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The use of regenerator in a gas turbine cycle
- a)Increases efficiency but has no effect on output
- b)Increases output but has no effect on efficiency
- c)Increases both efficiency and output
- d)Increases efficiency but decreases output
Correct answer is option 'A'. Can you explain this answer?
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The use of regenerator in a gas turbine cyclea)Increases efficiency bu...
The addition of regenerator in gas turbine reduces the heat required from
external source but work output remains same and efficiency increases.
external source but work output remains same and efficiency increases.
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The use of regenerator in a gas turbine cyclea)Increases efficiency bu...
The Use of Regenerator in a Gas Turbine Cycle
The use of a regenerator in a gas turbine cycle can have a significant impact on the efficiency of the cycle. A regenerator is a device that recovers waste heat from the exhaust gases of a gas turbine and uses it to preheat the compressed air before it enters the combustion chamber. This preheating process reduces the amount of fuel needed for combustion, thus improving the overall efficiency of the cycle.
Explanation:
- Gas Turbine Cycle: Before discussing the use of a regenerator in a gas turbine cycle, it is important to understand the basic working of a gas turbine cycle. In a gas turbine cycle, air is compressed, fuel is added and combusted, and the hot gases are expanded through a turbine to produce mechanical work. The exhaust gases leaving the turbine still contain a significant amount of heat energy.
- Regenerator: A regenerator is a heat exchanger that is placed between the compressor and the combustion chamber in a gas turbine cycle. It consists of a matrix of heat-absorbing material, such as ceramic or metal, through which the hot exhaust gases flow. The compressed air from the compressor passes through the regenerator and picks up heat from the matrix. This preheated air is then supplied to the combustion chamber, reducing the fuel required for combustion.
- Increase in Efficiency: By preheating the compressed air, a regenerator increases the temperature of the air entering the combustion chamber. This increase in temperature results in more complete combustion of the fuel, leading to higher thermal efficiency. The regenerator also reduces the temperature difference between the air and the combustion products, reducing the irreversibilities in the combustion process. Overall, the regenerator helps in recovering waste heat and using it to increase the efficiency of the gas turbine cycle.
- No Effect on Output: While a regenerator improves the efficiency of the gas turbine cycle, it does not have a direct impact on the power output of the turbine. The power output of the turbine primarily depends on the mass flow rate of the working fluid and the pressure difference across the turbine. The regenerator does not affect these parameters and thus does not have a direct impact on the power output.
Therefore, the correct answer is option 'A': The use of a regenerator in a gas turbine cycle increases efficiency but has no effect on the output.
The use of a regenerator in a gas turbine cycle can have a significant impact on the efficiency of the cycle. A regenerator is a device that recovers waste heat from the exhaust gases of a gas turbine and uses it to preheat the compressed air before it enters the combustion chamber. This preheating process reduces the amount of fuel needed for combustion, thus improving the overall efficiency of the cycle.
Explanation:
- Gas Turbine Cycle: Before discussing the use of a regenerator in a gas turbine cycle, it is important to understand the basic working of a gas turbine cycle. In a gas turbine cycle, air is compressed, fuel is added and combusted, and the hot gases are expanded through a turbine to produce mechanical work. The exhaust gases leaving the turbine still contain a significant amount of heat energy.
- Regenerator: A regenerator is a heat exchanger that is placed between the compressor and the combustion chamber in a gas turbine cycle. It consists of a matrix of heat-absorbing material, such as ceramic or metal, through which the hot exhaust gases flow. The compressed air from the compressor passes through the regenerator and picks up heat from the matrix. This preheated air is then supplied to the combustion chamber, reducing the fuel required for combustion.
- Increase in Efficiency: By preheating the compressed air, a regenerator increases the temperature of the air entering the combustion chamber. This increase in temperature results in more complete combustion of the fuel, leading to higher thermal efficiency. The regenerator also reduces the temperature difference between the air and the combustion products, reducing the irreversibilities in the combustion process. Overall, the regenerator helps in recovering waste heat and using it to increase the efficiency of the gas turbine cycle.
- No Effect on Output: While a regenerator improves the efficiency of the gas turbine cycle, it does not have a direct impact on the power output of the turbine. The power output of the turbine primarily depends on the mass flow rate of the working fluid and the pressure difference across the turbine. The regenerator does not affect these parameters and thus does not have a direct impact on the power output.
Therefore, the correct answer is option 'A': The use of a regenerator in a gas turbine cycle increases efficiency but has no effect on the output.
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The use of regenerator in a gas turbine cyclea)Increases efficiency but has no effect on outputb)Increases output but has no effect on efficiencyc)Increases both efficiency and outputd)Increases efficiency but decreases outputCorrect answer is option 'A'. Can you explain this answer?
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