An oil engine, working on the dual combustion cycle, has a compression ratio of 13:1. The heat supplied per kg of air is 2000KJ, half of which is supplied at constant volume and the other half at constant pressure. If the temperature and pressure at the beginning of compression are 100°C and 1 bar respectively, find (i) the maximum pressure in the cycle and (ii) the percentage of stroke when cut-off occurs. Assume y-1.4, R=0.287 kJ/kg.K and CV = 0.709 + 0.000028T kJ/kg.K.

An oil engine, working on the dual combustion cycle, has a compression ratio of 13:1. The heat supplied per kg of air is 2000KJ, half of which is supplied at constant volume and the other half at constant pressure. If the temperature and pressure at the beginning of compression are 100°C and 1 bar respectively, find (i) the maximum pressure in the cycle and (ii) the percentage of stroke when cut-off occurs. Assume y-1.4, R=0.287 kJ/kg.K and CV = 0.709 + 0.000028T kJ/kg.K.

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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In a constant volume cycle, the pressure at the end of compression is 10 times that at the start, the temperature limits are 20 ° C and 1900 ° C. Determine i. Compression ratio, ii. Thermal efficiency and iii. Work done. Take R = 287 J/kg K, y = 1.4