Exambel-3The engine of an air-standard Diesel cycle has six cylinderof 10 Cm bore(diameter) and 12 cm strok, the engine speed is 2000 r.p.mAt the beginning of compression, the air is at lookpa and 300k.Ifthe clearance volume is 6.667 percent of The stroke volume, computeCompression ratio pressure and temperature of the air afterCompression thermal efficiency and power out put if the airis heated to 1750 k.

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Answered: Exambel-3 The engine of an air-standard…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

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Q3:A small truck has #cylinder ,4 liter compression ignition engine that operates on irstandard Dual cycle with air fuel ratio of 16:1, the compression ratio is 17 and the cylinderdiameter is 14.5Cm. At the start of compression stroke Ta=5O'C and Pa=100 kpa .It can beassumed the half of the heat input is added at constant volume and halt at constant pressureCalculate:-Temperature and pressure at each state of the cycle. -Indicated thermal efficiency.
Q-4 An air standard Diesel cycle that has acompression ratio of 18 and the cut off ratio of 2.1. At the beginning of the compression Process, the temperature, pressure and volume are 300k, lookpa and 0.005m³ respectively. Calculate ①maximum pressure The temperature at the end of adiabatic expansion 3 work mean effective pressure. For air take Cp = 1.0035 kj/kg.k and R = 0.287 Ki/kg k done
The compression ratio of an Otto cycle is 8, at the beginning of the zanthropic compression process, the pressure of the air is 100 kPa, the temperature is 27 "C, the volume is 550 cm. At the end of the lzantropic expansion process, the temperature of the air is 700 K. Using the specific temperature values at room temperature (according to the cold air standard assumptions) Find the gravity of the air.
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1.2 Estimate the loss in air standard efficiency for the diesel engine for the compression ratio 14 and the cut-off changes from 6% to 13% of the stroke. 1.3 The compression ratio of an air standard dual cycle is 12 and the maximum pressure on the cycle is limited to 70bar. The pressure and temperature of the cycle at the beginning of compression process are 1bar and 300K. Calculate the thermal efficiency and Mean Effective Pressure. Assume cylinder bore = 250mm, Stroke length = 300mm, Cp=1.005K J/Kg K, Cv=0.718KJ/Kg K. %3D
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A diesel engine has a compression ratio of 15 and heat addition at constantpressure takes place at 6% of stroke. Find the air standard efficiency of theengine.
An air standard engine has a compression ratio of 20na cut-off ratio of 5. If the intake air pressure andtemperature are 100 kPa and 27 deg C, find the work inkJ per kg.
Brayton Cycle:18. An air standard Brayton cycle operates with compression ratio of 6 and temperature at the start and end of heat addition are 170°C and 820°C. Find the temperature at the end of expansion.
An engine working on the Otto Cycle has a compression ratio of 10/. At the beginning of the compression stroke the temperature of the air is 30oC. After the addition of heat constant volume the temperature of the air rises to 1100 oC. Find the heat supplied, heat rejected & the net work done per kilogram of air in the cylinder. What is the efficiency of the cycle?
For an engine working on the ideal Dual cycle, the compression ratio is 10 and the maximum pressure is limited to 70 bar. If the supplied is 1680 kJ/kg, find tlerressures and temperatures at the vaae the cycle ane kJ yele efficiency. The pressure and temperature of air at the commencemelil Of compression are 1 bar and 100 °C respectively. Assume Cp = 1.004 kJ/kg K and Cy .e «alient points of 0.717 kJ/kg K for air.
Consider an air standard Diesel cycle. At the beginning of compression, the temperature is 300 K and the pressure is 101.35 kPa. If the compression ratio is 15 and during the process 1860 kJ/kg of air as added as heat, calculate the following: The maximum cycle pressure a. 3726 kPa b. 1109 kPa The maximum cycle temperature a. 1680 K b. 2740 K The thermal efficiency of the cycle a. 55% b. 50% .The MEP a. 2600 kPa b. 800 kPa c. 5890 kPa d. 4495 kPa c. 60% d. 45% c. 3300 K d. 4050 K c. 1300 kPa d. 2900 kPa

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