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In a reversed Brayton cycle, the heat is absorbed by the air during
- a)isentropic compression process
- b)constant pressure cooling process
- c)isentropic expansion process
- d)constant pressure expansion process
Correct answer is option 'D'. Can you explain this answer?
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In a reversed Brayton cycle, the heat is absorbed by the air duringa)i...
Reversed Brayton Cycle and Heat Absorption
Reversed Brayton Cycle:
The Reversed Brayton Cycle is a thermodynamic cycle that is used for refrigeration and cooling purposes. It is also known as the Joule Cycle or the Bell Coleman Cycle. The cycle is a modification of the Brayton Cycle, which is used in gas turbines.
Process in the Reversed Brayton Cycle:
The Reversed Brayton Cycle consists of four processes, which are as follows:
1. Constant Pressure Cooling Process: In this process, the working fluid (air) is cooled at a constant pressure. The cooling is done by passing the air over a cooler.
2. Isentropic Expansion Process: In this process, the cooled air is expanded isentropically in a turbine. The expansion process results in a decrease in the temperature and pressure of the air.
3. Constant Pressure Heating Process: In this process, the expanded air is heated at a constant pressure. The heating is done by passing the air over a heat exchanger.
4. Isentropic Compression Process: In this process, the heated air is compressed isentropically in a compressor. The compression process results in an increase in the temperature and pressure of the air.
Heat Absorption in the Reversed Brayton Cycle:
The heat is absorbed by the air during the constant pressure expansion process. In this process, the air is expanded isentropically in a turbine, which results in a decrease in the temperature and pressure of the air. The decrease in temperature is due to the heat absorption by the air. The heat is absorbed because the expansion process is accompanied by work extraction. The work extraction results in a decrease in the internal energy of the air, which is compensated by the absorption of heat from the surroundings.
Reversed Brayton Cycle:
The Reversed Brayton Cycle is a thermodynamic cycle that is used for refrigeration and cooling purposes. It is also known as the Joule Cycle or the Bell Coleman Cycle. The cycle is a modification of the Brayton Cycle, which is used in gas turbines.
Process in the Reversed Brayton Cycle:
The Reversed Brayton Cycle consists of four processes, which are as follows:
1. Constant Pressure Cooling Process: In this process, the working fluid (air) is cooled at a constant pressure. The cooling is done by passing the air over a cooler.
2. Isentropic Expansion Process: In this process, the cooled air is expanded isentropically in a turbine. The expansion process results in a decrease in the temperature and pressure of the air.
3. Constant Pressure Heating Process: In this process, the expanded air is heated at a constant pressure. The heating is done by passing the air over a heat exchanger.
4. Isentropic Compression Process: In this process, the heated air is compressed isentropically in a compressor. The compression process results in an increase in the temperature and pressure of the air.
Heat Absorption in the Reversed Brayton Cycle:
The heat is absorbed by the air during the constant pressure expansion process. In this process, the air is expanded isentropically in a turbine, which results in a decrease in the temperature and pressure of the air. The decrease in temperature is due to the heat absorption by the air. The heat is absorbed because the expansion process is accompanied by work extraction. The work extraction results in a decrease in the internal energy of the air, which is compensated by the absorption of heat from the surroundings.
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In a reversed Brayton cycle, the heat is absorbed by the air duringa)i...
B) constant pressure cooling process
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In a reversed Brayton cycle, the heat is absorbed by the air duringa)isentropic compression processb)constant pressure cooling processc)isentropic expansion processd)constant pressure expansion processCorrect answer is option 'D'. Can you explain this answer?
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