PLEASE ANSWER ALL OF THIS QUESTION ASAP!! DUAL COMBUSTION CYCLE5. The intake conditions for an engine operating on air-standard Dual cycle with acompression ratio of 15 are 1 bar and 300 K. The pressure ratio during constant volumeheating is 1.5 and the volume ratio during the constant pressure part of the heating processis 1.8. For an air flow of 1.25 kg/s, determine the thermal efficiency, the work output, in kW,and the MEP, in kPa, of engine.

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Answered: 5. The intake conditions for an engine…

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 an engine working on Dual cycle, the temperature and pressure at the beginning of the cycle are 90°C and 1 bar respectively. The compression ratio is 9. The maximum pressure is limited to 68 bar and total heat supplied per kg of air is 1750 kJ. Determine the following:a. Pressure and temperatures at all salient points b. Air standard efficiency c. Mean effective pressure
In an engine working on Dual cycle, the temperature and pressure at the beginning of the cycle are 90°C and 1 bar respectively. The compression ratio is 9. The maximum pressure is limited to 68 bar and total heat supplied per kg of air is 1750 kJ. Determine the following: a. Pressure and temperatures at all salient points b. Air standard efficiency c. Mean effective pressure.
2.9 An air-standard Dual combustion cycle has a maximum cycle pressure of 65 bar. The minimum pressure and temperature are 1 bar and 22°C respectively. The compression ratio is 17 and the mean effective pressure of the cycle is 11 bar. Determine the maximum cycle temperature when the thermal efficiency of the cycle is 65 %. 1000
The volume ratios of compression and expansion for a diesel engine as measured from an indicator diagram are (15.3 and 7.5) respectively. The pressure and temperature at the beginning of the compression are (1 bar and 27°C). Assuming an ideal engine, Determine:- (i) the mean effective pressure (ii) the ratio of maximum pressure to mean effective pressure (iii) cycle efficiency. Assume for air : Cp = 1.005 kJ/kg K ; Cv = 0.718 kJ/kg K, y = 1.4.
In an isochoric and isobaric combustion cycle, the indicated mean pressure is 10 bars and the maximum pressure is 60 bars. The pressure and temperature at the start of the cycle are 1 bar and 17 oC. The volumetric compression ratio is 16/1. The mass constant of gas, R = 287 J / kg K The specific heat at constant volume, cv = 718 J / kg K. Calculate the maximum temperature of the combustion cycle for a thermal efficiency of 60%.
Part 1 A spark ignition engine that operates on Otto cycle has a compression ratio of 10. At the beginning of the compression process, air is at 100 kPa and 25 C. 750 kJ/kg of heat is transferred to air during the constant-volume heat-addition process. Consider the variation of specific heats with temperature. (d) Explain the relationship between thermal efficiency (n) and compression ratio (r). (e) Why are high compression ratios not used in spark ignition engines? (f) Determine the pressure and temperature at the end of the heat addition process (e) Determine the net-work output, the thermal efficiency, and the mean effective pressure for the cycle.
An engine working on air-standard dual cycle has compression ratio 9.the pressure and temperature at the beginning of the cycle are 1 bar and 90 degrees * C . the maximum pressure of the cycle is limited to 68 bar and total heat supplied during the cycle is 1750 kj/kg. Determine a) pressure and temperature at the end of the expansion (b) thermal efficiency (c) MEP Assume cp, cv = 1.007, 0.7 kj/kg.
At the beginning of the compression process of an air standard Otto cycle, p1 = 1 bar, T1 = 300 K. The maximum temperature in the cycle is 2250 K and the compression ratio is 9.8. The engine has 4 cylinders and an engine displacement of Vd = 2.6 L. Determine per cylinder:1) the heat rejection per cycle, in kJ.2) the net work per cycle, in kJ.3) the thermal efficiency.
At the beginning of the compression process of an air-standard Diesel cycle operating with a compression ratio of 18, the temperature is 300 K and the pressure is 0.1 MPa. The cut-off ratio for the cycle is 2 and mass flow rate in the system is 1900 kg/hr.cp = 1.006 kJ/kg K cv = 0.717 kJ/kg K calculate the thermal efficiency of the cycle in %? Answer to 1 decimal place.
At the beginning of the compression process of an air-standard Diesel cycle operating with a compression ratio of 18, the temperature is 300 K and the pressure is 0.1 MPa. The cut-off ratio for the cycle is 2 and mass flow rate in the system is 1900 kg/hr.cp = 1.006 kJ/kg K cv = 0.717 kJ/kg K 1. calculate the thermal efficiency of the cycle in %?Answer to 1 decimal place. 2. calculate the work output of the engine in kW?Answer to 0 decimal place.
In an isochoric and isobaric combustion cycle, the indicated average pressure is 10 bars and the maximum pressure is 60 bars. The pressure and temperature at the start of the cycle are 1 bar and 17 oC. The volumetric compression ratio is 16/1. The mass constant of gas, R = 287 J / kg K The specific heat at constant volume, cv = 718 J / kg K. Calculate the maximum temperature of the combustion cycle for a thermal efficiency of 60%.
The compression ratio of an air-standard dual cycle is 12. The pressure at the beginning of compression is 14.7 psia, the volume is 75 in3, and the temperature is 100 F. During the heat-addition processes, 0.4 Btu is transferred at constant volume and 1.0 Btu at constant pressure. Determine the cycle state points.

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