Q8 In an ideal Diesel cycle the pressure and temperature at the beginning ofcompression are (98.5 KN/m²) and (60 °C) respectively. The maximum pressureattained during the cycle is (4.5 MN/m²) and the heat received during the cycle is(850 Kj/Kg) of working fluid. Determine (a) the compression ratio. (b) the temperatureat the end of compression and (c) the temperature at the end combustion.Answers (a) 15.3, (b) 989 K, (c) 1566 K

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Answered: Q8 In an ideal Diesel cycle the…

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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A petrol engine with compression ratio of 11:1 was analysed as an air-standard cycle. The inlet pressure and temperature of the air are 101 kPa and 19 °C respectively while the maximum temperature of the cycle is 1,067 °C. The mass flow rate of air through the engine is 605 kg/min when running at its optimum speed. Thake the specific heat capacites at constant pressure as 1.0052 and 0.716 kJ/kgK. Calculate the power obtainable from the cycle in kilo of SI unit to 1 decimal place. Provide the units in the answer.
The pressure and temperature at the beginning of compression of an air-standard Diesel cycle are 90 kPa and 300 K, respectively. At the end of the heat addition, the pressure is 6821 kPa and the temperature is 1950 K. Step 1 Determine the compression ratio. Save for Later Attempts: 0 of 3 used Submit Answer
The compression ratio of an air-standard Otto cycle is 7.5. P1 = 85 kPa and T1 = 32 Celsius at the startof compression. The highest temperature in the cycle is 960 K, and the mass of air is 3 g. determine the: (a) the heat rejection, in kJ, (b) the network, in kJ (c) the thermal efficiency, and the (d) mean effective pressure, in kPa. Show complete solution.
The compression ratio in an air-standard Otto cycles is 8 . At the beginning of the compression stroke the pressure is 0.1 Mpa and the Temperature is 15 °c . The total heat transfer to the air per cycle is 1800 kj / kg air . Determine : * The pressure and temperature at the end of each process of the cycle . * The thermal efficiency .
An air-standard Diesel cycle has a maximum temperature of 1800 K. At the beginning of compression, pq =95 kPa and T1 = 300 K. The mass of air is 12 g. For a compression ratio of 15, determine (a) the net work of the cycle, in KkJ. (b) the thermal efficiency. (c) the mean effective pressure, in kPa.
An air-standard Diesel cycle has a maximum temperature of 1800 K. At the beginning of compression, p1 = 95 kPa and T4 = 300 K. The mass of air is 12 g. For a compression ratio of 15, determine (a) the net work of the cycle, in KJ. (b) the thermal efficiency. (c) the mean effective pressure, in kPa.
Consider an air-standard Otto cycle that has a compression ratio of 9.0 and a heat addition of 870 Btu/lbm. If the pressure and temperature at the beginning of the compression process are 14.0 psia and 40 °F, determine a. the maximum pressure and temperature for the cycle, b. the thermal efficiency, and c. the mean effective pressure, in psia
An air-standard Diesel cycle has a maximum temperature of 1800 K. At the beginning of compression, p1 = 95 kPa and Tq = 300 K. The mass of airis 12 g. For a compression ratio of 15, determine (a) the net work of the cycle, in kJ. (b) the thermal efficiency. (c) the mean effective pressure, in kPa.
Q8 In an ideal constant volume cycle the pressure and temperature at the beginning of compression are (103bar) and (50 °C) respectively and the compression ratio (8:1). The heat supplied during the cycle is (840Kj/Kg) of working fluid. Determine (a) the maximum temperature attained in cycle. (b) the thermal efficiency of the cycle. (c) the work done in Kj during the cycle per Kg of working fluid. Answers (a) 1925 K, (b) 56.4 %, (c) 474.36 Kj/Kg
The max temperature of an Otto cycle working under air standard conditions is 8000 degrees Celsius. Determine the compression ratio of the cycle if the heat injected in each cycle is 350kJ/kg.
An air-standard Diesel cycle has a maximum temperature of 2000 K. At the beginning of compression, p1 = 95 kPa and T1 = 300 K. The mass of air is 12 g. For a compression ratio of 20, determine:(a) the net work of cycle in kJ(b) the percent thermal efficiency.
The compression ratio in an air-standard Otto cycle is 10. At the beginning of the compression stroke the pressure is 0.10 MPa and the temperature is 15°C. The heat transfer to the air per cycle is 1800 kJ/kg air. Determine (a) the pressure and temperature at the end of each process of the cycle and (b) the thermal efficiency.

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