Q₂) In an engine working on the ideal otto cycle, thethe pressure and temperature at the beginning of Compressionare 100 kPa and 40% respectivly. If the air-standardefficiency of the engine is so`%-, determine (1) the Compressionratio, and (ii) the Pressure and temperature at the end2of adiabatic Compression. Assume Y for air as 1.4.

To find: The compression ratio of the otto cycle, the pressure and temperature at the end of…

Answered: Q2) In an engine working on the 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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At the beginning of the compression process of an air-standard Otto cycle, P1=1bar, T1=290K, V1=400cm3. The maximum temperature in the cycle is 2200K and the compression ratio is 8. Determine the (a) net power output, in kW, if the engine has four cylinders and the cycle is repeated 1200 times per minute in each cylinder. Also, (b) show the T-s and P-? diagrams. Note that the specific heats are NOT constant.
12 - In the ideal Diesel cycle, the compression ratio is 30. The initial temperature of the air is 298 K and the pressure is 98 kPa. If the net work of the cycle is 875 kJ/kg, which of the following is the Average Effective Pressure? a) 932.6 kPa B) 1037.2 kPa NS) 1016.9 kPa D) 895.3 kPa TO) 982.7 kPa
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. Determine the thermal efficiency of the cycle in %.
At the beginning of the compression process of 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 the mass flow rate in the system is 1900 kg/hr. Cp=1.006 kJ/kg K Cv= 0.717 kJ/kg K 1) which formula should be used to determine the temperature after heating 2) calculate the temperature after isentropic compression in the presentable unit? 3) calculate the temperature after isentropic expansion in the presentable unit?
At the beginning of the compression process of an air-standard Otto cycle, P1=1bar, T1=290K, V1=400cm3. The maximum temperature in the cycle is 2200K and the compression ratio is 8. Determine the (a) heat addition, in kJ, (b) ????, in kJ, (c) thermal efficiency, and (d) mean effective pressure, in kPa. Consider the cycle as a model of the processes in each cylinder of a spark-ignition engine. Determine the (e) net power output, in kW, if the engine has four cylinders and the cycle is repeated 1200 times per minute in each cylinder. Also, (f) show the T-s and P-? diagrams. Note that the specific heats are NOT constant.
The compression ratio of an air-standard Otto cycle is 9.5. Assume the start of isentropic (reversible adiabatic) compression is state point 1. Prior to the isentropic compression process, the air is at 100 kPa, 35°C, and 600 cm3. The temperature at the end of the isentropic (reversible) expansion process is 800 K. Take the average values of the specific heat capacities, cP = 1.005 kJ/(kg·K) and cv = 0.718 kJ/(kg·K). (a) Draw the Otto cycle on both the P-v and T-s diagrams. Determine the: (b) highest temperature (in K) and pressure (in kPa) in the cycle, (c) amount of total heat transferred in, in kJ, (d) thermal efficiency, and (e) mean effective pressure in kPa.
The compression ratio of an air-standard Otto cycle is 9.5. Assume the start of isentropic (reversible adiabatic) compression is state point 1. Prior to the isentropic compression process, the air is at 100 kPa, 35°C, and 600 cm3. The temperature at the end of the isentropic (reversible) expansion process is 800 K. Take the average values of the specific heat capacities, cP = 1.005 kJ/(kg·K) and cv = 0.718 kJ/(kg·K). (a) Draw the Otto cycle on both the P-v and T-s diagrams. Determine the: (b) highest temperature (in K) and pressure (in kPa) in thecycle, (c) amount of total heat transferred in, inkJ, (d) thermal efficiency, and (e) 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 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.
At the beginning of compression in an air-standard Diesel cycle, p1 = 96 kPa, V1 = 0.016 m3, and T1 = 290 K. The compression ratio is 15 and the maximum cycle temperature is 1290 K. Determine (a) the mass ofair, in kg. (b) the heat addition and heat rejection per cycle, each in kJ. (c) the net work, in kJ, and d) the thermal efficiency. (e) Solve the problem on a cold air-standard basis with constant specific heats.
At the beginning of the compression process of an air-standard Otto cycle, p1 = 100 kPa, T1 = 290 K, V1 = 400 cm3. The maximum temperature in the cycle is 2200 K and the compression ratio is 8. Determine the (a) thermal efficiency; and (b) mean effective pressure, in bar. (c) Solve on a cold air-standard basis with constant specific heats.
At the beginning of the compression process of an air-standard Otto cycle, P1=1bar, T1=290K, V1=400cm3. The maximum temperature in the cycle is 2200K and the compression ratio is 8.00. Determine the (a) heat addition, in kJ, (b) ????, in kJ, (c) thermal efficiency, and (d) mean effective pressure, in kPa. Consider the cycle as a model of the processes in each cylinder of a spark-ignition engine. Determine the (e) net power output, in kW, if the engine has four cylinders and the cycle is repeated 1200 times per minute in each cylinder. Note that the specific heats are NOT constant.
Q1/ An air-standard Otto cycle has a compression ratio of 8.5. At the beginning of compression, p;=100 kPa and T;=310 K. The heat addition per unit mass of air is 1440 kJ/kg. Determine (a) the net work. in kJ per kg of air. (b) the thermal efficiency of the cycle. (c¢) the mean effective pressure. in kPa. (d) the maximum temperature in the cycle, in K.

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