Q6: An ideal Diesel engine has a diameter of (15 cm) and stroke (20 cm). Theclearance volume is (10 %) of the swept volume. Determine the compression ratioand the air standard efficiency of the engine if the cut-off takes place at (6%) of thestroke. Answers: 11,57%f=J+0.63Je

Answered: Image /qna-images/answer/67f1d5b8-5ba1-4a47-8f27-c7b4f8f147de.jpg

Answered: Q6: An ideal Diesel engine has a…

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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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
13. The pressures on the compression curve of a diesel engine are at th stroke 1.4 bar and at th stroke 14 bar. Estimate the compression ratio. Calculate the air standard efficiency of the engine if the cut-off occurs at tth of the stroke. (Ans. 18.54 ; 63.7%)
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The Fifth Question: A six-cylinder, 4-stroke petrol engine develops 62 H.P at 3000 r.p.m. The volumetric efficiency at N.T.P. is 85%. The bore is equal to the stroke and thermal efficiency of 25 % may be assumed. Calorific value of petrol is 44100 kj/kg. Air-fuel ratio is to be 15:1. Calculate the cylinder bore and stroke.
An Spark Ignition engine at WOT by a three-liter, four-cylinder, four-stroke cycle operates at 4800 RPM using either gasoline or methanol. Compute the indicated power generated SI engine at these operation condition. For each case, the intake manifold is heated such that all fuel is evaporated before the intake ports, and the air-fuel mixture enters the cylinders at 60°C and 100 kPa. Compression ratio r. = 8.5, fuel equivalence ratio ¢= 1.0, combustion efficiency is 98%, and volumetric efficiency is 100%. Calculate the indicated specific fuel consumption for each fuel. [gm/kW-hr]
A The compression ratio of a diesel cycle is 15.5, and the cutoff occurs at 10% of the stroke.14 psia and 600 K characterize state 1. Calculate the following for the hot-air standard with k= 1.34and a starting volume of 2 cu ft:a. Find T2 , P2 , V2 , T3 , V3 , P4 , and T4b. Compute the heat added (QA),heat rejected (QR), work (W) andthe cycle efficiency (e).c. for a rate of circulation of 1000 cfm,compute the horsepower. (full solution pls)
A The compression ratio of a diesel cycle is 15.5, and the cutoff occurs at 10% of the stroke.14 psia and 600 K characterize state 1. Calculate the following for the hot-air standard with k= 1.34and a starting volume of 2 cu ft:a. Find T2 , P2 , V2 , T3 , V3 , P4 , and T4b. Compute the heat added (QA),heat rejected (QR), work (W) andthe cycle efficiency (e).c. for a rate of circulation of 1000 cfm,compute the horsepower.
i need the answer quickly
The swept volume of an engine working on the dual combustion cycle is 0.1068m³. The clearance volume is 8% of the swept volume. At the beginning of compression the air conditions are 100kPa and 42°C The maximum cycle conditions are 4500kPa and 1500°C. Calculate: (a). thermal efficiency (b). mean effective pressure (c). exhaust pressure (d). air-fuel ratio if the calorific value of the fuel is 43MJ/kg Assume the compression and expansion to be adiabatic. Use the standard constants for air.
Answer the following questions.
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A The compression ratio of a diesel cycle is 15.5, and the cutoff occurs at 10% of the stroke. 14 psia and 600 K characterize state 1. Calculate the following for the hot-air standard with k= 1.34 and a starting volume of 2 cu ft:a. Find T2 , P2 , V2 , T3 , V3 , P4 , and T4b. Compute the heat added (QA), heat rejected (QR), work (W) and the cycle efficiency (e).c. for a rate of circulation of 1000 cfm, compute the horsepower

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Q6: An ideal Diesel engine has a diameter of (15 cm) and stroke (20 cm). The clearance volume is (10 %) of the swept volume. Determine the compression ratio and the air standard efficiency of the engine if the cut-off takes place at (6%) of the stroke. Answers: 11,57% f= J+0.63 Je