine operating according to a mixed (Seileger) cycle Its diameter is 80 mm and its course is 100 mm. Maximum speed 2500 RPM. In the engine with compression ratio of 16 The injection of the fuel ends at 5% of the stroke volume. Suction temperature 27°C Weather specific weight 1.225 kg / cm3 Since Cp = 0.24 Cv = 0.172 kCal / kg K T3 / T2 = 1.6, Calculate thermal efficiency, work done, average effective pressure, power?
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If an engine has a bore of 0.1 m, stroke of 0.08 m, inlet flow effective area of 4.0 × 10−4 m2, and inlet temperature of 320 K, what is the maximum speed it is intended to be operated while maintaining good volumetric efficiency?
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A four-stroke diesel engine has a piston diameter of 16.5 cm and a stroke of 27 cm. The compression ratio is 14.3, the cut-off 4.23% of the stroke and the mean effective pressure 4.12 bar. The engine speed is 264 rev/min and the fuel consumption is 1.076 kg of oil per hour, having a calorific value of 39150 kJ/kg. Calculate the relative efficiency of the engine.
In a 4-cylinder 4-stroke KA engine with volumetric efficiency ɳe=0.85, compression ratio 14: suction reference pressure 96 kPa, suction reference temperature 298 K; Exhaust pressure 108 kPa, exhaust temperature 1200 K; Find the pressure loss in the suction system since the end suction temperature is 310 K. The gas constant of the residual gas is Rr=291.9 J/kgK, Rref=Rsuction=287.13 J/kgK, the stroke volume of the engine is 0.598 liters.
Single stage, single-acting air compressor. Air delivery for this device is 30 bar at a speed of 1500 rev/min. The atmospheric condition of his location is 87 kPa and 20 ˚C, with a FAD of 0.22 m2/min. The clearance volume is 4% of the swept volume and the stoke/bore ratio is 1.3/1. Take “n” as 1.3, cp = 1.005 kJ/kg K, cv = 0.718 kJ/kg KW 1.What is the isothermal power of the compressor in kW to 2 decimal places in kW? 2. which formula will be used to evaluate the isothermal efficiency? 3. which formula will be used to evaluate the delivery volume? 4. What is the induced volume in terms of stroke volume, provide the coefficient values of the swept volume to 4 decimal places?
A pickup truck has a five-liter four stroke cycle, V6, SI engine operating at 2400 RPM. The compressionratio is 10.2:1, the volumetric efficiency is 0.91, and the bore and stroke are related as S=0.92B. Calculate:a. Stroke length [cm]b. Average piston speed [m/s]c. Clearance volume of one cylinder [cm3]d. Air flow rate into the engine [kg/s]
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[1] A Pelton turbine is driven by two jets, generating 5.0 MW at 80 rev/min. The effective head at the nozzles is 300 m of water and the nozzle velocity coefficient, KN = 0.97. The axes of the jets are tangent to a circle 2 m in diameter. The relative velocity of the flow across the buckets is decreased by 17% and the water is deflected through an angle of 165 deg. Neglecting bearing and windage losses, determine: (i) the runner efficiency; (ii) the diameter of each jet; (iii) the power specific speed.
Four-cylinder, four-stroke, Otto cycle engine takes air at 100 kPa and 50 C, and is limited to a maximum cycle temperature of 1500 C. Each cylinder has a bore of 3.5 cm, and each piston has a stroke of 4 cm. The minimum enclosed volume is 10 percent of the maximum enclosed volume. Use constant specific heats at room temperature, calculate the thermal efficiency of the cycle.

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