None 0. The air flow to a four-cylinder, four-stroke diesel engine is 2.15 m'/min . During a test onthe engine the following data were recorded:Cylinder borePiston strokeRotational speedBraking torqueFuel consumptionFuel heating valueAmbient temperatureAmbient pressure10.5 cm12.5 cm1200 rpm150 N-m5.5 kg/h43124 kJ/kg20°C1.03 barCalculate for these conditions:• Brake thermal efficiency.• Brake mean effective pressure.• Volumetric efficiency.

Internal combustion engine It is a device which used to convert chemical energy of fuel into heat…

Answered: Calculate for these conditions: • Brake…

Engineering

Mechanical Engineering

Calculate for these conditions: • Brake thermal efficiency. Brake mean effective pressure. Volumetric efficiency.

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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Q3/ Answer the following question A 3.3 liters and 6 cylinders S.I. engine operates with a compression ratio of 7.5. The pressure and temperature during the suction stroke are 1 bar and 25 °C, respectively. Heat added during the cycle is 1250 kJ/kg. Do a complete thermodynamic analysis of the ideal cycle of this engine and calculate its actual efficiency. KS)
The following data refer to a 12-cylinder, single-acting, two-stroke marine diesel engine:Speed: 150 rpmCylinder diameter: 0.8mStroke of piston: 1.2 mArea of indicator diagram: 5.5x 10-4 m2Length of diagram: 0.06 mSpring value: 147 MPa per mFind the net rate of work transfer from the gas to the piston in kW.
A crawler with 1.5 m diesel engine has the following information: Cost of equipment Shipping cost Unkoading &assembling at destination Engine Crankcase capacity 1lours between oil changes Operating factor Useful life, with no salvage value Hours operated per year Weight Cost of fuel per liter Cost of oil per liter Maintenance $82260 $2448 $220 160 hp 22.71 liter 100 hr 06 6 vears 2000 61700 kg 0.33 $/liter 0.53 S/liter 100% of Depreciation 12% of Average Valuc Investment 1- what is the initial capital cost of the crawler?
HANDWRITTEN AND FINAL ANSWER MUST BE IN ENGLISH UNITS. Show solution.ANSWER iii. Consider an ideal gas with the following characteristics: R = 115 ft-lbf/lbm-R Cp = 0.25 + 0.00035T (BTU/lbm-R) i. Solve for the value of k at 1250 R. ii. Refer to the table shown below: SEE IMAGE iii. Solve the following unknown parameters for Carnot cycle: Volume at end of isothermal compression Heat added and Heat rejected Wnet Efficiency Mean effective pressure iv. Solve the following unknown parameters for Otto Cycle Mass Pressure and Temperature ateach corner Heat added and Heat rejected Wnet Efficiency Mean effective pressure Percentage clearance v. Solve the following unknown parameters for Diesel Cycle with 6% cut-off. Compression ratio Percentage clearance Heat added and Heat rejected Wnet Efficiency Mean effective pressure
H.W: In an Sl engine compression ratio is 5. The pressure and temperature at the beginning of cycle are (1 bar), ( 300 K). The peak pressure is (40 bar), Find pressure and temperature at salient points, and the efficiency of Otto cycle. Sketch the pressure-volume [P-v] diagram for this cycle. k 1.4, CP = 1.00 kJ/kg. K, CV = 0.718 kJ/kg.
In a laboratory test of a 4-stroke engine with Vd = 3.05 liters at N = 3000 RPM the following performance data are measured: net IMEP 107.9 lbf/in2 , 70.32 brake horsepower, fuel flow rate 16.66 kg/hr., air flow rate 269.6 kg/hr. The fuel is C8H18 (QR = 4.3 x 107 J/kg.) The ambient air temperature is 295K. The intake pressure gauge is broken, so the intake pressure is not known. Determine: (d) brake thermal efficiency, (e) indicated torque, (f) Is this engine throttled, turbocharged or neither? Explain. (Hint: compute the volumetric efficiency.)
