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Assertion (A): The thermal efficiency of gas turbine plants is higher compared todiesel plants.
Reason (R): The mechanical efficiency of gas turbines is higher compared to dieselengines.
- a)Both A and R are individually true and R is the correct explanation of A
- b)Both A and R are individually true but R is not the correct explanation of A
- c)A is true but R is false
- d)A is false but R is true
Correct answer is option 'D'. Can you explain this answer?
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Assertion (A): The thermal efficiency of gas turbine plants is higher ...
A is false and R is true
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Assertion (A): The thermal efficiency of gas turbine plants is higher ...
Thermal Efficiency of Gas Turbine Plants vs Diesel Plants
Assertion (A): The thermal efficiency of gas turbine plants is higher compared to diesel plants.
Reason (R): The mechanical efficiency of gas turbines is higher compared to diesel engines.
The correct answer is option 'D' - A is false but R is true.
Explanation:
Thermal Efficiency:
- The thermal efficiency of a power plant is a measure of how effectively it converts the energy from its fuel into useful work.
- It indicates the percentage of energy in the fuel that is converted into useful output, such as electricity or mechanical work.
- Higher thermal efficiency means that a power plant can produce more work from the same amount of fuel.
Gas Turbine Plants:
- Gas turbine power plants are commonly used for electricity generation, aircraft propulsion, and industrial applications.
- They work on the principle of Brayton cycle, where air is compressed, heated by burning fuel, and expanded to produce work.
- Gas turbines have high thermal efficiency due to several factors:
1. Higher Compression Ratio: Gas turbines can achieve higher compression ratios compared to diesel engines, resulting in better thermal efficiency.
2. Higher Operating Temperatures: Gas turbines operate at higher temperatures, which improves the conversion of heat into work.
3. Lower Heat Losses: Gas turbines have lower heat losses to the surroundings, as they have smaller surface areas and less cooling requirements compared to diesel engines.
4. Ability to Use Different Fuels: Gas turbines can burn a wide range of fuels, including natural gas, diesel, and even biofuels, which allows for better fuel flexibility and efficiency.
Diesel Plants:
- Diesel power plants are commonly used in transportation, backup power generation, and remote locations.
- They work on the principle of Diesel cycle, where fuel is injected into compressed air and ignited to produce work.
- Diesel engines have lower thermal efficiency compared to gas turbines due to several factors:
1. Lower Compression Ratio: Diesel engines typically have lower compression ratios compared to gas turbines, resulting in lower thermal efficiency.
2. Lower Operating Temperatures: Diesel engines operate at lower temperatures compared to gas turbines, which leads to lower conversion of heat into work.
3. Higher Heat Losses: Diesel engines have larger surface areas and higher cooling requirements, leading to higher heat losses to the surroundings.
Conclusion:
- The thermal efficiency of gas turbine plants is higher compared to diesel plants due to factors such as higher compression ratio, higher operating temperatures, lower heat losses, and fuel flexibility.
- The mechanical efficiency of gas turbines is not the correct explanation of the higher thermal efficiency of gas turbine plants compared to diesel plants.
Assertion (A): The thermal efficiency of gas turbine plants is higher compared to diesel plants.
Reason (R): The mechanical efficiency of gas turbines is higher compared to diesel engines.
The correct answer is option 'D' - A is false but R is true.
Explanation:
Thermal Efficiency:
- The thermal efficiency of a power plant is a measure of how effectively it converts the energy from its fuel into useful work.
- It indicates the percentage of energy in the fuel that is converted into useful output, such as electricity or mechanical work.
- Higher thermal efficiency means that a power plant can produce more work from the same amount of fuel.
Gas Turbine Plants:
- Gas turbine power plants are commonly used for electricity generation, aircraft propulsion, and industrial applications.
- They work on the principle of Brayton cycle, where air is compressed, heated by burning fuel, and expanded to produce work.
- Gas turbines have high thermal efficiency due to several factors:
1. Higher Compression Ratio: Gas turbines can achieve higher compression ratios compared to diesel engines, resulting in better thermal efficiency.
2. Higher Operating Temperatures: Gas turbines operate at higher temperatures, which improves the conversion of heat into work.
3. Lower Heat Losses: Gas turbines have lower heat losses to the surroundings, as they have smaller surface areas and less cooling requirements compared to diesel engines.
4. Ability to Use Different Fuels: Gas turbines can burn a wide range of fuels, including natural gas, diesel, and even biofuels, which allows for better fuel flexibility and efficiency.
Diesel Plants:
- Diesel power plants are commonly used in transportation, backup power generation, and remote locations.
- They work on the principle of Diesel cycle, where fuel is injected into compressed air and ignited to produce work.
- Diesel engines have lower thermal efficiency compared to gas turbines due to several factors:
1. Lower Compression Ratio: Diesel engines typically have lower compression ratios compared to gas turbines, resulting in lower thermal efficiency.
2. Lower Operating Temperatures: Diesel engines operate at lower temperatures compared to gas turbines, which leads to lower conversion of heat into work.
3. Higher Heat Losses: Diesel engines have larger surface areas and higher cooling requirements, leading to higher heat losses to the surroundings.
Conclusion:
- The thermal efficiency of gas turbine plants is higher compared to diesel plants due to factors such as higher compression ratio, higher operating temperatures, lower heat losses, and fuel flexibility.
- The mechanical efficiency of gas turbines is not the correct explanation of the higher thermal efficiency of gas turbine plants compared to diesel plants.
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Assertion (A): The thermal efficiency of gas turbine plants is higher compared todiesel plants.Reason (R): The mechanical efficiency of gas turbines is higher compared to dieselengines.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is not the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'D'. Can you explain this answer?
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