An engine with 200 mm cylinder diameter and 300 mm stroke works on theoretical Diesel cycle. The initial pressure and temperature of air used are 1 bar and 27°C. The cut- off is 8% of the stroke. Determine : (i) Pressures and temperatures at all salient points, (ii) Theoretical air standard efficiency, (iii) Mean effective pressure. Assume that compression ratio is 15 and working fluid is air. Consider all conditions to be ideal.

An engine with 200 mm cylinder diameter and 300 mm stroke works on theoretical Diesel cycle. The initial pressure and temperature of air used are 1 bar and 27°C. The cut- off is 8% of the stroke. Determine : (i) Pressures and temperatures at all salient points, (ii) Theoretical air standard efficiency, (iii) Mean effective pressure. Assume that compression ratio is 15 and working fluid is air. Consider all conditions to be ideal.

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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Question

An engine with 200 mm cylinder diameter and 300 mm stroke works on theoretical
Diesel cycle. The initial pressure and temperature of air used are 1 bar and 27°C. The cut-
off is 8% of the stroke. Determine : (i) Pressures and temperatures at all salient points, (ii)
Theoretical air standard efficiency, (iii) Mean effective pressure. Assume that
compression ratio is 15 and working fluid is air. Consider all conditions to be ideal.

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Required information Problem 09.052 - Ideal Diesel Cycle with Variable Specific Heats - DEPENDENT MULTI-PART PROBLEM - ASSIGN ALL PARTS An air-standard Diesel cycle has a compression ratio of 16 and a cutoff ratio of 2. At the beginning of the compression process, air is at 103 kPa and 27°C. Account for the variation of specific heats with temperature. The gas constant of air is R= 0.287 kJ/kg-K. Problem 09.052.b - Thermal Efficiency in Variable Heat Capacity Diesel Cycle Determine the thermal efficiency. (You must provide an answer before moving on to the next part.) The thermal efficiency is 59.38 %.
Cycle work of an air standard otto engine is 1100 kj/kg. Maximum cycle temperature is 3300 deg. C and the temperature at the end of isentropic compression is 700 deg. C. Calculate the compression ratio of the engine. (A) 9.34 (B) 6.25 7.78 (D) 8.54