In a laboratory test of a 4-stroke engine with Vd = 3.05 liters at N = 3000 RPM the following performance data are measured: net IMEP 107.9 lbf/in2 , 70.32 brake horsepower, fuel flow rate 16.66 kg/hr., air flow rate 269.6 kg/hr. The fuel is C8H18 (QR = 4.3 x 107 J/kg.) The ambient air temperature is 295K. The intake pressure gauge is broken, so the intake pressure is not known. Determine: (a) Brake MEP, (b) Friction MEP, (c) equivalence ratio, (d) brake thermal efficiency, (e) indicated torque, (f) Is this engine throttled, turbocharged or neither? Explain. (Hint: compute the volumetric efficiency.)
At the beginning of the compression process of an air standard Otto cycle, p1 = 1 bar, T1 = 300 K. The maximum temperature in the cycle is 2250 K and the compression ratio is 9.8. The engine has 4 cylinders and an engine displacement of Vd = 2.6 L. Determine per cylinder: Only the letters d,e, and f are only needed thank you! a) the volume at state 1.b) the air mass per cycle.c) the heat addition per cycle, in kJ.d) the heat rejection per cycle, in kJ. - <e) the net work per cycle, in kJ. - <f) the thermal efficiency. - <g) the mean effective pressure, in bar.h) Develop a full exergy accounting per cycle, in kJ. Let T0 = 300 K, p0 = 1 bar.i) Devise and evaluate the exergetic efficiency for the cycle.
1.2 A four cylinder, four stroke diesel engine has brake mean effective pressure of 6 bar at full load speed of 600 rpm and specific fuel consumption of 0.25 kg/kWh. The cylinder has bore of 20 cm and stroke length of 30 cm. The air fuel ratio is measured as 26 from the exhaust gas analysis. The ambient conditions are 1 bar, 27°C. Assuming the calorific value of fuel as 43 MJ/kg determine 1.2.1 the brake thermal efficiency, 1.2.2 the volumetric efficiency, 1.2.3 the brake power.
Provide a complete and logical solution for each problem. If linear interpolation is required in the problem, tabulated values is considered as a solution. Also, provide T-S or P-V diagrams for each problem 1. An ideal otto cycle engine with 15% clearance operates on 0.227 kg/s of air: intake state is 100.58 kPa, 37.7°C. The energy released during combustion is 110 kJ/s. For hot-air standard, with k = 1.32, compute: a. Pat each point in kPa b. T at each point in K c. V at each point in m d. Efficiency of the cycle 2. For a Rankine Cycle, steam at 5 MPa, 450°C expands to 0.036 MPa. For 10 kg/s of steam, determine: a. Heat added b. Heat rejected c. Work of turbine d. Thermal Efficiency
2. In a 30-minute trial of an oil engine running at 1750 rpm, the engine consumes 27.3 kg of fuel with a calorific value of 42,300 kJ/kg at a brake torque of 1640 N-m. There are 880 kg of jacketed cooling water system in the engine entering at 17 deg C and leaves at 77 deg C. There are 310 kg of air entering the intake manifold. The temperature of air at the intake manifold is 19 deg C and the temperature at the exhaust manifold is 586 deg C. Assuming mean specific heat capacity of exhaust gas to be 1.25 kJ/kg-K, determine the following D) Exhaust loss in kJ/min E) Radiation and Unaccounted Losses in kJ/min
2. In a 30-minute trial of an oil engine running at 1750 rpm, the engine consumes 27.3 kg of fuel with a calorific value of 42,300 kJ/kg at a brake torque of 1640 N-m. There are 880 kg of jacketed cooling water system in the engine entering at 17 deg C and leaves at 77 deg C. There are 310 kg of air entering the intake manifold. The temperature of air at the intake manifold is 19 deg C and the temperature at the exhaust manifold is 586 deg C. Assuming mean specific heat capacity of exhaust gas to be 1.25 kJ/kg-K, determine the following A) The brake horsepower in B) Energy chargeable to the engine in kJ/min C) Cooling loss in kJ/min D) Exhaust loss in kJ/min E) Radiation and kJ/min Unaccounted Losses in