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In an Otto cycle, the heat addition and heat rejection take place at
- a)constant volume and at constant pressure, respectively
- b)constant volume and at constant volume, respectively
- c)constant pressure and at constant volume, respectively
- d)constant pressure and at constant pressure, respectively
Correct answer is option 'B'. Can you explain this answer?
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Verified Answer
In an Otto cycle, the heat addition and heat rejection take place ata...
Otto cycle: The standard air cycle used in the spark ignition (SI) engines or petrol engines.
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Different processes of the Otto cycle are as follows:
Process 1-2: Isentropic compression
Process 2-3: Constant volume heat addition
Process 3-4: Isentropic expansion
Process 4-1: Constant volume heat rejection.
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In an Otto cycle, the heat addition and heat rejection take place ata...
Explanation:
The Otto cycle is a thermodynamic cycle that is used in spark-ignition internal combustion engines (ICEs). It consists of four processes: intake, compression, power, and exhaust. In this cycle, the heat addition and heat rejection take place at constant volume and constant volume, respectively.
Heat Addition:
During the power stroke, the fuel-air mixture is ignited by a spark plug. The resulting combustion causes a rapid increase in pressure and temperature inside the cylinder. This process is known as the heat addition process. The heat addition process takes place at constant volume because the piston is held in a fixed position by the crankshaft, and the volume of the combustion chamber does not change during this process.
Heat Rejection:
After the power stroke, the exhaust valve opens, and the burned gases are expelled out of the cylinder. This process is known as the exhaust stroke. During this stroke, the pressure and temperature inside the cylinder decrease rapidly. This process is known as the heat rejection process. The heat rejection process takes place at constant volume because the piston is still held in a fixed position by the crankshaft, and the volume of the combustion chamber does not change during this process.
Conclusion:
Hence, it can be concluded that the heat addition and heat rejection take place at constant volume in an Otto cycle.
The Otto cycle is a thermodynamic cycle that is used in spark-ignition internal combustion engines (ICEs). It consists of four processes: intake, compression, power, and exhaust. In this cycle, the heat addition and heat rejection take place at constant volume and constant volume, respectively.
Heat Addition:
During the power stroke, the fuel-air mixture is ignited by a spark plug. The resulting combustion causes a rapid increase in pressure and temperature inside the cylinder. This process is known as the heat addition process. The heat addition process takes place at constant volume because the piston is held in a fixed position by the crankshaft, and the volume of the combustion chamber does not change during this process.
Heat Rejection:
After the power stroke, the exhaust valve opens, and the burned gases are expelled out of the cylinder. This process is known as the exhaust stroke. During this stroke, the pressure and temperature inside the cylinder decrease rapidly. This process is known as the heat rejection process. The heat rejection process takes place at constant volume because the piston is still held in a fixed position by the crankshaft, and the volume of the combustion chamber does not change during this process.
Conclusion:
Hence, it can be concluded that the heat addition and heat rejection take place at constant volume in an Otto cycle.
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In an Otto cycle, the heat addition and heat rejection take place ata)constant volume and at constant pressure, respectivelyb)constant volume and at constant volume, respectivelyc)constant pressure and at constant volume, respectivelyd)constant pressure and at constant pressure, respectivelyCorrect answer is option 'B'. Can you explain this answer?
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